The Kynix Blog - Resistors

CatalogIntroductionⅠ How to Wire a Relay?Ⅱ Why Use a Relay?Ⅲ Relay Wiring DiagramⅣ 4 Pin Relay Wiring Diagram vs 5 Pin Relay Wiring Diagram4.1 The Main Difference between 4 or 5 Pin Relays4.2 4 Pin Relay Wiring Diagram4.3 Sample Wiring Diagrams for a 4 Pin Normally Open Relay4.4 Why to Use a 4 Pin Relay for Driving Lights4.5 5 Pin Relay Wiring Diagram4.6 How To Use 5 Pin Relay4.7 5 Pin Relay Wiring Diagram for lightsⅤ FAQIntroductionIn layman's terms, a relay is an electromagnetic switch that is typically used to switch the power supply either automatically or manually. In this post, I'll go over the fundamentals of 4 and 5 pin relay wiring diagrams. The relay comes in a variety of shapes and sizes. It can be based on the pins or contacts, ampers, or voltage ratting (AC or DC). These contacts are pins 4, 5, 8, 11, 14, and so on. However, we have two coil pins on each pin. Where we supply the necessary ratting current. As an example, suppose we have a 12-volt DCV relay. As a result, we will supply 12 volts of DC (Direct current) to the relay coil. And if we have the 220 ACV, we can supply the relay coil with 220 volts AC (alternating current).The remaining pins and contacts are known as main contacts or switching contacts. The relay switching pins include the following: common, NC (normally open), and NO (normally close).Ⅰ How to Wire a Relay?How To Wire A Relay - Quick TipStill confused? See the full video here. Ⅱ Why Use a Relay?There are several reasons why you might need or want to use a relay:Using a lower current circuit to replace a high current circuit.This is the most common reason, and it is useful when an in-line switch or existing circuit cannot handle the required current. For example, if you wanted to install some high-powered work lights that activate with the headlights, there's a chance they'd exceed the capacity of the existing loom.Cost SavingBecause high current capacity wiring and switches are more expensive than lower current capacity versions, using relays reduces the need for more expensive components.Activating more than one circuit from a Single InputA single input signal from one part of an electrical system (e.g., central locking output, manual switch, etc.) can be used to activate one or more relays, which then complete one or more other circuits, allowing you to carry out multiple functions from a single input signal.Carrying Out Logic FunctionsWhen linked together, electromagnetic relays can be used to perform logical operations based on specific inputs (for example, latching a +12V output on and off from a momentary input, flashing alternative left and right lights, and so on). Although electronic modules have largely replaced these logical functions in OEM designs, it can still be useful, fun, and often more cost-effective to use relays to perform them in some after-market projects (particularly where you have a bespoke application).Ⅲ Relay Wiring DiagramA simple wiring diagram of a relay is shown here to help you understand how it works in a circuit.Relay wiring diagramLet's talk about this relay wiring diagram now.It is the relay that is powered by the DC supply. Pin 1 is the magnetic coil's positive pin. Pin 2 is the coil's negative pin. As a result, we used an SPST switch to connect a DC power source across terminals 1 and 2. We can use this switch to turn on or off the power supply to the relay coil whenever we want.Terminal 3 is shared by NO and NC contacts. Terminal 5 is designated as NO, while Terminal 4 is designated as NC. This means that under normal circumstances, terminal 3 is connected to terminal 4. When we apply power to the coil, terminal 3 is connected to terminal 5.As you can see, we connected two LEDs here. The NO terminal is connected to the red LED, and the NC terminal is connected to the green LED. So, under normal circumstances, the green LED will glow, but when we apply power to the relay by turning on the switch, the red LED will glow.Ⅳ 4 Pin Relay Wiring Diagram vs 5 Pin Relay Wiring Diagram4.1 The Main Difference between 4 or 5 Pin RelaysA 4 pin relay controls a single circuit, whereas a 5 pin relay switches power between two circuits.4 Pin Relay2 pins (85 & 86) control the coil and 2 pins (30 & 87) switch power on a single circuit in a 4 pin relay. Four-pin relays are available in two configurations: normally open and normally closed. When the coil is activated, a normally open relay turns on the power to a circuit. When the coil is activated, a normally closed relay turns off the power to the circuit.5 Pin Relay5 pin relays have two pins (85 & 86) for controlling the coil and three pins (30, 87 & 87A) for switching power between two circuits. They have connection pins that are both normally open and normally closed. Power is switched from the normally closed pin to the normally open pin when the coil is activated.4.2 4 Pin Relay Wiring Diagram The diagram of a four-pin relay is depicted in the image below. This circuit diagram will be used later to wire a relay for driving lights.4 Pin Relay Wiring DiagramYou'll need to use a fuse to connect the relay's Pin 30 to the 12V battery for driving lights. We're not directly connecting pin 30 to the battery here; instead, we're using a fuse. This is because the fuse protects us from overcurrents.If there is a fault in the driving light circuit, the fuse protects the burning of lights and other circuits from current overshoots.Pin 85 of the relay is grounded, while Pins 87 and 86 are switching pins. You can turn on the main beams of the driving light using this 4 pin relay by switching the battery connections to either circuit connected with pin 86 or 87 of the relay.4.3 Sample Wiring Diagrams for a 4 Pin Normally Open Relay Sample Wiring Diagrams for a Normally Open RelayExample 1. 4 pin (normally open) relay with the switch on the control circuit's positive side.  Example 2. 4 pin (normally open) relay with the switch on the control circuit's negative side.   Note: These circuits have been simplified to demonstrate the function of a relay and thus do not include the fuse protection that would be required. Relay coil terminals have no polarity unless the relay coil is protected by a diode (inside the relay), in which case the coil terminal wired to the diode's anode must be connected to negative.4.4 Why to Use a 4 Pin Relay for Driving LightsThe main reason for installing this relay system is to keep dangerous voltages outside of your cabin or driving area.The high voltage required by your headlight, which is supplied by the battery, is kept inside the engine compartment by a relay.Simply put, a relay is a switch that is controlled by another switch. The switch installed in the vehicle's sitting cabin, on the front side of the driver, operates on very low voltage. As you can see, this voltage is not high enough to harm the driver or other electronic components. This switch provides power to the relay, which is essentially an electromagnet. It will also control the high current circuit that is directly connected to the headlights.This is how a low current circuit controls a high current circuit, keeping both the driver and the car electronics safe, and why we need a relay in our headlights!4.5 5 Pin Relay Wiring Diagram A pin relay is SPDT relay, which means that the contacts of relay single pole double throw. In single pole double throw relay, we have one pin is common, 2nd are normally close and 3rd are normally open. Two pins for the coil. This relay can be used for different types of controlling or switching. Such as for lights, fan, fuel pump, etc. Here I showed the 5 pin relay wiring diagram. 5 pin relay wiring diagramIn the diagram above, I've depicted a single pole double throw relay (5 pin relay). Not that his relay can be 5 volts DCV, 12 volts DCV, 24 volts DCV, and so on, depending on the coil's ratting voltage. In the above 5 pin relay diagram, pins 1 and 2 are for the coil, pin 3 is the common pin, pin 4 is normally closed, and pin 5 is normally open.4.6 How to Use 5 Pin RelayA relay can be used for a variety of switching purposes. If you want to control electrical devices automatically, a relay is the best option. When we talk about relays, as I previously stated, there are various types of relays for various applications. This post, however, is about the 5 pin relay. As illustrated by the 5 pin relay diagram. This has three main pins. As opposed to a single pole double throw.So when we say single pole double throw, we mean that it has a common point as well as two other points (NC and NO).To switch something from a single pole double throw relay, you must use the common and other points. For example, if you require that the light bulb be turned off when the relay operates. Then you must use a common, normally closed pin. If you want to turn on the light bulb, you must use the common and normally open pins. I've shown how to wire a 5 pin relay for lights in this article.4.7 5 Pin Relay Wiring Diagram for lightsIn the 5 pin relay wiring diagram below, I show how to turn on lights when the relay is activated and how to turn them off when the relay is deactivated.Similarly, if you want to control or wire a fan with a relay, you can use the same method. It is important to note that the ratted voltage must be applied to the relay coil. If your relay is powered by 12 volts DCV. Then you must supply the 12-volt DCV.Ⅴ FAQ1. What costs more than lower current capacity versions?High current capacity wiring and switches.2. What can you use to activate one or more relays?A single input from one part of an electrical system.3. How can you use a single input from one part of an electrical system?To activate one or more relays that then complete one or more other circuits and so carry out multiple functions from one input signal.4. What will switch power on for a circuit when the coil is activated?A normally open relay.5. What is the main purpose of installing a 4 Pin Relay for Driving Lights?To keep dangerous voltages outside of your cabin or driving place.   

