The Kynix Components

VCU118 Evaluation is Programmable Logic IC Development Tools Xilinx Virtex UltraScale+ FPGA VCU118 -G Evaluation Kit  CatalogProduct OverviewKey Features & BenefitsPrice and StockVCU118 SpecificationsVCU118 Board FeaturesConfigurationCommunication & NetworkingExpansion ConnectorsControl & I/OClockingDisplayPowerKnown Issues for VCU118VCU118 DatasheetFAQProduct OverviewThe VCU118 evaluation board for the Xilinx® Virtex® UltraScale+™ FPGA provides a hardware environment for developing and evaluating designs targeting the UltraScale+XCVU9P-L2FLGA2104 device. The VCU118 evaluation board  provides features common to many evaluation systems, including:DDR4 and RLD3 component memoryDual small form-factor pluggable (QSFP+) connectorSixteen-lane PCI Express  ® interfaceEthernet PHYGeneral-purpose I/OTwo UART interfacesFireFly™ Optical x4 28 G connector Other features can be supported using modules compatible with the VITA-57.1 FPGA mezzanine card (FMC) and VITA-57.4 FPGA mezzanine card plus high serial pin (FMC+ HSPC) connectors on the VCU118 board. Unveiling the Virtex UltraScale VCU108 FPGA Development Kit Key Features & BenefitsDual 80-bit DDR4 Component MemoryRLDRAM3 (2x36-bit) MemoryDual QSFP28 InterfacesPCIe Gen3 x16 (VCCINT = 0.85V)VITA 57.4 FMC+ InterfaceVITA 57.1 FMC InterfaceSamtec FireFly InterfacePrice and StockRelate Distributors in stock Market price analysisRelated Market price  VCU118 SpecificationsProduct AttributeAttribute ValueManufacturer:XilinxProduct Category:Programmable Logic IC Development ToolsRoHS: DetailsProduct:Evaluation KitsType:FPGATool Is For Evaluation Of:Virtex UltraScale+Brand:XilinxProduct Type:Programmable Logic IC Development ToolsFactory Pack Quantity:1Subcategory:Development ToolsTradename:Virtex UltraScale+Unit Weight:10.582 lbs VCU118 Board FeaturesBoard FeaturesConfigurationOnboard JTAG configuration circuitry to enable configuration over USBJTAG header provided for use with Xilinx download cables such as the Platform Cable USB IIQSPI flash memoryCommunication & Networking10/100/1000 Mbps Ethernet (SGMII) Dual 4x28Gbps QSFP28 cagesSamtec FireFly 4x28Gbps InterfaceDual USB-to-UART Bridge with mico-B USB connectorRJ45 Ethernet connectorPCI Express endpoint Gen3 x 16Expansion ConnectorsFMC+ HSPC connector (24 – 28Gbps GTY Transceivers,  80 differential user defined pairs) FMC HPC1 connector (58 differential user defined pairs) PMOD header IICControl & I/OUser Push Buttons (x5)User DIP Switch (4-position)PMBUS & System Controller MSP430 for power, clocks, SD-Card and I2C bus switchingMemoryTwo 4 GB DDR4 component memory interfaces (five [256 Mb x 16] devices each)4 MB RLD3 component memory interfaces (five [256 Mb x 16] devices each)IIC EEPROM: 8KbMicro Secure Digital (SD) connector 1Gb Quad SPI FlashClockingSI5335A Quad Clock GeneratorSi570 IIC Programmable LVDS Clock GeneratorSI5328C Clock Multiplier and Jitter Attenuator2x SMA MGT Reference Clock inputs1 SMA User Clock inputDisplayUsers & Status LEDsPower12V wall adapter or ATX Known Issues for VCU118 DescriptionThis Answer Record lists all known issues associated with the Virtex UltraScale+ FPGA VCU118 Evaluation Kit. SolutionBoard / Kit Related Issues(Xilinx Answer 68277)Virtex UltraScale+ FPGA VCU118 Evaluation Kit - Driver Support for SGMII LVDS for the VCU118(Xilinx Answer 68521)UltraScale Boards and Kits - Failed to connect to Serial Port when using SCUI.exe(Xilinx Answer 69449)Virtex UltraScale+ FPGA VCU118 Evaluation Kit - Rev 1.0 / Rev 1.1 - U41 is connected to VCC1V2(Xilinx Answer 70146)Virtex UltraScale+ FPGA VCU118 Evaluation KIt - Quick Start Guide update for revision 2.x of the board   VCU118 Datasheet VCU118 Datasheet   FAQ What is the vcu118 Evaluation Board for