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IntroductionAs the most popular open-source hardware in the world, Arduino is not only an excellent hardware development platform, but also a trend in hardware development. Its simple development method makes developers pay more attention to creativity and realization, complete their own projects and get experiments faster, which greatly saves the cost of learning and shortens the development cycle. There are too many want to say, in short, arduino provides a lot of convenience for many electronics enthusiasts and creators, and also provides a platform for sharing their results. So what exactly is it? How does it work?CatalogIntroductionⅠ What is Arduino?Ⅱ Who Make the Arduino?Ⅲ Why Use Arduino?Ⅳ What Does Arduino Have?Ⅴ Arduino Programming LanguageⅥ Arduino Basic ArchitectureⅦ Copyright and PaymentⅧ Simple Arduino Projects8.1 Video Demonstration8.2 Examples and Programming CodesⅨ FAQⅠ What is Arduino?Arduino is a tool that can be used to sense and control the physical world more than your desktop computer. It consists of an open source-computer platform based on a simple single-chip microcomputer, and a development environment for writing programs for the Arduino board.Arduino can be used to develop interactive products. For example, it can read a large number of switches and sensor signals, and can control a variety of lights, motors, and other physical devices. The Arduino project can be a standalone project, or it can communicate with programs running on your computer (for example: Flash, Processing, MaxMSP) at runtime. You can choose to manually assemble the Arduino board yourself or buy a productthe, because open-source IDE can be downloaded for free.The Arduino programming language seems to be correspondingly connected to a physical computing platform, which is based on a programming environment that handles multimedia.Learn Arduino in 15 MinutesⅡ Who Make the Arduino?Massimo Banzi was a teacher at a high-tech design school in Ivrea, Italy. His students often complain about not being able to find cheap and easy-to-use microcontrollers. In the winter of 2005, Massimo Banzi discussed this problem with David Cuartielles. He is a Spanish chip engineer who was a visiting scholar in this school at the time. The two decided to design their own circuit boards and introduced David Mellis (Banzi student) to design a programming language for the circuit boards. Two days later, David Mellis wrote the code. After another three days, the circuit board was completed. Massimo Banzi likes to go to a bar called di Re Arduino, which was named after the Italian king Arduin 1,000 years ago. To commemorate this place, he named this circuit board Arduino.Figure 1. The Making Arduino Core Team Ⅲ Why Use Arduino?There are many single-chip microcomputers and their platforms that are suitable for the design of interactive systems. For example: Parallax Basic Stamp, Netmedia's BX-24, Phidgets, MIT's Handyboard and others provide similar functions. With all these tools, you don't need to care about the cumbersome details of MCU programming. Arduino provides you a set of easy-to-use toolkits. Arduino also simplifies the process of working with a single-chip microcomputer, but compared with other systems, it has many advantages in many places. In fact, it is especially suitable for teachers, students and some amateurs:0️⃣Cheap1️⃣Cross-platform2️⃣Simple programming environment3️⃣The software is open-source and expandable.4️⃣Hardware is open-source and expandable. Ⅳ What Does Arduino Have?At the beginning of Arduino development, its application environment was clarified, and an open-source platform was designed to facilitate its secondary development. The main features of Arduino are as follows:1) Open-source circuit diagram design. The program development interface is free to download, or you can modify it according to your needs. Arduino carries low-priced microcontrollers (ATmega8 or ATmega128). It can be powered by a USB interface, no external power supply, and an external 9VDC input can also be used.2) Support ISP online programming, making the Bootloader firmware into the chip. The Arduino controller contains the Bootloader program, which is the first piece of code that runs after the system is powered on. It is like the program in the BIOS of the PC. It performs self-check after startup, configures the port, and so on. Of course, the microcontroller relies on programming the fuse. Set the startup from the boot area after power-on, and use this program to directly store the program sent from the serial port in the flash area. Therefore, when using the Arduino compilation environment to download the program, first reset the microcontroller and start the Boodoader program to guide the program sent from the serial port to be successfully written into the flash area. The flash can be programmed