IntroductionⅠ Operating Principle of Fuel Pump Relay1.1 How does the Fuel Pump Relay Work?1.2Working Principle of Vehicle Electric Fuel PumpⅡ Fuel Pump Relay Testing and ReplacementⅢ Fuel Pump Relay Inspection and Maintenance Structure FlowⅣ Detection Methods for Faults without Fault Memory of Fuel Pump RelayⅤ Inspecting the Fuel Pump Relay UnitⅥ What Causes Fuel Pump Relays to Fail?Ⅶ How to Prevent Fuel Pump Relay from Getting Damaged after Replacement?Ⅷ How to Diagnose a Bad Fuel Pump Relay?Ⅸ FAQIntroductionWhat is the fuel pump relay? How does it work? There are some measures to deal with the failure of fuel pump relay. Just keep reading our guide to find out!Ⅰ Operating Principle of Fuel Pump RelayWhen the engine starts, the fuel pump relay turns off. The oil pressure sending unit supplies power to the fuel pump at this point. When you turn off the ignition, the fuel pump relay is re-engaged for a short period, allowing the fuel pump to power down and shut off.Figure 1 Operating principle 1.1 How does the Fuel Pump Relay Work?A fuel pump relay functions similarly to a light switch in your home, turning on the lights.The main difference is that there is no direct contact with the switch; rather, the switch is triggered when a sufficient amount of electricity accumulates.The fuel pump is in charge of regulating the pressure within the engine to ensure proper operation.When the engine requires fuel, the pressure is increased to start the injection of fuel into the engine.If there was insufficient pressure, the engine would not receive the necessary fuel, which could result in a misfire.The difference is that instead of directly turning on the internal switch, the control circuit is turned on. This coil then generates an electromagnetic field, closing a pair of metal contacts within the relay. The metal contacts are linked to a controlled circuit, which ultimately activates the fuel pump.1.2 Working Principle of Vehicle Electric Fuel PumpThe electric fuel pump assembly is installed and immersed in fuel in the fuel tank. It is controlled by the ECM and sucks fuel from the fuel tank, filters, and regulates pressure before delivering it to the fuel manifold.The electric fuel pump assembly consists of a fuel pump, a fuel filter, an engine oil pressure regulator, and an oil level sensor.A DC motor, a vane pump, and an end cover comprise the electric fuel pump (integrated check valve, pressure relief valve, and anti-electromagnetic interference components).Figure 2 The wiring diagram of the electric fuel pumpWhen the ignition switch is turned on, the main relay is activated to provide 12V power to the fuel pump relay. At this point, the fuel pump relay will be activated for approximately 2 seconds, causing the electric fuel pump to operate for 2 seconds. Raise the oil pressure in the fuel main pipe to a safe level before starting the engine.When you turn off the engine, the electric fuel pump shuts down. At this point, the one-way valve is closed to maintain residual pressure in the fuel line, making it easier to restart the engine. When the oil pressure on the oil outlet side becomes excessively high, the safety valve opens to drain the fuel, preventing the fuel pressure from becoming excessively high.Figure 3 Electric fuel pumpThe vehicle's current electric fuel system is a non-return system. An oil pressure regulator integrated with the fuel pump assembly adjusts the fuel system pressure to around 380kPa. The fuel that has passed through the fuel filter is redirected to the oil pressure regulator. If the oil pressure is too high, open the regulator's oil return valve to drain the oil and stabilize the oil pressure to a certain value. To detect the fuel level, an oil level sensor is installed in the fuel pump assembly. The sliding resistance principle is used by the oil level sensor. When the oil level drops, the float floating on the oil surface moves downward, causing the contact of the sliding resistance to move downward, and the sensor's resistance value to rise. The oil level sensor has a resistance range of 3108. (depending on the car models).Ⅱ Fuel Pump Relay Testing and Replacementvideo: How to test and replace a fuel pump relayHow to test fuel pump relay? You will learn from this video. In the same time, the principles shown here apply to most vehicles.Ⅲ Fuel Pump Relay Inspection and Maintenance Structure FlowDetection methods for faults without fault memory of Fuel pump relay1. Fuel pump relay fault detection and maintenance schemeThe fault memory of engine control unit is read by detector. Short circuit of fuel pump control to positive pole, short circuit of fuel pump control to ground and open circuit of fuel pump control are three common fault memories related to fuel pump relays.For the above three fault modes, the following detection and maintenance methods are formulated respectively:2. Fuel pump control for positive pole short circuit repair method.First, disconnect the fuel pump relay plug and measure the voltage between the relay slot 2 pins and grounding when the ignition switch is turned on. The rated value should be between -1V and 1V; if the measured value is not within this range, a short-circuit to the positive pole of the connecting 2-pin excitation line exists. If the measured value falls within the above-mentioned rated range, there is no short-circuit to the positive pole. Then, look for any disconnection. Turn off the ignition switch first, then unplug the engine ECU plug, and measure the resistance between pin 2 of the relay slot and pin 80 of the engine ECU plug (for the new Jetta model, the engine ECU controls the fuel pump relay ground terminal through pin 80). If the resistance exceeds 30, the circuit is open. If the resistance is less than 30, the circuit from the fuel pump relay to the engine ECU is satisfactory. Based on the above findings, the fault can only be found in the relay itself, and the relay should be replaced.3. Method for repairing a fuel pump control to a ground short circuit faultTurn off the ignition, disconnect the fuel pump relay, and measure the resistance between relay slot pin 2 and the engine ground point. If the resistance value is less than 9MQ, the excitation line has been short-circuited to the ground. If the resistance value is greater than 9MQ, the line is in good condition. The short-circuit point must be located within the relay, and the relay must be replaced.4. Fuel pump control open-circuit fault repair methodCheck to see if the appropriate fuses and fuel pump relays are properly installed, dirty, or broken. When no fault is found, remove the fuel pump relay and measure the voltage between pins 1 and 3 of the fuel pump, as well as the engine grounding (i.e. check the power supply of the relay). If the measured voltage is less than 11.5V, it means that the wire connecting the detection point to the battery is broken. If the measured voltage is greater than 11.5V, the voltage supply is functioning normally. The relay actuator and fuel pump should then be checked. If the fuel pump still does not work, the fault is not with the relay. It should keep checking the line between the relay and the fuel pump. If the problem persists after removing the line fault, the fault can only be in the fuel pump, which should be replaced: If the fuel pump is powered on after bridging 1 and 5 Pins, the fault is limited to the active part of the relay and the relay itself, and the detection method is the same as 1" Maintenance method of fuel pump control for Positive pole Short-circuit Fault ".Ⅳ Detection Methods for Faults without Fault Memory of Fuel Pump RelayWhen the detector is used to diagnose the fuel pump executive components, the following three execution results will be obtained. We will examine the three different execution results item by item:1. The fuel pump is turned on and running.In the absence of a fault code, the correct activation of the fuel pump indicates that the system is fault-free.2. When the fuel pump relayis activated, the action of the fuel pump's non-reactive relay indicates that the excitation line is normal. The relay, the positive power supply, and the fuel pump are the three components that must be tested. Pull out the fuel pump relay, measure its slot 1 foot and 3 feet to engine ground between voltage (i.e., check the relay power supply): if the measured voltage is less than 11.5 v, the related testing point between thebattery wire break, if the voltage is greater than 11.5 v, the voltage supply is normal. Checked the oil pump parts, using the transfer line bridge slot on the 1,5 foot: if the fuel pump still does not work, the fault is not in the relay, should continue to check the path of the relay to the fuel pump, still did not solve the problem, after exclusion of line fault, fault can only be in the fuel pump, fuel pump needs to be replaced, if the bridge after 1, 5-foot pump electricity work, illustrates the fault in the relay, the fuel pump relay must be replaced.3. The relays for the fuel pump and the fuel pump are not working, necessitating a thorough inspection of all relevant parts. Check to see if the appropriate fuses and fuel pump relays are properly installed, dirty, or broken. Remove the engine ECU and short-circuit the terminal connecting the engine ECU plug to the fuel pump relay excitation line (pin 2) to ground if no fault is found (for the new Jetta, the corresponding terminal number is 80). If the fuel pump is running at this time (the relay must act), the system from the relay to the fuel pump is functioning normally, and the fault may be in the engine ECU. The phenomenon is the same if the fuel pump is not running and only the relay is activated "The fuel pump relay is turned on.  If both the relay and the fuel pump are not operational, the relay will not function normally even if the engine ECU sends the grounding excitation signal. At this point, the power supply, executive, and excitation parts of the relay must be checked one by one.The method described above for detecting a fuel pump relay can also be used as a guide for detecting other relays. We need to conduct specific analyses for different models during the actual maintenance process.Ⅴ Inspecting the Fuel Pump Relay UnitWhen you open the unit, the first thing you should do is a smell for a faint burnt odor. This would indicate whether or not the temperature has risen too high in there.Next, look for burn marks that indicate an excessive level of resistance. They're usually found near the offending connections or components on the circuit board.Then, place your thumb on the large relay on the circuit board and wiggle it. If the big part of the relay wiggles at all (not the small hinged part), the solder joints are bad and must be re-soldered.Figure 4 bad-solder-jointsExamine the contact points between the relay's hinged and stationary parts. It's difficult to say how much pitting or discoloration is normal, but all of the ones I've seen (including the perfectly good ones) have some pitting. If they're really bad, sanding them may be able to extend their life, but it's impossible to say how much.Check that all of the solder joints on the solder side of the circuit board are smooth and shiny. Poor soldering is indicated by a dull or crinkly appearance.Ⅵ What Causes Fuel Pump Relays to Fail?A fuel pump relay failure can occur for a variety of reasons, including:1The relayshave windings that can be burned due to high voltage short circuits.2A faulty relay is caused by a faulty coil or faulty connections.3Any unfavorable situation, from environmental dust to a sudden voltage increase, can harm the fuel pump relay.4Failure of the relay may occur due to the breaking of inner terminals, corrosion around the electrical contacts, breaking of coil wires, and other factors.5Overheating of the relay may cause it to melt. A burned relay may also cause a meltdown in the fuse panel. It is frequently difficult to remove, and as a result, the entire fuse box must be replaced.l?6When there are a lot of electrical failures, the fuel pump usually wears out at the same rate.7Before you replace the relay, you must first identify and resolve the issue that caused it to fail.8The electric fuel is powered solely by the engine, not by the fuel pump relay. By remaining submerged in the fuel, the relay only keeps the fuel temperature cool.9Keep your fuel tank full at all times to avoid shortening the life of your fuel pump relays.10When you turn off your vehicle's engine with a low fuel level, the engine can drain from the priming chamber into the fuel delivery system.11Without enough fuel, thefuel pumpwill run hot and unprimed, potentially damaging the pump motor. As a result, when the tank is full of gas, a fuel pump relay turns off.12The engine should not be started if the fuel pump relay is still hot.13Parking one's car on the front porch in the sun is a common blunder. It heats the engine, causing the fuel pump relay to backfire. Finally, it takes time for the vehicle to start and for the fuel to cool.14The relays have a winding that is frequently burned due to the high voltage. When the relays burn out or become damaged, they must be replaced.15Because the fuel pump relay controls the fuel pump, any fault with the relay can cause problems with the pump, causing the vehicle to drive incorrectly.Ⅶ How to Prevent Fuel Pump Relay from Getting Damaged after Replacement?Overloading of relays. Every relay has a maximum capacity, and exceeding that capacity may cause the contacts to fail.Figure 5 Fuel pump relay replacementHigh discharged currents may flow from power supplies with capacitors in their outputs. This heats and melts the contacts. Current limiters solve the majority of these issues, but they do not control capacitive discharge effects. They may also take some time to respond because the limiters use a feedback loop as part of the power supply control system.Digital I/O cards such as models 40-411, 40-412, and 40-413 can help to reduce the occurrence of welds caused by faulty test targets.Frequently, an excellent high-quality relay solves the majority of the problems.Keeping the relay clean is also good preventative maintenance. Allow the relay to dry after gently rubbing it with ethanol.Ⅷ How to Diagnose a Bad Fuel Pump Relay?Typically, car problems are caused by faulty fuel pump relays. A faulty relay is the result of a faulty coil or connection. To determine the cause of the bad relay, pull it out of the socket.Figure 6 How to tell if fuel pump relay is badConsult a service manual to locate your fuel pump relay. Before beginning, this task, learn more about how a multimeter or ohmmeter works.Check the Coilstep 1: Set up the multimeter to read the ohms. The ohm scale resembles a horseshoe in shape.Step 2: To test the multimeter, touch the meter leads together. You should get a reading of zero ohms.When the test leads across the relay's coil are touched, they should read around 70 ohms. Assume the meter reads zero or infinite ohms. In that case, the coil is either shorted or open at the same time, and your relay is faulty.Examine the ContactsStep 1: Connect the test leads from one side of the relay coil to the chassis ground.Step 2: Connect the other test lead to the vehicle's battery. The relay should be turned on, and you should hear or feel a click.      5. Connect the multimeter to the relay's COMMON and NORMALLY OPEN contacts, and the relay should read zero. If this does not occur, the contacts are not connected because the relay is faulty.                 6. Exercise caution when connecting your test leads to the battery. If the battery positive is too close to the ground connection, a spark can occur.      7. You will require the following items:Your relay's diagramMultimeterTwo alligator clips on both ends of two electronic test leadsⅨ FAQ1. What could result in a misfire?The engine would not receive the necessary fuel.2. What is responsible for regulating the pressure within the engine?The fuel pump.3. How much power does the main relay provide to the fuel pump relay?12V4. How does the electric fuel pump operate when the ignition switch is turned on?Raise the oil pressure in the fuel main pipe to a safe level before starting the engine5. What happens when the oil pressure on the oil outlet side becomes excessively high?The safety valve opens to drain the fuel6. Where are burn marks usually found?Near the offending connections or components on the circuit board.7. What is the first thing you should do when you open the Fuel Pump Relay Unit?Place your thumb on the large relay on the circuit board and wiggle it8. What can high discharged currents flow from power supplies with?Capacitors9. What solves the majority of the problems?An excellent high-quality relay 10. What do you need to know about a bad fuel pump relay?How a multimeter or ohmmeter works.11. What do you need to do to diagnose a bad fuel pump relay?Set up the multimeter to read the ohms12. What is the reading of a bad fuel pump relay?Zero ohms.