Xilinx? The VCU118 evaluation board for the Xilinx®Virtex®UltraScale+™FPGA provides a hardware environment for developing and evaluating designs targeting the UltraScale+ XCVU9P-L2FLGA2104 device. What can Virtex UltraScale + FPGA evaluation kit do? The Virtex UltraScale+ FPGA VCU118 Evaluation Kit is ideal for prototyping applications ranging from 1+Tb/s networking, data centers, and fully integrated radar/early-warning systems. What kind of clock generator does the vcu118 use? °Si5335A quad clock generator °Three Si570 I2C programmable LVDS clock generators °One SG5032 fixed 250 MHz LVDS clock generator °Si5328B clock multiplier and jitter attenuator for QSFP °Subminiature version A (SMA) connectors (differential) • 52 GTY transceivers (13 Quads)

Product OverviewThe MUR460 is a single-phase ultrafast Power Diode with lead-free pure tin-plated lead and a molded plastic case. Solderable terminals as per MIL-STD-202, method 208 standards. Color band denotes cathode end polarity. It is suitable for use in switching power supplies, freewheeling, and inverters. CatalogProduct OverviewMUR460 FeaturesMechanical CharacteristicsMUR460 ApplicationsMUR460 PinoutMUR460 SpecificationHow does MUR460 WorkMUR460 Package DimensionsMUR460 ManufacturerMUR460 DatasheetUsing WarningsMUR460 Diode FAQ MUR460 FeaturesUltrafast 25, 50, and 75 Nanosecond Recovery Times175°C Operating Junction TemperatureLow Forward VoltageLow Leakage CurrentHigh-Temperature Glass Passivated JunctionReverse Voltage to 600 Volts Mechanical CharacteristicsCase: Epoxy, MoldedWeight: 1.1 gram (approximately)Finish: All External Surfaces Corrosion Resistant and Terminal Leads are Readily SolderableLead Temperature for Soldering Purposes: 260°C Max. for 10 SecondsPolarity: Cathode indicated by Polarity BandMarking: MUR405, MUR410, MUR415, MUR420, MUR440, MUR460 MUR460 ApplicationsUsed in high-frequency rectificationUsed in freewheeling applicationsEmployed in switching mode convertersIncorporated as an inverter in telecommunication MUR460 PinoutThe following figure shows the pinout diagram of MUR460. MUR460 Pinout This diode rectifier comes with two terminals called anode and cathode. The anode side is positive through which current enters the diode and the cathode side is negative through which current leaves the diode and current moves from the anode terminal to the cathode terminal. MUR460 SpecificationProduct AttributeAttribute ValueManufacturer:onsemiProduct Category:RectifiersRoHS:NMounting Style:Through HolePackage / Case:DO-201ADVr - Reverse Voltage:600 VIf - Forward Current:4 AType:Fast Recovery RectifiersConfiguration:SingleVf - Forward Voltage:1.28 VMax Surge Current:110 AIr - Reverse Current:10 uARecovery Time:75 nsMinimum Operating Temperature:- 65 CMaximum Operating Temperature:+ 175 CPackaging:BulkHeight:5.3 mm (Max)Length:9.5 mm (Max)Product:RectifiersTermination Style:Through HoleWidth:5.3 mm (Max)Brand:onsemiProduct Type:RectifiersSubcategory:Diodes & RectifiersUnit Weight:0.038801 oz How does MUR460 WorkThe working of MUR460 is simple and straightforward. When the voltage is applied to the rectifier diode in such a way the negative terminal of the battery is attached with the n-type semiconductor and the positive terminal of the battery is connected to the p-type semiconductor material, in this condition the diode is forward biased. In this forward biased condition, the free electrons available in the n-type region of the semiconductor experience a repulsive force, and a large number of holes present in the p-type semiconductor also experience a repulsive force. MUR460 Working In this case, the electrons due to this repulsive force start moving from the n-type region to the p-type region and the holes in the p-type region