repeatedly, so it is very convenient to update the software. After having Bootloader, you can update the firmware through the serial port or USB to RS232 line.3) According to the official PCB and SCH circuit diagrams, the Arduino module can be simplified to complete independent micro-processing control.4) It can be easily connected with sensors and various electronic components, such as infrared, ultrasonic, thermistor, photoresistor, servo motor, etc.5) Support a variety of interactive programs, such as Flash, Max/MSP, VVVV, PurEDAta, C, Processin, etc.In terms of application, the use of Arduino can break through the interactive content of devices that can only use mouse, keyboard, CCD and other input devices in the past. For example, it can achieve single-player or multi-player game interaction more simply. The functional characteristics of Arduino make it more and more widely used. Ⅴ Arduino Programming LanguageUsually, the Arduino language we say refers to a collection of various application programming interfaces (APIs) provided by the Arduino core library files. Arduino uses C/C++ to write programs. Although C++ is compatible with C language, these are two languages. C language is a process-oriented programming language, and C++ is an object-oriented programming language. The early Arduino core library was written in C language, and later object-oriented ideas were introduced. At present, the latest Arduino core library is written in a mixture of C and C++.The Arduino language is a program framework that starts with setup() and loop() as the main body. setup() is used to initialize variables, pin modes, call library functions, etc. This function only runs once, and its function is similar to "main()" in C language. For the loop() function, the statements in the function are executed in a loop.Arduno language modularizes some parameter settings related to AVR microcontroller, including EEPROM, Ethernet, LED matrix, steering gear, stepping and TWI/I2C control library. It does not require the user to directly deal with the underlying system, which can improve the efficiency of application development. Ⅵ Arduino Basic ArchitectureThe Arduino system has also developed different versions based on different application environments. The "Arduino Duemilanove" version is used as an example to introduce the Arduino system. This version was developed in 2009 and is based on the atmega328 microcontroller board. During use, connect the computer with a USB cable or use a power adapter to power it.1) One 9V DC input provides external power output for the Arduino board, so that the Arduino control board has the ability to drive high-power external devices such as steering gear.2) One USB port used to connect the computer. The Arduino IDE uploads the control program written by the user to the control board, and at the same time, it can also supply power to the circuit board and drive low-power external devices through this port.3) 14 digital input/output terminals, among which ports 0 (RX) and 1 (TX) are respectively connected to the serial pins of the main control chip to receive and send TTL serial data. Among them, ports 2 and 3 can receive external signals to realize external interrupt function. Ports 3, 5, 6, 9, 10, 11 are used as PWM ports, which can be used for motor PWM speed regulation or music playback. Port 10 (SS), 11 (MOSI), 12 (MISO) and 13 (SCK) can provide SPI communication mode with the support of SPI module library. Port 13 is connected with an LED indicator, which can open and close with the change of the level on pin 13.4) 6 analog input/output ports, of which port 4 (SDA) and port 5 (SCL) can realize I2C communication.5) One 5V DC output and one 3.3V DC output, which can provide 3.3V and 5V DC power supplies for other circuits.6) One reset interface.The Arduino system is developed based on a single-chip microcomputer, and a large number of common and standard electronic components are used on it. The entire design, including hardware and software, is released in an open source manner. Therefore, the cost of procurement is relatively low. In various electronic production competitions, Arduino is used as a development platform for creative design of electronic artwork.Figure  2. Arduino Board Terminals🔺Arduino Hardware✔️There are many motherboard, such as:Arduino UnoArduino NanoArduino LilyPadArduino Mega 2560Arduino EthernetArduino DueArduino LeonardoArduinoYún✔️There are many expansion boards for Arduino, such as:Arduino GSM ShieldArduino Ethernet ShieldArduino WiFi ShieldArduino Wireless SD ShieldArduino USB Host ShieldArduino Motor ShieldArduino Wireless Proto ShieldArduino Proto Shield Ⅶ Copyright and PaymentIn order to maintain the open-source concept of the design, Arduino decided to adopt the Creative Commons license, which is a license similar to GPL that appears to protect open copyright activities. Because