CatalogIntroduction Ⅰ Flysky Transmitter and Receiver1.1 4-channel Flysky Transmitters1.2 Essential Features of Flysky Receivers  Ⅱ RF Transmitter vs RC Transmitter2.1 What is RF Transmitter?2.2 What is RC Transmitter?2.3 Differences between RC and RF Transmitters  Ⅲ Key Points of RC/RF Transmitter and Receiver3.1  How to Bind RC Transmitter and Receiver ?3.2 How to Pair Your RC Transmitter and Receiver?3.3 How to Extend the Range of a RF Transmitter and Receiver?3.4 How do RF receivers Synchronize on a Transmitter's Signal?3.5 8 Tips for Easier RC Transmitter Control  Ⅳ FAQIntroduction A flysky transmitter collects and decodes information, and a receiver displays it in audible and/or visual form for consumers to view or listen to. The radio is the most well-known and oldest invention to use this system.Ⅰ Flysky Transmitter and Receivervideo shows how to bind with Flysky Receivers  - iA6, X6B, iA6B, Fli14+, GT3B, FLIT10 - FS-i6 and FS-i6X Radio 1.1  4-channel Flysky TransmittersFlySky sells 4-channel transmitters, but while a 4-channel TX is adequate for simple RC cars, boats, and planes, a mini quad requires 6 or more channels.Channels 1–4 are used to control the actual movement of the craft, while the remaining channels are delegated to the radio's switches and pots (potentiometers) and are regarded as "Auxiliary Channels," denoted by the letters AUX 1, AUX 2, and so on.Aux channels on a quadcopter can be used to activate different flight modes and control various peripherals such as a lost model buzzer and LED light. With new technology being released regularly, the number of functions and peripherals that we can control from the transmitter grows by the day.Realistically, if you only have 6 channels available, you will quickly feel limited, so we have only included TXs with 6 or more channels.1.2 Essential Features of Flysky Receivers  TelemetryI believe that telemetry was an afterthought for FlySky, and given that most newer FCs come with an integrated OSD, who can blame them if they are focusing sales on the FPV market? In reality, telemetry is one of the 'bells and whistles' I mentioned earlier, and it is by no means required for the beginner.FailsafeAs you can see, there are some sacrifices that must be made when using a FlySky RX to ensure that you have an operational failsafe. Failsafe is probably not as important as the telemetry in an indoor model or a micro you use in the garden, but it is far more important. For some reason, the best RX FlySky makes for larger models (the FS-X6B) only offers a failsafe on the older PWM protocol, which is in my opinion absurd.As you can see, failsafe is not always available over specific protocols, depending on the RX. Failsafe is far more important than telemetry because it reduces the possibility of unexpected behavior in the event that the RX signal is lost. Take the time to ensure you're using a failsafe protocol!Ⅱ RF Transmitter vs RC Transmitter2.1 What is RF Transmitter?An RF transmitter is a type of electronic device that uses an antenna to convert analog signals to digital signals. They have an embedded storage memory that aids in the storage of information, which is then converted by an RF receiver as required by the user. RF transmitters operate at various frequencies, allowing signals to be transmitted at the desired frequency range. They are primarily used in a variety of applications ranging from electronic toys to telecommunication devices and satellites.2.2 What is RC Transmitter  ?2.4GHz radio control transmitters (TX) for all RC applications. Stick and wheel transmitters are available from Etronix and are suitable for use in automobiles, aircraft, boats, and drones.2.3 Differences between RC and RF Transmitters  RC stands for “radio control”.RF stands for “radio frequency”.A radio frequency is used by radio control transmitters to transmit a signal. Radio frequency is used by TV and radio stations to transmit a different type of signal.Radio frequency is a very broad term that refers to electromagnetic signals with frequencies ranging from 100kHz to 100GHz. Radio control is a subset of radio frequency usage.Ⅲ Key Points of RC/ RF Transmitter and Receiver3.1 How to Pair your RC Transmitter and Receiver?Most modern RCs use 2.4 GHz TX and RX that must be paired in the same way that a Bluetooth device is paired with a computer or phone. The RX  has a couple of pins that are connected by a special binding plug. A bind button or switch is located somewhere in the TX. By shorting two pins, you can activate the RX while the TX is in bind mode. When the bind is complete, the LED will usually flash quickly and then glow steadily, and the RX will respond to stick motions. The bind plug is then removed from the RX, and the RX will begin listening to your receiver once it detects its unique transmitting protocol.When the TX is turned on, it will first listen for an available channel before transmitting on it, while the RX will scan channels until it hears the transmitter to which it has been bound. There is usually a brief "boot up" period before the link is established, lasting about a second. Although it is still legal to use old equipment such as crystals and frequency control boards, they are largely obsolete.3.2 How do You Increase the Range of an RF Transmitter and Receiver?Several ways are available.Increase the power of the transmitter. This is not always legal.Utilize a single sideband (SSB) AM modulation scheme to direct more power to a transmitter signal (legally).For the transmitter and receiver, use a lower frequency carrier. Longer wavelengths frequently have a greater range than higher frequencies.Use a higher modulation percentage to produce a signal that is easier to decode at the receiver.Tune the transmitter antenna if it is not already well-tuned. Use a better ground plane if possible, or place the transmitter closer to a natural ground plane.Raise the transmitter antenna's height above the ground.Utilize a directional antenna with gain pointing in the direction(s) of the intended receivers.Extend the range beyond-line-of-sight by utilizing ionosphere reflections. This is not always reliable because it is affected by natural ionosphere changes.Utilize a repeater at a point halfway between the transmitter and the receiver. This could be anywhere, including a mobile device, a mountain top, a tall building, or even a satellite.Raise the height of the receiver antenna above the ground.Install a better ground plane or place the transmitter near a natural ground plane, such as a lake.Use a directional receiver antenna that is pointed in the direction of the desired transmitter and is tuned to the correct frequency.Use a receiver with a higher gain, lower noise, and greater sensitivity.Use a digital data encoding strategy with data correction capability, a more robust, slower transmission data encoding scheme with multiple, redundant transmissions, and a receiver capable of decoding and error-correcting that data.Utilize multi-band transmission to compensate for poor radio propagation conditions.3.3 How do RF Receivers Synchronize on a Transmitter's Signal?Synchronization is usually accomplished in stages.Step 1 Align the frequencies of the transmitter and receiver. In the days before synthesized oscillators, improving frequency stability required some serious engineering. Typically, the last resort was some form of automatic frequency control, or AFC, which used a pilot carrier that was transmitted alongside the actual information carrier.Step 2Advances in frequency control enabled the AFC to be removed from many applications. Today, most frequency error correction is done in the demodulator circuit.Step 3Demodulate the information bits carried by the modulated wave. This results in demodulated data, which can then be analyzed for patterns or embedded clock information.This data is used to adjust the phase of a locally generated clock signal so that it corresponds to the data elements received.In some implementations, clock recovery information is embedded in the data itself, whereas in others, special patterns or bit sequences are dedicated to clock recovery.Step 4 Properly align the data streams with the demodulator so that the actual information can be retrieved, a process known as "data" or "frame" synchronism. 3.4 How to Bind RC Transmitter and Receiver ?Most RC transmitter manufacturers provide pre-programmed transmitters for their respective receivers. However, if you need to replace the components, you can do so by following these steps. The tools you'll need include an accessible receiver, a charged battery in the model, and charged batteries in the transmitter.Syncro System (Kyosho)The Syncro system is commonly used in a variety of models such as the Fazer Rage, Fazer Tl drift car, Outlaw Rampage, and many others. The binding tick requires you to hold down the bind button while powering up the model.You'll notice the transmitter LED flashing quickly. Then, before releasing the bind button, turn on the transmitter. The receiver LED will then re-light to ensure that the process is complete.TQi Top Qualifier (Traxxas)Another ultra-ergonomic high-performance system was found on the Merc G500. Roveris Traxas' radio is TEXAland Roveris Traxas. To rebind this radio, press and hold the red setbutton on the top of the RC transmitter while turning it on; the led should gradually flash red.You can seat the release button at the same time. Press and hold the link button on the receiver end while turning on the speed controller. Finally, when it is powered up, you can let go of it. You can take it for granted if you notice the receiver and transmitter lights turn green.Tactic TTX300 Binding (Axial)This transmitter and receiver system is found on the RTR Axial SCX10il. To bind this, turn on both the receiver and the transmitter, as well as the RC car.Then, on the receiver's box, press and hold the link button. You must press and hold it until it turns red, just before it turns off. Finally, its receiver LED will flash once before returning to a steady state.3.5 8 Tips for Easier RC Transmitter Control  Although most transmitters provide adequate grip and comfort, there are a few tricks you can use to improve them. Improving grip can improve how well you drive your vehicle, which is a definite advantage if you like to compete. Here are a few RC Transmitter Control  tricks that you can use to gain an advantage over your competition.STEERING WHEEL MODS Tennis Racket Grip Tape Wrapping the transmitter's grip with tennis racket grip tape will help wick away any moisture created by your hand, reducing the the'slip' factor. As a result, the transmitter is easier to hold without fear of dropping it. You won't have to grip as tightly, which will reduce hand fatigue. Furthermore, because the tape is thin, it will not change the size of the transmitter grip. This is a plus if you like the size and feel of the stock transmitter in your hand. You can also choose from a variety of colors for the grip tape, which will help you identify your radio.Steering wheel changeAftermarket steering wheels are available from companies such as Duratrax, Hot Racing, and Dynamite if your steering wheel is worn or you want to try something different. Not all foam is the same, and you may find one that suits you better.Improved GripThere are also steering wheel grips that can be added to improve control and reduce fatigue. Pro Grips from Xtreme Racing are designed to fit over your existing steering wheel. The scallop shape gives your fingers a place to rest, and the grips don't require glue to stay in place.Drop Down Kit The manufacturer of your transmitter may offer a drop down steering wheel kit. These kits lower the steering wheel so that your hands are in line with each other, which may be a more comfortable position for you.Trigger Tricks 1.I've discovered that some triggers are so smooth that your finger can slip off of them. Fix this with a wrap of racket grip tape.2. A length of fuel tubing is an easy fix for triggers that don't provide a tight feel for your finger, which can impair braking responsiveness. To help close the opening for your finger, slide the fuel tubing over the forward section of the trigger. This trick will also increase the friction on your finger.Self-adhesive FoamIf you want to make the grip larger and/or contour it to your hand, some self-adhesive foam can help. It may take some trial and error to get it exactly how you want it, but it is worth the time to get it right. Once in place, cover it with grip tape to make it more secure.Optional GripsIf you read the instruction manual for your transmitter, you will most likely discover that the manufacturer provides optional transmitter grips. They are typically available in larger or smaller sizes than stock and are simple to install on the transmitter.Ⅳ FAQ1. Are Flysky transmitters any good?A cost effective and overall great product. The transmitter feels a little cheap, but its performance works just as advertised. ... Overall, I say this product is a good buy. It's simple and relatively cheap (compared to other models), but performs great!2. Can you use any transmitter with any RC car?Yes, RC transmitters and receivers are interchangeable, so that you can use transmitters and receivers of different brands, and they will work perfectly.3. Is FlySky and Frsky the same?In my view, the components of the frsky stations have a much higher quality than the flysky ones. ... But if yours is going to fly more continuously, you are looking for reliability because you already have a more serious and more expensive model, I recommend that you acquire a Horus or taranis type frsky station.4. What is the range of a 2.4 Ghz RC transmitter?about 300 feetThe 2.4GHz version of the HumRC Series is about 300 feet (90m) for remote control applications.5. Are FlySky and Spektrum compatible?But Spektrum transmitters cannot talk to FlySky receivers - ever. ... But Spektrum transmitters cannot talk to FlySky receivers - ever. Spektrum transmitters require receivers that use the DSMX or DSM2 algorithms. You need the Spektrum AR610 receiver (or equivalent) in order to bind with your Spektrum DX6 transmitter.6. Is FlySky compatible with DSMX?You would need to put a Spektrum compatible RF module in the FlySky transmitter. ... If the flysky uses the spektrum dsm2/dsmx then yes.7. Does FlySky have telemetry?Spare receiver for the FlySky i6 Transmitter. ... Voltage telemetry built in when paired with the i6 transmitter. This receiver features dual antennas for optimal performance and no fear of interference.8. Is Flysky GT5 waterproof?The gyro function is surprisingly valuable in both and you can get a bunch on amazon real cheap. however, I recommend using some conformal coating or corrosion -x as they are not waterproof. I use the FS-GT5 with the FS-BS6 receivers and they work great in my cars and in my boat.9. Can you bind any transmitter to any receiver?You can use a transmitter with any receiver. BUT you have to have a way of changing the antenna when you transmit. There are antenna relays for this purpose that will automatically make the change for you. The power of the transmitter would quickly destroy your receiver. 