start moving to the n-type region. And the conduction is carried out due to these charge carriers i.e. holes in the p-region and the electrons in the n-region. As this conduction is the result of the movement of free majority charge carriers in the diode, the reason the current in the forward biased condition is also called the majority current. MUR460 Package DimensionsFollowing is package dimensions diagram of MUR460. MUR460 Package Dimensions MUR460 ManufacturerON Semiconductor is driving energy efficient innovations, empowering customers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military and power supply applications. ON Semiconductor operates a responsive, reliable, world-class supply chain and quality program, and a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions. MUR460 DatasheetMUR460 Datasheet Using WarningsNote: Please check their parameters and pin configuration before replacing them in your circuit. MUR460 Diode FAQ① What is the MUR460?Single-phase ultrafast Power Diode. MUR480 Diode designed as a fast recovery rectifier diode with Low forward voltage drop, low reverse current and highly reliable diode. ② Which is the correct definition of a diode?A diode is a device which only allows unidirectional flow of current if operated within a rated specified voltage level. A diode only blocks current in the reverse direction while the reverse voltage is within a limited range otherwise reverse barrier breaks and the voltage at which this breakdown occurs is called reverse breakdown voltage. ③ Can a normal diode break down with a reverse voltage?Zener diodes have a highly doped p-n junction. Normal diodes will also break down with a reverse voltage but the voltage and sharpness of the knee are not as well defined as for a Zener diode. ④ Which direction does a diode flow?The current flowing through a diode can only go in one direction, and we call this state forward-bias. Since the current can only flow in one direction (forward-bias), we unofficially think of diodes as one-way electronic valves.

I DescriptionFirst, this blog will introduce the 1 wire digital temperature sensor DS18B20. We mainly introduce its structure, characteristics, and working principle here. Second, we will introduce a temperature measurement system based on DS18B20 and AT89S52 microcontrollers. Here we mainly introduce its hardware structure and assembler. Third, there will be part of the source program that is detailed analyzed. Finally, the blog also explains how it performs temperature measurement in the agricultural field.The temperature measuring device has a series of advantages. Such as high display accuracy, low price, simple structure, convenient expansion, and wide application.DS18B20 Temperature Sensor TutorialCatalogI DescriptionII IntroductionIII DS18B20 Overview3.1 DS18B20 Advantages3.2 DS18B20 Features3.3 DS18B20 Internal StructureIV  DS18B20 MCU Temperature Measurement Device4.1 Composition of System Hardware4.2 Design of InterfaceV Software DesignVI Application in Agricultural Production6.1 Temperature of Mildew6.2 Temperature of Agricultural Products6.3 Temperature Detection in Greenhouses6.4 Temperature of SoilVII ConclusionFAQOrdering & QuantityII IntroductionWhat is temperature?What are the roles of temperature?Temperature is a physical quantity that characterizes the degree of cooling of an object, and it is also a basic environmental parameter. In agro-industrial production and daily life, the measurement and control of temperature always occupy an extremely important position.At present, a typical temperature measurement and control system consists of the following parts:Analog temperature sensor;A/D conversion circuit;MCU.However, the analog signal output by the