copyright law can regulate open-source software, but it is difficult to use it on hardware. Having this license, anyone is allowed to produce copies of circuit boards, redesign, and even sell copies of the original design. You don't need to pay royalties, or even get permission from the Arduino team. However, if you republish the reference design, you must sign the original Arduino team. In addition, if you adjust or modify the circuit board, your latest design must use the same or similar license to ensure that the new version of the Arduino circuit board will be free and open. In other words, only the name Arduino is reserved, and it is a trademark now. If someone wants to sell a circuit board under this name, they must pay a small trademark fee to the Arduino core development members. Ⅷ Simple Arduino Projects8.1 Video DemonstrationBasic Projects with Arduino8.2 Examples and Programming Codes🔺Water Lamp ControlInsert 6 LED lights on the breadboard, among which the long pins are assigned to the 6, 7, 8, 9, 10, 11 ports of arduino respectively, the short pins are all connected to the blue wire of the breadboard, and then one port of the blue wire is connected to the GND port of the arduino. Figure  3. Water Lamps ConnectionCode:void setup(){ pinMode(6,output);pinMode(7,output);pinMode(8,output);pinMode(9,output);pinMode(10,output);pinMode(11,output);}void loop(){digitalWrite(6, LOW);digitalWrite(7,HIGHT);delay(200);digitalWrite(7, LOW)；digitalWrite(8,HIGHT);delay(200);digitalWrite(8,LOW);digitalWrite(9,HIGHT);}🔺Using the Buzzer to Realize the AccordionThe buzzer is set according to different frequencies, so set the corresponding buzzer frequency based on the level of the switch interface.void setup(){pinMode(8,INPUT);  //switch setdigitalWrite(8, HIGH);pinMode(9,INPUT);digitalWrite(9, HIGH); piMode(10,INPUT);digitalWrite(10, HIGH); pinMode(11,OUTPUT) //light setpinMode(12, OUTPUT)pinMode(13,OUTPUT)}void loop(){if(digitalRead(8)==LOW){tone(7,2093);  //the buzzer frequency is set to 2093digitalWrite(11, HIGH);}else{notone(7);digitalWrite(11,LOW);}Repeat 2 switch values down;;; 🔺Breathing LightThe so-called breathing is relatively stable, so it cannot flicker and go off like a flashing LED. So analog output is used, and the current changes continuously.Figure  4. Breathing Light ConnectionCode:void setup(){pinMode(11,OUTPUT);  }void loop(){for(int i=0;i<30;i++){analogWrite(11,i);   //analog signal input, the range of i is [0,255];delay(10);}for(int j=29;j>0;j--){analogWrite(11,j);delay(10);}} Among them, the corresponding relationship between the analog signal voltage and the digital signal voltage:How is the analog signal realized to control the voltage within a range in a cycle?Figure  6. PWMAs shown in the figure, “on” belongs to 5V, and “off” belongs to 0V. In a time period, that is, when a pulse is sent, the duration of “on” in the previous figure is 25%, and the “off” is 75%. The voltage value calculated like this: v0=5*25%+0*75%=1.25(v). It can be simply understood like this. 🔺Breathing Water Lampvoid  setup(){pinMode(3, OUTPUT);pinMode(5, OUTPUT);pinMode(6, OUTPUT);pinMode(9, OUTPUT);pinMode(10, OUTPUT);pinMode(11, OUTPUT);}int  ports[6]=[3,5,6,9,10,11];int i=0，level=0; set loop(){ analogWrite(ports[i], level);delay(10);++level %=7;++i %=6;  i is incremented first, and then modulo 6, that is, i is always in the range of 0~5；}🔺Vibrating LEDPhotoresistor, resistor, LED are required;Connect one end of the photoresistor to 5V, the other end to the resistor, and the resistor to GND. Pull out a wire between the two and connect to analogIn;Figure  7. Vibrating LED ConnectionCode:void setup(){Setrial.begin(9600);}void loop(){Setril.printIn(analogWrite(0));  //the middle wire is connected to port 0, which is the serial output port；delay(200);} 🔺Electric BellWhen energized, electromagnetic induction produces magnetic force, the switch (oscillator) is attracted and pulled down; When the power is cut off, the coil loses its magnetism, the switch is restored, and then energized. That is, repeat the cycle. This is also the principle of crystal oscillator.Figure  8. Electric Bell DiagramCode:void setup(){pinMode(9,OUTPUT);Setrail.begin(9600);}void loop(){Setrail.printIn(analogRead(0));analogWrite(9, map(analogRead(0), 400,700,0,255);   //map(a1,b1,a2,b2), that is, the original range of values [a1,b1] is mapped to [a2,b2];delay(200);} Ⅸ FAQ1. What is an Arduino used for?Arduino is an open-source electronics platform based on easy-to-use hardware and software. Arduino boards are able to read inputs - light on a sensor, a finger on a button, or a Twitter message - and turn it into an output - activating a motor, turning on an LED, publishing something online.2. Is Arduino illegal?The hardware designs of Arduino are open source; it is allowed to copy and further develop the designs. Note that in case a copy uses the Arduino