IntroductionⅠ What is the Backlit Keyboard? 1.1 Advantages of the Backlit Keyboard 1.2 Disadvantages  of the Backlit KeyboardⅡ How to Enable and Disable a Backlit KeyboardⅢ Compact Backlit Keyboard w/Force Sensing Resistor (USB) (Black) | SLK-79-FSR-USB by iKey    3.1 How Does a Force Sensing Resistor (FSR) Work?    3.2 How do Force Sensing Resistors Measure Force?    3.3 How do You Calibrate a Force Sensing Resistor?    3.4 How are Force Sensing Resistors Made?    3.5 Matrix or Single-Point Force Sensing Resistors    3.6 How are Force Sensing Resistors Used?Ⅳ Factors to Consider Before Purchasing a Backlit Keyboard    4.1 Price    4.2 Increased Power Usage    4.3 Brightness    4.4 RGBⅤ How Much does a Backlit Gaming Keyboard Cost?Ⅵ Frequently Asked Questions about Backlit KeyboardIntroductionThe term "backlit keyboard" refers to a keyboard that has a light beneath the keys. In low-light situations, the backlight illuminates the letters and symbols on the keys to make them visible. Because the print on the keys is semi-transparent, the light will pass through it like a window. Read this article to learn how to choose a backlit keyboard quickly.Video: Backlight KeyboardsⅠ What is the Backlit Keyboard?A backlit keyboard, also known as an illuminated keyboard or a backlit gaming keyboard, is one that has lights inside it. The lights illuminate the area behind and around the keys, making them visible in low-light or dark settings. For energy efficiency and increased brightness, the light source is typically made up of mini LED light bulbs. Backlit gaming keyboards are popular among computer gamers, but they can also be used for general computing tasks. G.SKILL 's multicolor backlit gaming keyboard is shown below. 1.1 Advantages of the Backlit KeyboardThe distinction between a backlit keyboard and a regular keyboard is that the backlit keyboards can be used in the dark because they are illuminated from behind the keys.The characters associated with each key on regular boards are simply printed on and do not light up. Backlit keyboards  are therefore the most versatile option.You may have one or more colors depending on the keyboard supplier and model.A colorful backlit keyboard is a way to go for the gamer or the person who wants to add a little flair to their computer hardware setup.While these keyboards do have a more youthful feel to them, they are suitable for anyone who is young at heart.In general, the F and J keys have raised lines on them if you look at your keyboard (you may have to feel your keyboard).It's supposed to help you navigate the board even when the lighting isn't ideal.To work properly, you must, of course, know how to type efficiently and not just with your pointer finger (aka index finger).Some argue that efficient backlighting is the answer.Laptops with lights can be both functional and attractive.Learn more about illuminated keyboards as the ultimate gaming, editing, or programming accessory. 1.2 Disadvantages of the Backlit KeyboardFigure 1 Backlit keyboardThey cost more than other types of keyboards. Most models with key lighting start around $800 and rise from there - sometimes dramatically.Illuminated keyboards use more energy than standard keyboards. It can drain your battery faster if it is not plugged in and charging.Ⅱ How to Enable a Backlit KeyboardTouching the keys or across the edge of the keyboard usually activates the backlit feature. When the keys or keyboard edges are not touched, the lights automatically turn off after a short period of time. Turning off the lights automatically helps to conserve battery energy, extending battery performance between charges.Backlit keyboards for laptops and desktop computers may also include special keys or FN keys for permanently turning the backlight on and off, as well as the ability to change the color. The special or FN key to press on a keyboard varies depending on the manufacturer of the keyboard or laptop.In the Windows Mobility Center, most new PC laptops allow you to change the backlighting on the keyboard. On Dell laptops, this is frequently Fn+F10 or simply F10. Fn+Spacebar is the hidden key for adjusting the backlit keyboard  on Lenovo laptops.Ⅲ Compact Backlit Keyboard w/Force Sensing Resistor (USB) (Black) | SLK-79-FSR-USB by iKeyThe SLK-79-FSR-M keyboard was created for mobile applications that require a small footprint. The SLK-79-FSR-M, which includes an integrated force sensing resistor pointing gadget with dual left-click capability, packs a lot of power into a small package. The SLK-79-FSR-M includes backlit keys for working in low-light environments. The SLK-79-FSR-M, like the other iKey keyboards, has sealed industrial silicone rubber keypads and sturdy ABS polycarbonate cases.Features:12 Keys for FunctionPointing Device With Integrated Force Sensing ResistorKeyboard with Red BacklightConfigurations for USB and PS/2 are available. 3.1 How Does a Force Sensing Resistor (FSR) Work?In recent years, printed, thin, and flexible sensors have created quite a stir in the design engineering community. This is largely due to the proliferation of smart, lightweight, and energy-efficient technologies that have become ingrained in our daily lives. Naturally, when designing these small but powerful devices and products, the embedded components that make them game-changers should share the same characteristics.Force sensing resistors (also known as printed force sensors or force-sensitive resistors) are a large and expanding class of embedded components, with many new sensor types introduced in recent years. Force sensing resistors    , on the other hand, are not a new technology. For decades, force-sensing resistors have been used as an embedded component.3.2 How do Force Sensing Resistors Measure Force?Most engineers know that the formula for force is an object's mass multiplied by its acceleration (or, F=M*A) or applied pressure multiplied by contact zone (F=P*Area). Newtons (N), pound-force (lbf), and other engineering units are used to represent "F" in these equations.Figure 2: When a force sensing resistor is applied, the conductance response as a function of force is linear.Pressure sensor resistors are not pre-calibrated to correlate a force reading to a known technology unit on their own. The force measurement result captured by a force sensing resistor. On the other hand, can be correlated to the applied force via a calibration procedure.Piezoresistive sensing technology is a force-sensing resistor, This means that they are passive elements that serve as variable resistors in an electrical circuit. As illustrated in Figure 1, when the sensor is unloaded, it has a high resistance (on the order of Megaohms (M)) that decreases as force is applied (usually on the order of Kiloohms (K)). When the inverse of resistance (conductance) is considered, the thermal conduction response as a function of force is linear within the sensor's specified force range.3.3 How do You Calibrate a Force Sensing Resistor?Force sensing resistors  can really be calibrated with as few as two-to-three known loads due to their resistance/conductance linear relationship.Furthermore, if the circuit is built with adjustable components, the sensor's sensitivity can indeed be adjusted for optimal performance in the specific force range.3.4 How are Force Sensing Resistors Made?A semi-conductive material – or semi-conductive ink – is sandwiched between two thin substrates to form force-sensing resistors. As illustrated in Figure 3, there are two types of force sensing resistor technologies: Shunt Mode and Thru Mode.Figure 3:  The differences between shunt and thru mode force sensing resistor technologies.Force sensing resistors  in the shunt mode are polymer thick-film devices made up of two membranes separated by a thin air gap. One membrane contains two sets of interdigitated traces that are electronically isolated from one another, while the other is coated with a special textured, resistive ink.Thru mode force-sensing resistors  are flexible printed circuits with two outer substrates of polyester film. Above and below a pressure-sensitive layer, silver circles with traces are positioned, followed by a conductive polymer. The two layers of the substrate are laminated together with an adhesive layer. 3.5 Matrix or Single-Point Force Sensing ResistorsFigure 4: Examples of different force sensitive resistor technologies.ForceSensing resistors  can be configured as single-point force sensors or as a matrix array to capture pressure distribution over a large area. Pressure mapping technology refers to the use of force-sensing resistor  matrices.Tekscan's FlexiForceTM sensors are a type of thru mode force-sensing resistor. This technology's flexibility, combined with its operating capabilities and ability to operate on simple circuitry, makes it an excellent choice for embedding into smart devices with limited space and power. FlexiForce sensors are also extremely adaptable. Size, shape,  electrical termination, electrical termination, sensitivity,  and operating temperature can all be customized to meet the needs of your application. 3.6 How are Force Sensing Resistors Used?While there are new applications for force-sensing resistor technology every day, the majority of them fall into one of four categories:Detecting or measuring the rate at which a force changes.Detecting or measuring a change in force relative to another object.Touch and/or contact detectionDetecting force thresholds to initiate some kind of action (e.g., IoT applications)This short video gives you a better visual understanding of the various applications for force sensing resistors, specifically FlexiForce force sensing resistors.Are you interested in purchasing force sensing resistors? Ⅳ Factors to Consider Before Purchasing a Backlit KeyboardBefore purchasing a system with a backlit keyboard, you should think about a few things. The following sections go over each of them:4.1 PriceBacklit keyboard laptops are significantly more expensive than those without. As a result, it is recommended that you only invest in a feature if you are certain that it will benefit you and improve your user experience. It is recommended that you skip this feature if you rarely use your computer in dimly lit environments or if you can type without looking. 4.2 Increased Power UsageYour battery  percentage will quickly be depleted by backlit keyboard  s. As a result, if you value durability over aesthetics, you should avoid purchasing a laptop with a backlit keyboard,  However, if you don't mind having your system plugged in the majority of the time, the reduced battery  life shouldn't be a big deal. Furthermore, if you purchase a laptop with a backlit keyboard.  you can turn the feature on or off according to your needs.4.3  BrightnessOne of the main benefits of purchasing a laptop with a backlit keyboard  is the ability to use your system effectively in dimly lit environments. As a result, you should make sure that the backlit keyboard on your laptop is bright enough to meet your needs.4.4  RGBIf you're convinced that a backlit keyboard is a must-have feature for your ideal laptop, then go for the best that the market has to offer. When purchasing a laptop with a backlit keyboard, make sure that the keyboard can switch between different color ranges to effectively adapt to your surroundings.Ⅴ How Much does a Backlit Gaming Keyboard Cost?Gaming keyboards with backlighting are more expensive than standard keyboards, costing around $90 or more. They come in both wired and wireless versions. Wireless models require batteries to operate and may include a USB cable for charging the batteries by plugging the keyboard into the computer.Backlit gaming keyboards are made by a variety of companies, the most popular of which are Corsair, G.SKILL, Logitech, and RAZER.Ⅵ Frequently Asked Questions about Backlit Keyboard6.1 Are there wireless backlit keyboards?These keyboards are wireless and have backlit keys together. ... With backlit keys you are able to work in dark or dim light surroundings whereas wireless connectivity allows you to get free of all wires. Wireless keyboards mostly use bluetooth and are battery powered.6.2 Does backlit keyboard drain battery?Powering the keyboard backlights is a lesser drain on the battery, but there's a built-in setting that I recently learned about that turns off the keyboard backlights after a period of inactivity too.6.3 Does LED keyboard consume more power?There is no difference between the amount of energy/electricity usage a light up/LED keyboard will use compared to a non-light/non-LED up keyboard.6.4 Can you buy a backlit keyboard?Keyboards do come in a variety of different sizes, configurations, and builds, but these don't influence whether the keyboard has a backlight. Both membrane keyboards and mechanical keyboards may be built with backlights. Also, backlights are integrated into both desktop keyboards and laptop keyboards.6.5 Does Microsoft make a backlit keyboard?Yes, it does!all Surface Laptop 3 models come with the same three levels of the backlit keyboard. You can control the backlit on the Surface Laptop 3 keyboard by pressing the F1 media key (Next to Esc key). 1st Press: Activate backlight at level 1 (min). 2nd Press: Activate backlight at level 2 (medium).6.6 Does the surface laptop 2 have a backlit keyboard?Surface Laptop 2 keyboard and trackpadThe Surface Laptop 2 features a full-sized chicklet style keyboard with 1.5 mm of travel (versus 1.3 mm in Surface Pro 6) and three-stages of backlighting.6.7 Does HP laptop have backlit keyboard?Many HP laptops have backlit keyboards, some just a single color, others with what's known as RGB lighting, that can be customized to show different colors.6.8 Does ASUS have backlit keyboard?Here you can learn more about ASUS keyboard hotkeys introduction. For part of Notebook models, backlit function key is F3 and F4 key . If they are available, they can enable the backlit by pressing FN and F4 keys (FN+F4 keys) at the same time. ... For Gaming Notebook models, it's generally on Up and Down keys.6.9 How do I make my laptop keyboard glow?Also, depending on your computer model, your PC may be configured to control the backlit keyboard via the F9 or F11 button rather than the F5 button. Practice the same simultaneous Fn + F11 operation to turn on a backlight keyboard light.