analog temperature sensor has to be converted. It can interface with microprocessors such as single-chip microcomputers only after obtaining digital signals through the A/D conversion link. Therefore, the hardware circuit structure is complicated and the cost is high.But DS18B20 can help solve this problem. The new 1 wire digital temperature sensor represented by DS18B20 integrates temperature measurement and A/D conversion and directly outputs digital quantities. The structure of the interface circuit with the single-chip microcomputer is simple, and it is widely used on occasions with long-distance and many nodes. Therefore, DS18B20 has strong promotion and application value.III DS18B20 Overview3.1 DS18B20 AdvantagesDS18B20 type 1 wire intelligent temperature sensor produced by DALLAS Semiconductor Company. It belongs to a new generation of intelligent temperature sensors adapted to microprocessors. Compared with the traditional thermistor, it has the following advantages:It can directly read the measured temperature;The reading mode of 9-12 digits can be realized through simple programming according to actual requirements;It can also complete 9-bit and 12-bit digital quantities within 93.75ms and 750ms, respectively, with a maximum resolution of 0.0625°C;To read or write the information of DS18B20, only one port line (1 wire interface) is required to read and write.3.2 DS18B20 FeaturesUnique 1-Wire® Interface Requires Only One Port Pin for Communication Reduce Component Count with Integrated Temperature Sensor and EEPROM Measures Temperatures from -55°C to +125°C (-67°F to +257°F)±0.5°C Accuracy from -10°C to +85°C Programmable Resolution from 9 Bits to 12 BitsNo External Components RequiredParasitic Power Mode Requires Only 2 Pins for Operation (DQ and GND )Simplifies Distributed Temperature-Sensing Applications with Multidrop Capability Each Device Has a Unique 64-Bit Serial Code Stored in On-Board ROMFlexible User-Definable Nonvolatile (NV) Alarm Settings with Alarm Search Command Identifies Devices with Temperatures Outside Programmed LimitsAvailable in 8-Pin SO (150 mils), 8-Pin µSOP, and 3-Pin TO-92 Packages3.3 DS18B20 Internal StructureDS18B20 adopts 3-pin PR-35 package or 8-pin SOIC package.Its DS18B20 external shape and pin diagram are shown in Figure 1.The DS18B20 internal structure block diagram is shown as in Figure 2.The structure of 64-bit flash ROM is shown in Figure 3.Figure 1. DS18B20 PinoutFigure 2. DS18B20 Internal StructureFigure 3. 64b Flash ROM StructureIV  DS18B20 MCU Temperature Measurement Device4.1 Composition of System HardwareThe DS18B20 single-chip microcomputer intelligent temperature measurement device is mainly composed of the DS18B20 temperature sensor, AT89S52, display module, and power module, as shown in Figure 4.The main technical indicators of the product are:Measuring Range (℃): -55.0~+125.0Measurement Accuracy (℃): 0.1Response Time (s): ≤1.5　　Figure 4. System Structure DiagramThe system uses DS18B20 as a temperature sensor. The one-chip computer AT89S52 of  ATMEL Company serves as the processor. Temperature display and light-emitting diode as temperature control output unit. The whole system strives to have a simple structure and perfect functions.The working principle of the system is as follows: After DS18B20 carries on the field temperature measurement, the measured data is sent to the P3.5 port of AT89S52. The temperature value is displayed after being processed by the microcontroller. Then, this temperature value is compared with the upper limit of the set alarm temperature. If it is higher than the set upper limit, the yellow LED lights up.The main circuit diagram of the system is shown as in Fig. 5.Figure 5. DS18B20 Temperatuer Measurement