name and/or logo on it, this board is no longer a copy but a counterfeit which is illegal to manufacture and sell.3. Can Arduino run C++?First, the Arduino compiler/IDE accepts C and C++ as-is. In fact many of the libraries are written in C++. Much of the underlying system is not object oriented, but it could be. Thus, "The arduino language" is C++ or C.4. Is Arduino easy to learn?Arduino is cost-effective and easily accessible. Arduino is easier to learn as a programming language as it is a simplified version of the C++ programming language. Arduino is cross-platform which makes it easy to run on any sort of device compared to other microcontrollers which can only run on windows.5. What is the difference between Arduino and Raspberry Pi?The main difference between them is: Arduino is microcontroller board, while Raspberry Pi is a microprocessor based mini computer (SBC). The Microcontroller on the Arduino board contains the CPU, RAM and ROM. All the additional hardware on Arduino Board is for power supply, programming and IO Connectivity.6. Why is Arduino so popular?So the Arduino hardware is easy, the Arduino IDE is simple, and the code itself is much easier to comprehend (than trying to program an off-the-shelf microcontroller). ... Another reason Arduino is so popular is because there are many people using it which means there's a lot of examples out there to work with.7. Can I sell my Arduino project?Yes, with the following conditions: Physically embedding an Arduino board inside a commercial product does not require you to disclose or open-source any information about its design. ... You may manufacture and sell the resulting product.8. Do you have to use the Arduino IDE?Can I program an Arduino board without the Arduino IDE? Yes, you can use Create web editor to program your board without the need of download the classic IDE.9. Can I use Python in Arduino?Arduino uses its own programming language, which is similar to C++. However, it's possible to use Arduino with Python or another high-level programming language. In fact, platforms like Arduino work well with Python, especially for applications that require integration with sensors and other physical devices.10. What language does Arduino code in?Arduino is programmed with a c/c++ 'dialect'. Most c/c++ will work but much of the standard libraries will not work.11. Which language is best for Arduino?Any language that has a compiler that generates Arduino compatible machine code will be perfect. As of this moment , a subset of C / C++ is the only language that is supported by the Arduino IDE.12. How do I program an Arduino?1) Use your Arduino Uno on the Arduino Web IDE.2) Use your Arduino Uno on the Arduino Desktop IDE. Install the board drivers. Open your first sketch. Select your board type and port. Upload the program. Learn more on the Desktop IDE.3) Tutorials.13. Can Arduino connect to WiFi?Connect your Arduino to the internet by adding ESP8266 WiFi Module ... Adding this module to your Arduino UNO will open you to more and exciting projects.14. Can an Arduino run Linux?Arduino have a couple of boards that support running a variant of Linux called Linino: The Arduino Yún is a microcontroller board based on the ATmega32u4 and the Atheros AR9331. The Atheros processor supports a Linux distribution based on OpenWrt named Linino OS.15. What should I learn before Arduino?Before learning Arduino you need to have knowledge of basic programming. You can choose any language like C, C++ or Java. And apart from that you need to have basic idea about electronic devices like which part it is?, How it works? etc.16. Where do I program Arduino?Arduino programs are written in the Arduino Integrated Development Environment (IDE). Arduino IDE is a special software running on your system that allows you to write sketches (synonym for program in Arduino language) for different Arduino boards.17. How many types of Arduino are there?Top 6 Different Types of ArduinoArduino UNO. The development of Arduino UNO board is considered as new compared to other Arduino boards.LilyPad ArduinoArduino MegaArduino LeonardoArduino Red BoardArduino Shields18. Is Arduino good for beginners?Arduino is easily accessible - even for those who don't know much about electronics. Arduino boards are simple a type of microcontroller. They are able to read inputs from the sensors and turn those inputs into output. Arduino is the best for beginners looking to get started with electronics for the first time.19. Which is more powerful Raspberry Pi or Arduino?Given those differences you might think a Raspberry Pi is so much more powerful and capable than Arduino, so you should use that. ... Raspberry Pi has 8. Individual I/O pins in Arduino can drive 40mA while Raspberry Pi GPIO pins can each drive a maximum of 16mA.