CatalogⅠ IntroductionⅡ DC Power Supply2.1 What is a DC Power Supply?2.2 Types of DC Power Supply2.3 Composition and Operation2.4 Specifications 2.5 Features2.6 Frequently Asked Questions About DC Power SupplyⅢ 5V DC Power Supply3.1 What is the 5V DC Power Supply?3.2 Typical Applications for 5V DC Power Supplies 3.3 Frequently Asked Questions About 5V DC Power SupplyⅣ 12V DC Power Supply4.1 What is the 12V DC power supply?4.2 Typical applications for 12V DC power supplies4.3 Frequently Asked Questions About 12V DC Power SupplyⅤ 24V DC Power Supply5.1 What is the 24V Power Supply? 5.2 What is a 24V Power Supply Used for?5.3 24V Power Supply Requirements & Considerations5.4 What are the Features of a 24V Power Supply?5.5 24V Power Supply Vs. 36V Power Supply5.6 24V Power Supply Problems & Resources5.7 Frequently Asked Questions About 24V DC Power SupplyⅥ Differences Between DC and AC Power Supplies6.1 Characteristics of DC Power Supply6.2 Characteristics of AC power supply6.3 AC Power Supply Vs. DC Power SupplyⅦ How to Choose the Best DC Power SupplyⅠ IntroductionAny electronic system relies on power, and the power supply is what keeps it running. Choosing the correct source can be the difference between a gadget that performs at its best and one that produces inconsistent results. DC to DC converters are available in addition to alternating current (AC) to direct current (DC) power sources. If your system already has DC, a DC to DC converter may be a better design option than the AC mentioned below. There are two types of direct current power supplies: unregulated and regulated. There are various types of regulated supply, including linear, switching, and battery-based. How to Use a Power supplyⅡ DC Power Supply2.1 What is a DC Power Supply?An AC-to-DC converter takes an AC input voltage and converts it to a DC output voltage. The output voltage may contain substantial or negligible quantities of AC frequency components known as ripple voltage, which are connected to the AC input voltage frequency and the power supply's performance, depending on the application requirements. A DC-to-DC converter is a DC power supply that operates on DC input voltage. How to Use a DC Power Supply 2.2 Types of DC Power SupplyThere are mainly four types of DC power supplies: Linear power supply, Switched-mode power supply, Capacitive (transformerless) power supply, Linear regulator. Linear power supplyThe AC input voltage in a linear power supply flows via a power transformer before being rectified and filtered to produce a DC value. Filtering, which can be as simple as a single capacitor or as sophisticated as a pi filter, reduces the amplitude of AC mains frequency present in the rectifier output. The quantity of filtering required by the power supply is determined by the electric load's tolerance for ripple. In other cases, ripple can be completely ignored. In some battery charging applications, for example, the power supply is comprised of a transformer and a diode, with a simple resistor placed at the power supply output to limit the charging current. Figure 1: Simplified block diagram of a programmable linear power supply Switched-mode power supplyThe AC mains input is directly rectified and then filtered to obtain a DC voltage in a switched-mode power supply (SMPS). Electronic switching circuitry switches the resulting DC voltage on and off at a high frequency, producing an AC that passes via a high-frequency transformer or inductor. Switching occurs at a very high frequency (usually 10 kHz — 1 MHz), allowing smaller, lighter, and less expensive transformers and filter capacitors to be used than in linear power supply running at mains frequency. The high-frequency AC is rectified and filtered after the inductor or transformer secondary to create the DC output voltage. The output will be electrically isolated from the mains if the SMPS uses a properly insulated high-frequency transformer; this feature is typically required for safety. Switched-mode power supplies are typically regulated, and a feedback controller monitors the current drawn by the load to keep the output voltage constant. As the power output requirements increase, the switching duty cycle increases. To assist safeguard the device and the user from injury, SMPSs often include safety measures like a current limitation or a crowbar circuit. When a switched-mode supply detects an abnormally high-current power draw, it can presume it's a direct short and shut down before any damage is done. When anomalous supply voltages are present, PC power supplies frequently transmit a power good signal to the motherboard; the absence of this signal prohibits operation. The minimum current output of some SMPSs is set to an absolute maximum. They can only produce electricity above a certain threshold and are unable to function below that threshold. The frequency of the power slicing circuit climbs to a high rate in a no-load condition, leading the isolated transformer to operate as a Tesla coil, causing damage due to the very high voltage power spikes that result. When no load is detected, switched-mode supply with protection circuits may momentarily turn on before shutting off. To allow the supply to run without a primary load, a very modest low-power dummy load, such as a ceramic power resistor or a 10-watt light bulb, can be connected to it. Computer switch-mode power supplies have traditionally had low power factors and have been substantial sources of line interference (due to induced power line harmonics and transients). The input stage of a simple switch-mode power supply can distort the line voltage waveform, causing problems for other loads (and poor power quality for other utility customers), as well as excessive heating in wires and distribution equipment. Customers also pay more for electricity when they use lower power factor loads. Some computer switch-mode power supply conducts power factor adjustment and may use input filters or additional switching stages to prevent line interference to avoid these issues.  Linear DC Power SupplySwitching DC Power SupplySize and WeightLarge transformers are required, which add significant size and weight.If necessary, higher frequencies allow for considerably smaller transformers.EfficiencyTransformer losses are the only important causes of efficiency loss if the system is not regulated. High-power uses, if regulated, will have a significant impact on efficiency.Because they behave like minuscule resistances, transistors have low switching losses. This makes it possible to run high-power applications efficiently.NoiseVoltage ripple can create significant noise in unregulated power supplies, while regulated linear AC DC power systems can have very low noise. They're useful in medical sensing applications because of this.Transistors that switch very quickly produce noise in the circuit. For audio applications, this can be filtered away or the switching frequency can be made exceedingly high, above the limit of human hearing.ComplexityIn comparison to switching DC power supplies, linear DC power supplies feature fewer components and simpler circuits.Because of the additional noise generated by the transformers, massive, complex filters, as well as control and regulation circuitry for the converters, are required. Capacitive (transformerless) power supplyA capacitive power supply (transformerless power supply) reduces the mains voltage to a lower AC voltage by using the reactance of a capacitor. The lowered AC voltage is then typically rectified, filtered, and controlled to produce a steady DC output voltage. The mains voltage is not isolated from the output voltage. As a result, anything connected to the power source must be properly insulated to avoid exposing people and equipment to dangerous high voltage. The voltage reduction capacitor must be able to resist full mains voltage and have sufficient capacitance to handle maximum load current at the rated output voltage. These limits, taken together, limit the practical applicability of this sort of supply to low-power applications. Linear regulatorA linear voltage regulator's job is to convert a fluctuating DC voltage into a fixed, frequently precise, lower DC voltage. They also frequently have a current limiter to safeguard the power source and load from overcurrent (excessive, potentially destructive current). Many power supply applications require a constant output voltage, however the voltage produced by many energy sources varies with changes in load impedance. Furthermore, if the energy source is an unregulated DC power supply, the output voltage will fluctuate with the input voltage. To avoid this, some power supplies use a linear voltage regulator to keep the output voltage constant, regardless of input voltage or load impedance variations. Linear regulators can also lower the magnitude of output voltage ripple and noise. 2.3 Composition and OperationA common DC power supply will be used to demonstrate the general construction of a power supply. As illustrated in the diagram, a basic DC power supply can be constructed using four circuits (or sections), with each block representing a single circuit that performs a certain function. Figure 2: Electrician Training - Integrated Publishing Transformer - The transformer's input is often an AC signal created by a line voltage, such as power from an electric outlet. The primary function of the transformer is to step down (lower the amplitude) or step up (raise the amplitude) the signal to create the necessary DC level at the power supply's output. The transformer can also be used as an isolator. In many applications, it's critical to separate the input AC signal from the device's internal signals. Rectifier - The rectifier receives the signal from the transformer's output. A rectified pulsing DC signal is provided by this device. A half-wave rectifier or a full-wave rectifier can be used. A pulsing DC signal is a voltage or current signal that does not change polarity but has a time-dependent magnitude. Diodes and resistors are commonly used in rectifiers. Filter - A filter is required to transform a pulsing DC signal into a non-pulsating DC signal. In most cases, a simple capacitor filter is sufficient. The filter's output is DC voltage, which typically contains some ripple and slight AC changes. Regulator - The regulator serves two purposes:(1) to smooth the signal from the filter, resulting in a DC signal with no ripples;(2) to maintain a constant voltage at the output.Regardless of changes in the input voltage or the load, the voltage at the regulator's output remains constant (not shown in the diagram). The conversion of a 115 V(RMS) signal to a constant 110 V(DC) voltage is shown in the accompanying image to demonstrate the four steps or blocks required to create a DC voltage from a line voltage. Figure 3: Electrician Training - Integrated Publishing 2.4 SpecificationsMany parameters are required to completely characterize a power supply; nevertheless, there are a set of parameters that are common to most power supply types. Input and output voltages (in volts [V]), output current (in amps [A]), rated output power (in watts [W]), input signal frequency (in Hertz [Hz], kilohertz [kHz], or megahertz [MHz]), and regulation are all examples. Input voltageis the magnitude and type of the voltage applied to the power supply.Input frequencyis the frequency of the input signal.Output voltageis the magnitude of the DC voltage at the output of the device.Output currentis the current associated with the output voltage.Output poweris the power (in watts) delivered to the load.Regulationindicates the stability of the output voltage.Line regulationis the maximum steady-state amount that the output voltage changes as a result of a specified change in input line voltage.Load regulation is the maximum steady-state amount that the output voltage changes as a result of a specified change in load. Mounting requirements are less important, but they should be considered if the power supply is to be appropriately fitted to the application or system. There are several mounting solutions available, including: Board mountCircuit mountWall mountDIN rail mountRack mountDesktop 2.5 FeaturesDC power supplies have extra features like circuit protection and cooling, which might be useful in certain situations. DC power supply' performance and/or physical integrity can be influenced by several factors. Normally, circuits that protect the power supplies are built into the device's design and construction. Here are a few examples: Short circuit protectionOverload protectionOver current protectionOver voltage protectionUnder voltage protectionOver temperature protection Several cooling methods are used to protect DC power supplies: Fan coolingHeat sink coolingWater cooling DC power supplies can also incorporate a number of other features: Battery backupHot swappablePower factor correctionTemperature compensationWeatherproof 2.6 Frequently Asked Questions About DC Power Supply1.What are DC power supplies used for?The main job of an AC/DC power supply is to transform the alternating current (AC) into a stable direct current (DC) voltage, which can then be used to power different electrical devices. Alternating current is used to transport electric power all across the electric grid, from generators to end users. 