Device4.2 Design of InterfaceThere are 2 ways to connect DS18B20 to the hardware of the microcontroller:Vcc is connected to external power supply, GND is grounded, and I/O  is connected to the I/O  line of the microcontroller;Use the parasitic power supply, UDD and GND are grounded at this time, and I/O  is connected to MCU  I/O,  Regardless of the 1st or 2nd power supply mode, the I/O  line must be connected to a pull-up resistor of about 4.7kΩ. Figure 6 shows a typical connection between DS18B20 and a microprocessor.In Figure 6(a), DS18B20 adopts parasitic power supply, and its VDD and GNG terminals are both grounded;In Figure 6(b), the DS18B20 uses an external power supply, and its VDD terminal uses a 3~5.5V power supply.This system adopts the wiring mode shown in Figure 6(b), that is, the working mode of external power supply. The actual connection picture of the system is shown in Figure 6.Figure 6. Physical Diagram of System ConnectionV Software DesignIt is worth noting that DS18B20 has very high requirements on two aspects: timing and electrical parameters. Therefore, the work flow of the main CPU accessing the DS18B20 through the single-bus interface must follow a strict operating sequence: first, initialize the DS18B20; second, send ROM commands; and then, send function commands.We can take a look at the following part of the source program is as follows:ORG 0000HAJMP MAIN; Statement of MCU memory allocation!TEMPER_L EQU 29H; used to save the lower 8 bits of the read temperatureTEMPER_H EQU 28H; used to save the upper 8 bits of the read temperatureFLAG1 EQU 38H; Whether the DS18B20 flag is detectedPNFLAG EQU 68H; Data positive and negative flagA_BIT EQU 20H; the single digit of the digital tube stores the memory locationB_BIT EQU 21H; The ten digits of the digital tube store the memory locationC_BIT EQU 22H; The decimal places of the digital tube store the memory locationT_INTEGER EQU 26H; The integer part after FORMAT, which integrates two bytes of temperature into one byteT_DF EQU 27H; The decimal fraction after FORMAT, the decimal fraction of nibble temperature (there are low four digits)MAIN:LCALL GET_TEMPER; Call the temperature reading subroutineLCALL T_FORMAT; Format the read 2 byte temperatureLCALL ALARM; call the alarm subroutineLCALL DISPLAY; call the digital tube display subroutineLCALL D1S; test after a delay of 0.5 secondsAJMP MAIN; this is the DS18B20 reset initialization subroutineINIT_1820: SETB P3.5NOPCLR P3.5; the host sends out a reset low pulse with a delay of 537 microsecondsMOV R1,#2TSR1: MOV R0,#250DJNZ R0,$DJNZ R1, TSR1SETB P3.5; then pull up the data lineNOPNOPNOPMOV R0,#25HTSR2: JNB P3.5, TSR3; waiting for DS18B20 responseDJNZ R0, TSR2; delayLJMP TSR4TSR3: SETB FLAG1; Set the flag bit to indicate that DS1820 existsLJMP TSR5TSR4: CLR FLAG1; clear the flag bit, indicating that DS1820 does not existLJMP TSR7TSR5: MOV R0,#120TSR6: DJNZ R0, TSR6; timing requires a period of delayTSR7: SETB P3.5RET; read the temperature value after conversionGET_TEMPER: ;SETB P3.5LCALL INIT_1820; first reset DS18B20JB FLAG1, TSS2RET; Determine whether DS1820 exists? If DS18B20 does not existThen returnTSS2: MOV A,#0CCH; skip ROM matchingLCALL WRITE_1820MOV A, #44H; Issue temperature conversion commandLCALL WRITE_1820LCALL DISPLAYLCALL INIT_1820; reset before reading temperatureMOV A, #0CCH; Skip ROM matchingLCALL WRITE_1820MOV A, #0BEH; Issue read temperature commandLCALL WRITE_1820LCALL READ_18200; save the read temperature data to 28H/29HRET; Write DS18B20 subroutine (with specific timing requirements)WRITE_1820: MOV R2,#8; a total of 8 bits of data;CLR CWR1: CLR P3.5MOV R3,#6DJNZ R3,$RRC AMOV P3.5,CMOV R3,#23DJNZ R3,$SETB P3.5NOPDJNZ R2,WR1SETB P3.5RET; read the program