Ⅰ IntroductionA computer  whether it is a laptop  or a desktop has a Motherboard where a small amount of memory known as  CMOS  (complementary metal-oxide-semiconductor) stores the BIOS  settings. Hardware settings, system time, and date are the parts of BIOS  settings. BIOS  protects the data each time the computer  turns off. If  CMOS loses its power the system clock resets.CatalogⅠ IntroductionⅡ CMOS Battery Related VideoⅢ Computer BIOS Ⅳ What is a CMOS Battery ?Ⅴ What is the Lifeline of CMOS Battery?Ⅵ How do I Know My CMOS Battery Failed? Ⅶ How to Replace A CMOS Battery?7.1 Step 1: Remove the Previous CMOS Battery7.2 Step 2：What To Do After Taking Out The Battery？Ⅷ FAQ Ⅱ CMOS Battery Related VideoHow to remove cmos battery in your pc? Cmos reset / hard reset on biosCMOS Battery Video Description:In this video I will teach you how to remove your cmos battery  in your pc whether be in  ATX  or  mATX  or mini ITX motherboard  . Removing the cmos battery  for 5 minutes will give a hard reset on your motherboard  and this will clear unnecessary issues like wrong overclock, no video signal and seeing the "reboot and select proper boot drive" in your display Ⅲ Computer BIOS To comprehend the significance of a CMOS battery  , you must first comprehend what your computer  's BIOS  is.BIOS is pre-programmed into the hardware of every computer,  It is not the same as an operating system. Operating systems  can be installed, uninstalled, and updated long after the computer  has been purchased. BIOS  is something that is built into the computer  during the manufacturing process.BIOS is an abbreviation for "Basic Input/Output System." What exactly does it accomplish? Essentially, it manages your computer  's essential functions.All computer  s operate based on inputs and outputs. Assume you're launching a software application:An input is when your CPU  sends an instruction to your hard disk to retrieve the software program from storage.Your hard disk retrieves the data from the software program and sends it back to your CPU  ; this is output.The program is executed by your CPU,  It sends instructions to your graphics processor, instructing it on what image to create; an input.Your graphics processor then sends instructions to your monitor on how to arrange the pixels on the screen to create the image; this is output.Everything your computer  does can be reduced to an input or an output. The BIOS  is in charge  of managing your computer's exchange of inputs and outputs, mostly when you boot it up. BIOS  instructs your computer on how to boot up the operating system and also controls peripherals (such as the mouse and keyboard). To turn on your laptop  , you press the power button, correct? So, how is your laptop  supposed to process the power button when it is off? That is what the BIOS operated. While your computer is still waking up, it performs basic functions for it. The basic input is to press the power button. The basic output is that your operating system boots up. Next We will look at CMOS battery,  Ⅳ What is a CMOS Battery ?On your motherboard.  the motherboard  battery, also known as the CMOS (Complementary Metal-Oxide Semiconductor), functions as an RTC (Real-Time-Clock). Inside your computer.  the CMOS acts as a battery-powered semiconductor chip that stores important data. This information includes the system time, date, and system hardware settings, which are required for your computer to boot and load properly. All of this data is kept safe by a near-quarter-sized lithium battery located directly on the computer's motherboard, Figure1:CMOS battery Ⅴ What is the Lifeline of CMOS Battery?CMOS is also referred to as CMOS RAM, Non-Volatile RAM (NVRAM), or a real-time clock (RTC). The lifespan of a CMOS battery  is nearly ten years. It will differ depending on the computer's usage and environment. CMOS is used in devices such as static RAM (SRAM), microcontrollers, digital logic circuits, and microprocessors.When the computer is unable to display the correct date and time, the CMOS battery  has failed. The original button does not appear on all motherboard  s. Some of the most basic types of customization features are expansion port speed configuration, boot device order, memory handling, and power control.As we all know from personal experience, batteries do not last forever. Batteries will cease to function after a certain time. This could happen anywhere between two and ten years after the device is manufactured. If your computer is turned on, its battery will last longer than if it is turned off. Unlike other types of batteries, these are not rechargeable, and doing so may result in an explosion. Ⅵ How do I Know My CMOS Battery Failed?The following are the symptoms of CMOS battery  failure:The laptop  is having trouble booting up.The motherboard  emits a constant beeping noise.The date and time have been reset.Peripherals are not responsive or respond incorrectlyHardware drivers have vanishedYou are unable to connect to the internet.When your CMOS battery  dies, your BIOS firmware will shut down and reset to factory setting. Problems with booting up and constant beepingAs previously stated, BIOS is primarily responsible for booting up your  computer ,  Your laptop  may have a difficult time booting up without the battery, or it may not boot up at all. You may also hear a constant beeping noise from the motherboard.  