2.Why is a DC power supply needed?A DC power supply is used by engineers to test a component, circuit or electronic device, such as IoT devices, medical products, mobile phones, and remote industrial sensors. The DC power supply allows engineers to set and supply specific voltages to power the device to confirm it’s working as intended. 3.What is the difference between AC and DC power supply?In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. 4.How do you use a DC power supply?A DC power supply is easy to use. These instruments connect to a device that’s being tested via leads that are inserted into the DC power supply panel. Using the front panel display, engineers can set voltages or current levels to power the device for testing. 5.How does a DC power supply work?A DC power supply works by providing a regulated direct current to power a component, module, or device. Most DC power supplies have two modes of operation. In Constant Voltage (CV) mode, the power supply controls the output voltage based on the user settings. In Constant Current (CC) mode, the power supply regulates the current. 6.What type of power supply reduces the mains voltage to a lower AC voltage?linear voltage regulator 7.What do linear voltage regulators often have to protect the power source and load from overcurrent?current limiter 8.What do many power supply applications require?constant output voltage 9.What happens when the output voltage fluctuates with the input voltage?if the energy source is an unregulated DC power supply 10.What do some power supplies use to keep the output voltage constant?a linear voltage regulator 11.What can lower the magnitude of output voltage ripple and noise?Linear regulators 12.How can a basic DC power supply be constructed?four circuits (or sections) Ⅲ 5V DC Power Supply3.1 What is the 5V DC Power Supply?One of the most prevalent power sources in use today is the 5V power supply (sometimes known as a 5V DC power supply). Using a mixture of transformers, diodes, and transistors, a 5V DC output can be generated from a 50V AC or 240V AC input. There are two types of 5V power supplies: regulated 5V power supplies and unregulated 5V power supplies. Switching regulated AC to DC, Linear regulated AC to DC, and Switching regulated DC to DC are the three types of 5V regulated power supply. 5V DC power supply Switching regulated 5V DC power supplies, also known as SMPS power supplies, switchers, or switched-mode power supplies, use a complicated high-frequency switching technology that includes pulse width modulation and feedback to regulate the 5V DC output voltage. To reduce common and differential mode noise conveyed to the line and load, switching regulated power supply uses significant EMI filtering and shielding. Our 5V DC switchers come with galvanic isolation as standard, giving our customers input to output and output to ground isolation for optimum versatility. Switching regulated power supplies are very efficient, tiny, and light, and come in AC-DC single and wide-adjust output, as well as DC-DC, variants. Our Low Profile broad adjust output switchers are externally programmed and can be voltage or current regulated. A dissipative regulating circuit regulates the output of linear regulated 5V DC power sources. They are exceedingly stable, have very minimal ripple, and do not create EMI due to switching frequencies. Our 5V DC linears come with galvanic isolation as standard, giving our customers input to output and output to ground isolation for optimum flexibility. AC to DC single and broad adjust output linear regulated power supplies are provided. Basic power sources with an AC input and an unregulated 5V DC output are known as unregulated 5V DC power supplies. The output voltage is affected by the input voltage as well as the load. These power supplies are both affordable and dependable. 3.2 Typical Applications for 5V DC Power Supplies Industrial automationTTL circuit powerPrecision control circuitsResearch projects 3.3 Frequently Asked Questions About 5V DC Power Supply1.What does 5V DC mean?DC 5V/2A, means that the input voltage, to recharge the battery is 5 volts of direct current. It has two outputs, one 2.1A USB (for tablets and Raspberry Pi and high-current devices, the other 1A USB for phones and smaller devices. 2.Can I use a 12V power supply on a 5V device?The device will very likely burn out. In addition, depending on what the device is and the capacity of the 12V supply, connecting a 12V supply to a device rated 5V max could lead to a hazard - fire, explosion, etc. Mostly it will get damaged. 3.What is the difference between 5V and 12V?The main disadvantage of the 5V system is that voltage drop is a more significant limiting factor. However 5V systems are much more power efficient than 12V systems; a 5V linear system will always be 2.4 times more efficient than it's equivalent 12V system. Ⅳ 12V DC Power Supply4.1 What is the 12V DC power supply?One of the most prevalent power sources in use today is 12V power supplies (or 12V DC power supplies). A combination of transformers, diodes, and transistors is used to generate a 12V DC output from a 120V AC or 240V AC input. There are two types of 12V power supplies: 12V regulated power supplies and 12V unregulated power supplies. Switching regulated AC to DC. Linear regulated AC to DC, and Switching regulated DC to DC are the three types of 12V regulated power supply. How does a modern Power Supply work? Switching regulated 12V DC power supplies, also known as SMPS power supplies, switchers, or switched-mode power supplies, use a complicated high-frequency switching technology that includes pulse width modulation and feedback to regulate the 12V DC output voltage. To reduce common and differential mode noise conveyed to the line and load, switching regulated power supply uses significant EMI filtering and shielding. Our 12V DC switchers come with galvanic isolation as standard, giving our customers  input to output and output to ground isolation for optimum versatility. Switching regulated power supplies are very efficient, tiny, and light, and come in  AC-DC single and wide-adjust output, as well as DC-DC variants. Our Low Profile broad adjust output switchers are externally programmed and can be voltage or current-regulated. A dissipative regulating circuit regulates the output of linear regulated 12V DC power sources. They are exceedingly stable, have very minimal ripple, and do not create EMI due to switching frequencies. Our 12V DC linears come with galvanic isolation as standard, giving our customers input to output and output to ground isolation for optimum flexibility. AC to DC single and broad adjust output linear regulated power supplies are provided. Basic power sources with an AC input and an unregulated 12V DC output are known as uncontrolled 12V DC power supplies. The output voltage is affected by the input voltage as well as the load. These power supplies are both affordable and dependable. 4.2 Typical applications for 12V DC power suppliesComputer Peripherals and Networking ApplicationsTelecommunications and Fiber optic NetworkVoice, Data and Analog CommunicationsUniversities and Educational FacilitiesInstrumentation and ElectronicsUtility and Power IndustriesData AcquisitionMedicalMilitaryMotor control 4.3 Frequently Asked Questions About 12V DC Power Supply1.How do you make a 12V DC power supply?Things that you will need to make this power supply is:Piece of veroboardFour 1N4001 diodesLM7812 regulatorTransformer that has an output of 14v - 35v AC with an output current between 100mA to 1A, depending how much power you will need. (I found a 16v 200mA transformer in a broken alarm clock.)1000uF - 4700uF capacitor1uF capacitorTwo 100nF capacitorsJumper wires (I used some plain wire as jumper wires)Heatsink (optional) 2.Is 12V AC the same as 12V DC?12V DC is safer than 12V AC. Body resistance decreased when the 12V AC still may cause the dead, 12V DC will not be in 100%. However, the hazard degree of electric shock to the human body mainly depends on the size of the current passing through the human body and the length of the energization time. 3.What is DC 12V input?12V power supply is one of the most common power supplies in use at present. In general, a 12V DC output is obtained from a 100VAC-277VAC input using a combination of transformers,12V power supplies can be of two types: 12V constant power supplies, and 12V unconstant power supplies. 4.Can I use a 9V power supply on a 12V?It depends on whether your power supply is regulated. If you need regulated (stable) 12V, and the 9V supply is unregulated, it could give you up to 14V or slightly higher when not loaded. 5.Can I use a 12V power supply on a 15V?Assuming the polarity is correct, plugging in a 12V input to a device requiring 15V won't do any damage, however if you undervolt an amplifier, you may get clipping or other distortion. 6.How do you convert 12V DC to 6V DC?It's possible to step 12 volts down to 6 volts by incorporating a pair of 10,000-ohm resistors into the circuit. Cut two lengths of wire, and strip each wire of 1/2 inch of insulation at each end. Attach one end of the first wire to the positive terminal on the power supply. 7.Can I use a 19V power supply on a 12V?Any device that was designed to run at 12V is likely to be fried by 19V. It might catch fire, even though it's not very likely. You must have an equal or higher current rating in order to use an AC adapter. Ⅴ 24V DC Power Supply5.1 What is the 24V Power Supply?A power supply with a voltage of 24 volts can convert AC to DC. The voltage level can be modified at the same time as the AC power is converted to DC power. Some gadgets require DC, although they only have access to AC from the wall. This adjustment is simple to do using the 24V power supply. A DC power supply is an economical and effective alternative in locations where AC power is not available. How to Make 24 Volt Power Supply 5.2 What is a 24V Power Supply Used for?A power supply with a voltage of 24 volts can be utilized in a variety of applications. The 24V supply could be a useful solution whenever an object requires power. Although we usually think of a 24V Power Supply as being utilized on a building site or in the workplace, it has a variety of additional uses. A 24V power source is required in many audio and lighting scenarios. In addition, medical and communication difficulties may necessitate the usage of a 24V power supply. Power supplies are usually compact and can be a relatively portable solution to a problem. The 24V power supply has a wide range of applications. 5.3 24V Power Supply Requirements & ConsiderationsThere are various factors to consider while selecting a 24V Power Supply. Check to see if the device you need to power is compatible with the power supply you buy. Input Voltage & Output VoltageThe output range of a power supply will vary substantially depending on the input voltage. You'll need to make sure you get a 24V power supply with the right voltage range. The longer the range, the more expensive the device will be in general. Power RatingWatts will be used to determine the power rating. Some of the smaller units will have an output of around 80 watts, while the larger ones will be closer to 1000 watts. Keep in mind that certain 24V Power Supplies are designed for light-duty industrial use, while others are designed for heavy-duty industrial use. Make sure you get a power source that meets your requirements. 5.4 What are the Features of a 24V Power Supply?To get the most out of your equipment purchase, it's critical to grasp the features of a 24V power supply. The many output ports and the consistent power supply are three things to be aware of. The 24V power supply's combination of qualities is what makes it so beneficial to its users. Multiple Output PortsThe majority of the 24V power supply includes many outputs. In most cases, one output is insufficient to complete the task. Consider setting up audio equipment with the 24V power supply. One output, without a doubt, will not suffice. The majority of 24V power supplies will offer two or three options. When there are many output ports, you should be able to specify voltage restrictions and even timings to help you regulate whatever is attached to the output ports. Overall, if you're going to buy a 24V power supply, you should go for one that has numerous output ports. ProgrammableMany of the 24V power sources on the market today can be programmed. This implies you can use them with a computer system for product setup and testing. This is critical for medical applications as well as light and audio. With higher-end equipment, the programmability of the 24V power supply will become more sophisticated. Some of the basic programmability is simple enough for a layperson to understand. Constant Voltage Power SupplyA 24V power supply can be mounted to provide backup power to a region that isn't getting enough power. On your power supply, you can choose the required voltage and maximum current for the load. The 24V power supply is an excellent choice in circumstances where steady power is required. Many users consider these to be extremely valuable and dependable pieces of gear. 5.5 24V Power Supply Vs. 36V Power SupplyWhen picking a power source for your project, a higher voltage is usually the better option. The higher voltage can do more and create better outcomes, but your system must be able to manage the additional voltage. When electricity is not restricted, the difference in these additional 12 volts of power might cause damage. Before determining that more is better, make sure that everything will function together well. 5.6 24V Power Supply Problems & ResourcesDamage occurs, but it is frequently repairable. People's largest problem with power supplies is that they aren't installed and put together correctly. You must comprehend what the 24V power source, ground, output, and other components entail. Make sure the process is set up appropriately, and you should have fewer issues with this resource in the long run. If you're having trouble with a 24V power supply, electricians and programmers are usually well-versed on how to get the most out of one. 5.7 Frequently Asked Questions About 24V DC Power Supply1.Can I use a 12V power supply on a 24V?Going the other way - 24V LED strips on a 12V power supplyIf you're trying to go the other way and connect a 12V power supply to operate 24V LED strips, unfortunately, you are out of luck. You'll need to purchase a transformer or voltage booster, or, more straightforwardly, a 24V power supply. 2.Can I use 24V AC for 24V DC?24 volt AC/DC converters with 19 to 28V AC input. These are also known as 24 volt rectifiers, and voltage regulators. They can be used whenever 24V AC power is available and 24V DC power is needed, up to 60 watts. 3.Can I use a 19V power supply on a 24V?As long as the adapter can supply as much or more than the device needs, you're good. Attaching an adapter to a device that needs more current than it can supply will likely damage the adapter. Ⅵ Differences Between DC and AC Power Supplies6.1 Characteristics of DC Power SupplyThe advantages and disadvantages of direct current, in which electricity always flows in the same direction, are as follows. The direction of the current in alternating current is constantly changing. As a result, when a capacitor or inductor is used in the circuit, the current flowing to the load is delayed or advanced in proportion to the voltage behavior. The voltage and direction of the current are always constant with direct current, therefore the behavior of the capacitors and coils is also consistent. As a result, there is no advance or delay in the circuit in DC. Because the direction of the current is shifted in alternating current (AC), not all of the electricity travels through the load, and some power is generated simply passing back and forth between the load and the power source. This is referred to as reactive power. Because the current runs in a consistent direction, all electricity goes through the load in direct current. A scallop is being pushed out in this photograph. As a result, no reactive power is generated, allowing power to be used more efficiently. Another benefit of direct current is that it may be stored in batteries, capacitors, and other devices. Direct current, on the other hand, has several drawbacks. One of them is that interrupting the current is difficult. Because the direct current is always subjected to a constant voltage, particularly when the voltage is high, problems such as arcs (sparks) may arise at the point of interruption, or there may be a risk of electric shock in the immediate vicinity. When the voltage changes from positive to negative or negative to positive in alternating current, the voltage drops to zero for a brief duration. You can interrupt the current more safely than with a direct current if you aim for a time when the voltage is low. In addition, while converting DC voltage, it must first be converted to AC and then back to DC. As a result, DC voltage conversion equipment is larger and more expensive than AC voltage conversion equipment. The severe corrosion of subterranean pipes and insulators necessary for electricity transmission is another downside of direct current. Because DC continually flows in the same direction, electrostatic induction and electrical corrosion cause power transmission equipment to corrode. Direct current is what comes out of batteries, capacitors, and other stored objects. As a result, battery-powered products are compatible with direct current. The power supply in an average home, on the other hand, is AC, while DC is used in electronic equipment like computers and home appliances like televisions. The AC from the outlet is converted to DC using capacitors and other devices to power such devices. However, in data centers where DC is primarily used, the installation of a DC power supply is encouraged to minimize the loss caused by the conversion of AC to DC. 6.2 Characteristics of AC power supplyDirect current is what comes out of batteries, capacitors, and other stored objects. As a result, battery-powered products are compatible with direct current. The power supply in an average home, on the other hand, is AC, while DC is used in electronic equipment like computers and home appliances like televisions. The AC from the outlet is converted to DC using capacitors and other devices to power such devices. However, in data centers where DC is primarily used, the installation of a DC power supply is encouraged to minimize the loss caused by the conversion of AC to DC. For example, if you need 3000W (watts) of power, you'll need 30A (amperes) of current if the voltage is 100V, but only 3A if the voltage is 1000V. In other words, if the voltage is increased by a factor of 10, the current is lowered to 1/10, and the power loss is reduced to 1/100, or the square of 1/10. As a result, for long-distance transmission, extremely high voltages are utilized. Of course, the current-voltage is unsuitable for usage in houses and workplaces. For major factories, the voltage is 100,000 volts, for buildings, it is 6600 volts, and for houses and offices, it is 200 volts or 100 volts. As a result, the voltage of electricity transmitted from a power plant must be reduced to suit the region or location. In comparison to direct current, alternating current can be easily changed by transformers, making it more appropriate for power distribution as infrastructure. Another benefit of AC is that it is simple to shut off while electricity is being delivered, as the voltage lowers to zero at regular intervals. It can also be used like a domestic power supply (outlet) without discriminating between positive and negative, making device connection and operation easier. Because the voltage value is constantly changing and there are periods when the voltage dips to zero, AC requires a higher voltage than the target voltage for the required amount of heat. AC voltage has a sinusoidal waveform with a maximum voltage of 2 times the running value. The effective value must be exceeded by the insulation performance and equipment standards. Another feature of AC is that coils and capacitors have a significant impact on it. Coils and capacitors provide voltages that induce current to flow in the opposite direction of the current flow, causing the current to advance or lag in the circuit. Alternating current electricity is created and sent to a power plant. Three AC waves are sent out at the same time at a power plant, with the waveform of the AC altered by 120 degrees. A three-phase alternating current is a name for this sort of power. There are two types of air conditioners: single-phase and three-phase. A three-phase AC is utilized for high-voltage power transmission in particular. It is converted to one phase, along with the voltage conversion, when it is supplied to a residential outlet. AC is used in standard power outlets and for motors that do not require precise control, such as vacuum cleaners and ventilation fans. Motors for air conditioners, washing machines, refrigerators, and other appliances, on the other hand, do not use AC power as is, but instead need inverters for fine control. 6.3 AC Power Supply Vs. DC Power Supply Alternating Current Direct CurrentAmount of energy that can be carriedIt's safe to transport over greater distances in the city and can deliver more power.DC voltage can only travel so far before it starts to lose energy.Cause of the direction of flow of electronsRotating magnet along the wire.Steady magnetism along the wire.FrequencyDepending on the country, the frequency of alternating current is 50Hz or 60Hz.The frequency of direct current is zero.DirectionWhile passing through a circuit, it reverses its direction.It flows in one direction in the circuit.CurrentIt is the current of magnitude varying with timeIt is the current of constant magnitude.Flow of ElectronsElectrons alternate between forward and backward motion.Electrons move steadily in one direction or 'forward'.Obtained fromA.C Generator and mains.Cell or Battery.Passive ParametersImpedance.Resistance onlyPower FactorLies between 0 & 1.it is always 1.TypesSinusoidal, Trapezoidal, Triangular, Square.Pure and pulsating. Ⅶ How to Choose the Best DC Power SupplyThe most common selection criteria are:Number of output channels (single or multi output)Output voltage, current, and powerSetting resolution and accuracyRipple and noiseFeatures and programmabilityAdvanced features like current measurement with nanoamp resolution, sequencing, analog inputs, digital I/O, and  programming features 

CatalogIntroductionⅠ What is a Hot Swap PCB?Ⅱ Custom Keyboard - Hotswap vs. Solderable PCB    2.1 Advantages of Hotswap PCB    2.2 Disadvantages of Hotswap PCB    2.3 Advantages of Solderable PCB    2.4 Disadvantages of Solderable PCBⅢ What Is a Hotswap Mechanical Keyboard?Ⅳ Why are so few hotswap keyboards available?Ⅴ How to Make Hot-Swappable Mechanical keyboard PCB?Ⅵ Relevant Information about "Hot Swap PCB"IntroductionWhen building a custom mechanical keyboard, one of the most contentious decisions is whether to use a hotswap PCB or a solderable PCB. Is one superior to the other? This article will go over the specifics of the hot swap PCB.