which is another sign of a battery failure.Date and time from a long, long time agoIf your laptop  boots, you may notice that the date and time have been reset. They've most likely reset to a date in the distant past. Even when your computer is turned off, BIOS keeps a real-time clock that keeps track of the date and time. That procedure is maintained by CMOS (which is sometimes referred to as a real-time clock in and of itself). If the date and time have mysteriously reset, it's a good indication that the CMOS battery  has died.Keyboard performance is erratic.It's possible that your peripherals aren't responding; for example, you can't move your cursor or click on any icons, and the laptop  isn't reading any of your keyboard inputs.Alternatively, your peripherals may be thrown out of whack; your cursor may be inaccurate, and your key inputs may result in strange responses from the operating system.Alternatively, your customized keyboard configuration has been reset to the default. Because BIOS is in charge  of managing peripherals at startup, these are all indications of CMOS failure.Drivers vanishIf you've installed any drivers on your computer.  such as those for your home printer, a CMOS failure may cause those drivers to vanish (you'll need to download and reinstall them).There is no internet connection.You may also be unable to connect to the internet if your battery dies. BIOS is in charge  of keeping hardware and network drivers up to date.One thing you should be relieved about is that CMOS failure usually does not result in the loss of any personal files. Nothing in storage has been harmed. Once you've replaced the battery, you'll still have access to all of your photos, videos, and documents. Failure of ttery  Ⅶ How to Replace A CMOS Battery?Ground yourself before you touch your patient. That means making sure that any static electricity (which can be generated in small charge  s between your body and clothing but is weak enough not to hurt you) does not pass through the delicate computer parts, which may seem insignificant but can seriously damage some of the more delicate components inside your case.Important points include placing your computer case on a non-conductive (non-metallic) table or surface before opening it for treatment and standing on bare feet in contact with the floor. 7.1 Step 1: Remove the Previous CMOS BatteryTo do so, open your computer's case and locate the CMOS battery on the  motherboard ,  If you're treating a laptop.  you'll need to open the laptop  's back panel. Because it resembles a large silver coin sitting on your motherboard  , the CMOS battery is easy to locate. Figure2:motherboard The battery in most systems and laptops is held in place by a small clip next to it. Simply slide the battery out from under the clip like a big round SIM card, and you'll have the troublesome little silver coin in your hand.Also, under no circumstances should the clip be bent.As a result, it will be unable to hold the new battery in place. You're treating your computer.  and as the saying goes, "first not harm."Figure3:new battery And there is one more thing;In some laptops, the CMOS battery may be covered with non-conductive protection and attached to two wires that are connected to the laptop's motherboard  via a connector similar to this:Figure4: laptop's motherboardAnd, you know, it's also possible that you can't find the CMOS battery on your laptop's back panel;Because some manufacturers do not allow battery replacements, and if you are still insistent on removing the battery;In any case, you can look online for a 'how to disassemble your laptop' tutorial video.Like on the YouTube;And this will help you understand how to disassemble your laptop because the CMOS battery may be attached to the other side of your laptop's motherboard, Here's a picture of the laptop without a CMOS battery in the back panel:Figure5: back panel So, whatever battery type your computer is using, simply disconnect or remove it.Even if the CMOS Battery is soldered to the motherboard  in the following manner:Figure6:Battery is soldered 7.2 Step 2：What To Do After Taking Out The Battery？You have to now purchase the same CMOS battery for your laptop or computer that you recently removed from your laptop or computer, So, you'll need to go to a computer store or order the battery online. Whatever you do, make certain that you purchase the same type of battery. Ⅷ FAQ1. How do I get the CMOS out of the motherboard without damaging it?Use a flat head screwdriver, push the metal tab back away from the battery.  