Ⅰ What is a Hot Swap PCB?The need to solder on switches is one of the most intimidating obstacles for people looking to build a mechanical keyboard. Hot swap PCBs, on the other hand, come to the rescue! A printed circuit board, or PCB, is the brain of your keyboard.There are two ways to connect your mechanical switches to the PCB to register inputs.1.SOLDER PCBSoldering necessitates the use of a soldering tool and solder, a low-melting metal alloy. This method entails inserting the pins of a switch through holes in your PCB and then melting the solder to connect the two. This secures the switch and creates a connection between the PCB and the switch's metal pins. When you press the switch, the signal can now transfer, register as an input, and eventually, trigger an action on your computer.Before attempting to complete this process properly, some research is required. You risk burning the solder, destroying the socket on your PCB, or messing up the switch's pins. Soldering may appear intimidating, but observing video tutorials and practicing with other objects will teach you how to do it correctly and safely.2. HOT SWAP PCBThe second, and far more straightforward method, is to install your switches using a hot swap PCB. You push your switch's pins into pre-installed sockets rather than using a soldering tool and solder. Hot swapping is similar to installing PC components  or Legos; you simply plug and play. It is quick, requires no training, and allows you to easily swap out switches.Glorious Modular Mechanical Keyboards (GMMK) all use hot swap PCBs.  making them the ideal choice for those looking for a simple, intuitive, and customizable keyboard experience.When installing switches into a hot-swap PCB, a softer surface to push against is recommended. Lining up your switch with the socket requires precision, so a softer surface reduces the possibility of bent pins. Furthermore, when removing switches, you should be gentle on the board. Ripping out a switch could result in catastrophic harm to the hot-swap socket.Note: A solder PCB  can be converted to a hot-swap PCB, but this still necessitates the use of a soldering tool. Furthermore, it is not a simple procedure that we recommend for beginners. Ⅱ Custom Keyboard  - Hotswap vs. Solderable PCB  When building a custom mechanical keyboard, one of the most contentious decisions is whether to use a hot swap PCB or a solderable PCB. Is one superior to the other?To that end, we will discuss the benefits and drawbacks of the two PCB options. The short answer is that there is no "better" PCB – it all comes down to personal preference, which is what defines the custom keyboard hobby.2.1 Advantages of Hotswap PCB  The most significant advantage of using a hotswap PCB  is the ease of switch installation, making it ideal for beginners. Simply ensure that the two pins of a switch are straight, install it to the PCB, and you're ready to go! You are not required to solder each individual switch to the PCB.Another reason why a hotswap PCB  is ideal for newcomers to the pastime is that it allows them to experiment with different switches in real-time. When you're new to the hobby, it's essential to figure out what kind of switch you like and don't like, and a hotswap PCB  makes this stage of...discovery easier.Aside from that, a hotswap PCB  simplifies keyboard tuning and maintenance. Assume you've been using your keyboard for a couple of years and you need to re-lube your switches – yes, you do need to re-lube your switches after some time.With a hotswap PCB.  you can simply remove the switches from your keyboard without having to desolder them.Tuning your stabilizers with a hotswap PCB is also not as difficult, assuming you use screw-in stabilizers. The issue is that you usually have to completely disassemble your keyboard to get to the screw-in stabilizers. Every component attached to the PCB, including the switches and plate, must be removed.While you may have fine-tuned your stabilizers during assembly, they may begin to tick later on. To be sure, you can inject lube directly into the stabilizer housing to try to solve the problem, but this doesn't always work – in my experience, it usually doesn't.2.2 Disadvantages of Hotswap PCB  You're stuck with only one layout if you use a hotswap PCB right away. Of course, some keyboards, such as the Ikki68 Aurora, provide slightly more layout options, but they still fall short of the sheer flexibility of a solderable PCB in this regard. Furthermore, you cannot use a hotswap PCB for half-plate builds. Because the switches are not as "attached" to the PCB as soldered switches are, using a half plate with a hotswap  PCB is not recommended.A half plate, as the name implies, does not cover the alphas on a keyboard. If you use a hotswap PCB with such a plate, the switches in the alphas portion are basically "suspended" without any support from the plate – this can damage a hotswap PCB,  2.3 Advantages of Solderable PCBAs previously stated, a solderable PCB allows you to design your own layout with almost no restrictions. Do you prefer a longer 7u spacebar over a 6.25u spacebar? That's fine. Would you rather have a split backspace than a full backspace? Done.A half plate with a solderable PCB, on the other hand, will provide a softer typing experience. You are typing directly on the PCB because the alphas portion of a half plate is exposed. You'll get a softer, less harsh typing experience if the PCB has flex cuts – a hotswap PCB doesn't have this kind of flexibility.Aside from that, a solderable PCB is less expensive than a hotswap PCB. The price difference isn't particularly significant – about $10 more in most cases – but it's worth noting. However, that is not the entire picture; I'll discuss this further in the following section.2.4 Disadvantages of Solderable PCBEven though a solderable PCB is less expensive than a hotswap PCB. It requires more tools to assemble, such as a soldering iron and desoldering tools. Depending on whether you already have such items, these do increase the "cost of ownership" of a solderable PCB.Assembling a keyboard with a solderable PCB requires more work because each individual switch must be soldered to the PCB. You may even damage the PCB during the assembly process if you are inexperienced with a soldering iron.The inability to easily swap out switches is, in my opinion, the most significant disadvantage of a solderable PCB. This makes a variety of keyboard maintenance tasks more difficult, such as stabilizer tuning, switch relubrication, and troubleshooting any keyboard problems.That's it. You may prefer a hotswap or solderable PCB depending on your preferences. Personally, I always use a hotswap PCB for ease of installation, even if it means I can only do a single layout or a half plate build.In addition, I review keyboard switches  on a regular basis; having a hotswap PCB makes this process much easier.Ⅲ What Is a Hotswap Mechanical Keyboard  ?Hotswap = changing switches without solderingHotswap (also known as hot-swap or hot swap) is a popular feature that Kono Store and Input Club were early adopters of. It refers to keyboards that allow for switch replacement without the use of solder. Kaihua (Kailh), a leading switch manufacturer in China, developed the market-leading hotswap  socket design shown below.How can that get confusing?Many websites state that hotswap keyboards have "hotswap switches," which is rarely the case and can lead to minor confusion. Cherry MX-style hotswap keyboard switches can be used in keyboards with the same hotswap socket pinout/plate design, but they were not designed for hotswap use. These switches can even be soldered into a conventional keyboard. The true innovation is found on the PCB (Printed Circuit Board) or, in the case of actual hotswap switches such as our contactless SILO / Keystone line, in the underlying technology.Ⅳ Why are so few hotswap keyboards available?The most significant reason is a reduction in profit — both long and short term. Hotswap sockets are slightly more expensive per keyboard. Most mass-market keyboards are generated in batches of several thousand or more, so manufacturers don't like the extra cost eating into their profit. They also make repairs very simple; when switches wear out, people are much less likely to purchase a new keyboard rather than repairing it themselves.Implementing hotswap sockets also necessitates some engineering expertise. They take up extra space on the PCB, requiring precise component placement and routing. This limits international layout support at the PCB level, which is especially important if a keyboard includes LEDs. Separate PCB designs are usually required if you want a European enter key or a split space bar in a hotswap keyboard. By reducing LED functionality, keyboards such as the Minivan, which is no longer accessible, achieve partial all-in-one success.Ⅴ How to Make Hot-Swappable Mechanical keyboard PCB  ?Hot-Swappable Sockets for DIY Mechanical Keyboard  With a hot-swappable mechanical keyboard, you can replace switches and LEDs on the fly without soldering or even turning off the keyboard. In this short video tutorial, I demonstrate how to make any printed circuit board for a mechanical keyboard hot-swappable by including footprints for Cherry MX plate switches. Other manufacturers' switches, such as Gateron and Kaihl, are compatible with the Cherry MX switches, making this a universal solution.Required HardwareSuitable printed circuit board (for example for ANAVI Macro Pad 8 maker kit)Switches made of metal3mm LEDs are optional, depending on the type of PCB and switches.KeycapsTE Connectivity / AMP 8134-HC-8P2 Holtite sockets for mechanical switches and TE Connectivity / AMP 8134-HC-5P2 Holtite sockets for 3mm LEDsTweezers, cutters and soldering irons are required tools.Holtite sockets for hot-swap  Step 1Insert the holtite sockets  into the PCB with tweezers . Because the sockets are small, take care not to lose any of them. Switch on the soldering iron. Warm each socket and push it gently. So we're using a soldering iron, but not for soldering. We're just using its heat to mount the sockets.It appears to be simpler than it is. It took some time for me to do it for all of the switches and LEDs. Each key has two holes for the switch and two holes for the LED, so you'll need four sockets of the appropriate size for each key.Step 2The following step is optional and only applies to the ANAVI Macro Pad 8 . The maker kit includes a WS2812B addressable LED strip that should be soldered to the back of the keyboard's side. Please take note of the arrow indicating the direction of the LED strip and ensure you place it correctly as shown in the video.Step 3Cut the legs of the 3mm LEDs  to ensure a good fit in the hot-swappable holtite sockets we've already installed.Step 4Put the switches, LEDs, and keycaps together. After you've completed step 1, this is a simple process since you already get a hot-swappable printed circuit board  for the mechanical keyboard.ANAVI Macro Pad 8 customized with blue Cherry MX switches and green 3mm LEDs for backlightingThe Gateron red switches, red LEDs, and white translucent keycaps that come standard with the ANAVI Macro Pad 8 are standard. In this case, however, I'm experimenting with blue Cherry MX switches, green LEDs, and dark translucent keycaps in the hot-swappable version. I bought a variety of mechanical switches, including Gateron Red, Cherry MX Blue , and Cherry MX Brown. Please keep in mind that the 3mm LED slots on the Cherry MX brown switches in the video are not present.The same method of using holtite sockets can be used on any other mechanical keyboard PCB  with a footprint for Cherry MX switches.Ⅵ Relevant Information about "Hot Swap PCB"1. Are hot-swappable PCBS good?If you're new to mechanical keyboards and not looking to learn how to solder, we recommend a PCB with hot-swap sockets as they are the most beginner friendly.2. Are solder switches hard?Soldering isn't difficult, especially with good tools, but it's still a skill which must be learned and it just doesn't make sense to risk a prized keyboard while you're learning. There are many posts here from folks who have damaged a keyboard with their first soldering attempt and looking for advice on how to fix it.3. What does a soldered PCB mean?PCB soldering is another term for the process of soldering electrical circuit boards. ... As the soldering iron melts this metal, it is then used a bit like glue to stick to pieces together. As the solder metal cools, it will re-harden into one large shape that connects the two parts.4. Can you put 3 pin switches in a 5 pin PCB?There are holes for 5-pin (PCB mount) switches, but 3-pin switches work just fine here since the plate is fastened to the PCB - alignment and stability won't be an issue. This PCB uses good quality Kailh hotswap sockets.5. Does PCB affect sound keyboard?Re: How does the PCB affect the sound of the keyboard? PCB will have minimal effect, despite being connected, it's a soft material and the plate tends to take the actual impact regardless of mount. The plate will change the sound of the ping, but more importantly it can and usually does amplify it.6. What temperature should I solder PCB?600°- 650°F (316°- 343°C) is a good place to start for lead-based solder and 650°- 700°F (343°- 371°C) for lead-free solder. You want the tip hot enough to melt the solder efficiency, but excess heat can damage components as the heat travels along the leads, and it will reduce the lifespan of the soldering tip.7. What are types of PCB?Common Types of Printed Circuit BoardsSingle Layer PCB. Single layer printed circuit boards are among some of the simplest to design and manufacture. ...Double Layer PCB. ...Multi-Layer PCB. ...High Density Interconnect (HDI) PCB. ...High Frequency PCB.8. Is Ducky hot-swappable?All standard Ducky One 3 mechanical keyboards are hot-swappable and feature Kailh's hot-swap sockets. Colored in a vibrant yellow, Kailh sockets are chosen for their impressive reliability.9. Do hot swap keyboards need soldering?All you need to do is just ensure that the two pins of a switch are straight, install it to the PCB, and…you're good to go! You don't have to go through the trouble of soldering each individual switch to the PCB. ... Other than that, a hotswap PCB makes keyboard tuning and maintenance much, much easier as well.