It should not take much force, and the battery will just pop out.2. Is the CMOS battery the same battery found in Automotive Key Fobs?Excellent question, YES!  The CR2032 can be found in many devices from calculators, wrist watches, medical devices, toys, and many more.3. Can a motherboard run without a battery?Technically, YES.  Removing the CMOS battery will allow your computer to run however, you will lose the date and time settings, the computer will boot with default BIOS settings or you will have to choose the drive that the OS is installed every time you start your computer.4. Will removing the motherboard battery reset BIOS?This is an excellent question I get asked alot.  The short answer is YES.  If you remove the battery, wait approximately 5 minutes and then reconnect the battery.5. Can a CMOS battery cause a black screen?A faulty battery removes all of your boot settings.  It is very possible to see nothing but a black screen when booting up a computer with a dead CMOS.  For example if you have a secondary video adapter that your monitor is plugged into and your BIOS has reset to default settings, your onboard video would be the new display and not your primary video adapter.

IntroductionAs everyone knows, Error correction code memory (ECC memory) is a type of computer data storage technique. It identifies and fixes the most common errors which could otherwise lead to data corruption or system crashes. In other words, it is one of the most important techs for this loss and system errors prevention. There will be people who have such a question: now the memory technology is improved greatly, it’s possible to use ECC server RAM inside of your regular desktop computer at home, but is it something you SHOULD do? This note will help you find clues step by step.ECC Memory ExplainedCatalogIntroductionⅠ What Causes Errors in RAM?Ⅱ Is ECC RAM Better?Ⅲ ECC Server RAM or Regular Home Desktop?Ⅰ What Causes Errors in RAM?The ram error is caused by electromagnetic interference inside the computer. This interference will cause the units of DRAM (Dynamic Random Access Memory) to spontaneously change to the opposite state. Unit errors may be hidden, that is, they will not have a serious impact on the data. However, the memory units are interrelated, so unit changes may affect the entire operating system, resulting in system errors, especially when the strict operation is required. To be specific, memory errors will cause security vulnerabilities, crashes, transcription errors, lost transactions and corrupted or lost data, and one of the most common types of memory error is a single-bit error.Ⅱ Is ECC RAM Better?In the face of these problems, if memory can fix the error itself, what will it look like? That is ECC RAM.Memory Chips DifferenceECC RAM is server memory. This type of memory module has an ECC error check storage chip (the number of storage chips is an odd number). The application of ECC can ensure that the server is safer and more stable during operation. However, the number of chips stored in ordinary memory sticks is even. In reality, ECC RAM has 9 memory chips instead of 8. Error Checking and CorrectingThe ECC memory is equipped with ECC error-checking technology. After error checking and correction, the stability and reliability of the server system can be effectively guaranteed. For ordinary ram, when the word detects an error, the error location cannot be determined, and the error cannot be corrected. Therefore, for a single task that takes a long time and cannot be suspended or error, ECC memory is an inevitable choice. However, ordinary PCs will not use because of high-cost price. Application DifferenceBecause ECC memory can effectively store and maintain data integrity and is equipped with check and correction technology, ECC memory further reduces data corruption. Therefore, it is mostly used in servers and graphics workstations such in financial and scientific industries. Non-ECC memory sticks are more suitable for the general public's use. Capacitor DifferenceAs server memory applications require higher capacity, ECC memory modules usually start at 4GB, while ordinary memory modules usually start at 2GB. The standard configuration on home computers is 4~8GB of memory. Price DifferenceDue to the higher-tech of ECC memory sticks, their capacity is also larger than ordinary memory. Therefore, ECC memory sticks are more expensive than ordinary memory.Ⅲ ECC Server RAM or Regular Home Desktop?ECC memory is usually used in servers or graphics workstations. Because of the check and correction function, when there are some read and write errors in the memory, the ECC RAM can correct these errors and reduce the probability of downtime/blue screen. Guaranteed data storage and accuracy of reading and writing.Server memory and ordinary PC memory are very similar, there is no obvious difference in appearance and structure, but its price is higher than ordinary memory. There are three main types of server memory: SDRAM, DDR, and DDR2. At present, server memory is mostly used by DDR and DDR2. As time goes by, the server uses some new technologies now, such as ECC, chip kill, register, hot-swap technology, FB-DIMM (full buffer memory module), etc. More server memory currently adopts ECC and REG ECC technologies. The chips on REG ECC memory are generally 2-3 more than ordinary motherboards, mainly PLL (phase-locked loop) and Register IC. ECC and ECC REG memory have been developed for a period, and the frequency mainly has 133, 266, 333, 400, 533, and 667 stages. What is RECC? The specific uses of RECC memory are as follows: phase-locked loop chip, the bottom of the memory stick are smaller than Register ICs. Generally, there is only one, which can adjust the clock signal and ensure signal synchronization between the memory modules. The smaller IC chip (2-3 pieces) at the bottom plays a role in improving the driving capability. Server products need to support large-capacity memory. The motherboard alone cannot drive such a large-capacity memory. Instead, the memory module with Register is used to improve the driving ability, so that the server can support up to 32GB of memory. Because of the PLL and Register chips, the server memory capacitor can be made very large, it can better meet the endless requirements of the ever-increasing software for memory. Therefore, it is recommended that the server whose requirement is over 16G use RECC RAM.RECC has one more register. We can understand the function of the memory as a book directory. When the memory receives a read and write command, it will retrieve this directory first, and then perform read and write operations, which will greatly improve the efficiency of the server memory. So some people mistakenly think that RECC RAM runs slower than ECC RAM. The Register memory that can be used at present also has an ECC function, and some motherboards require the memory to support Register. In fact, all registered memory is ECC memory. The use of ECC memory requires the support of other computer components, such as the motherboard and cpu, and may also need to be set in the BIOS before it can be used on most server CPUs and motherboards (some non-server CPUs and motherboards also support). In addition, when purchasing ecc memory, you need to pay attention to whether it is ecc udimm or ecc rdimm or ecc lrdimm or ecc 3ds rdimm or something else. Because your computer configuration may not support some types.What’s more, all of the modern, contemporary storage drives use ECC at some level internally. HDD, SSDs. The data densities of the HDD push the edge where need to keep up with track integrity. NAND in SSDs tend to loose data bits in usage over time. The SSD controller in the T2 isn't remarkable on the ECC dimension. All the ones that store the data encrypted 'at rest' basically have to if going to be competently implemented. In addition, ECC generally works on all Ryzen Chips minus the APUs (with the exception of the pro apus), they tend to not be on the QVL since it costs time and money to do that. Frequently Asked Questions about ECC Server Memory1. What is ECC memory?Error correction codeError correction code (ECC) memory is a type of RAM memory found in workstations and servers. It's valued by professionals and businesses with critical data for its ability to automatically detect and correct memory errors, thus fighting data corruption. 2. Which is better ECC or non-ECC memory?Non-ECC (also called non-parity) modules do not have this error-detecting feature. ... Using ECC decreases your computer's performance by about 2 percent. Current technology DRAM is very stable, and memory errors are rare, so unless you have a need for ECC, you are better served with non-parity (non-ECC) memory. 3. How does ECC memory work?ECC memory uses the extra bits to store an encrypted code when writing data to memory, and the ECC code is stored at the same time. ... As data is processed, ECC memory is constantly scanning code with a special algorithm to detect and correct single-bit memory errors. 4. What is the benefit of ECC memory?ECC memory protects your system from potential crashes and inadvertent changes in data by automatically correcting data errors. This is achieved with the addition of a ninth computer chip on the RAM board, which acts as an error check and correction for the other eight chips. 5. Who needs ECC RAM?Error-correcting code memory (ECC memory) is a type of computer data storage that can detect and correct the most common kinds of internal data corruption. ECC memory is used in most computers where data corruption cannot be tolerated under any circumstances, such as for scientific or financial computing.