of DS18B20, read two bytes of temperature data from DS18B20READ_18200: MOV 36H, #2; Set the high and low temperatureRead from DS18B20MOV R1, #29H; the low bit is stored in 29H (TEMPER_L), the high bitDeposit 28H (TEMPER_H)RE00: MOV R2,#8; There are 8 bits of dataRE01: ;CLR CSETB P3.5NOPNOPCLR P3.5NOPNOPNOPSETB P3.5MOV R3,#9RE10: DJNZ R3, RE10MOV C,P3.5MOV R3,#23RE20: DJNZ R3, RE20RRC ADJNZ R2,RE01MOV @R1,ADEC R1DJNZ 36H,RE00RET;-----Integrate the two-byte temperature read out (please refer to the information about the 2-byte temperature format read out by DS18B20) ----------T_FORMAT:;Alarm subroutineALARM:; Display subroutineDISPLAY:; 1MS delay (calculated by 12MHZ)D1MS: MOV R7,#250llmm:nopnopDJNZ R7,llmmRET; 1MS delay (calculated by 12MHZ)D1S: Mov R6,#4LOOP2: mov R5,#125; ------------ 250LOOP1: LCALL D1mSDJNZ R5,LOOP1DJNZ R6,LOOP2RET; 7-segment digital tube 0-9 digit common anode display codeNUMTAB: DB0C0H,0f9H,0a4H,0b0H,99H,92H,82H,0f8H,80H,90H,0ffHXIAOSHU:DB00H,01H,01H,02H,03H,03H,04H,04H,05H,06H,06H,07H, 08H, 08H, 09H, 09HENDVI Application in Agricultural ProductionThis temperature measurement system can directly output digital quantities. In addition, it has the characteristics of simple structure, convenient use and low price. Therefore, it can be widely used in agricultural production.6.1 Temperature of MildewModern grain warehouses can use this system to monitor the temperature of hundreds of points. In this way, you can easily grasp the temperature changes at various points at different times, increase storage capacity, and effectively reduce the occurrence of mildew.6.2 Temperature of Agricultural ProductsAt present, low-temperature refrigeration measures are widely adopted for the preservation of fruits and vegetables. The system can be installed in the temperature measurement position of the refrigerator compartment. In this way, the temperature value can be conveniently observed at any time to check whether the optimal preservation temperature is reached.6.3 Temperature Detection in GreenhousesThe system is used in plastic greenhouses for greenhouse vegetable cultivation and flower production. In this way, automatic temperature display can be realized, and labor and time for temperature measurement can be saved.6.4 Temperature of SoilIn the process of planting crops with strict requirements on soil temperature, the system can test the changes in soil temperature as needed to facilitate the grasp of accurate temperature values.VII ConclusionThe single-chip temperature measurement system takes full advantage of the simplicity of the hardware structure of DS18B20 and AT89S52, using 8-segment digital tube display, low price and wide application. According to actual needs, we can also use LCD as a display device or form a distributed temperature measurement and control system.Although the design is easy to expand, it also has its shortcomings. The simplicity of the hardware structure comes at the expense of software. Therefore, special attention should be paid to the working sequence requirements of DS18B20 during programming.In short, the system can be widely used in temperature measurement in agricultural production.FAQWhat is DS18B20 temperature sensor?The DS18B20 is a 1-wire programmable temperature sensor from maxim integrated. It is widely used to measure temperature in hard environments like in chemical solutions, mines or soil etc. The constriction of the sensor is rugged and also can be purchased with a waterproof option making the mounting process easy.How does the DS18B20 work?It works on the principle of direct conversion of temperature into a digital value. Is DS18B20 a thermistor?A thermistor is a thermal resistor - a resistor that changes its resistance with temperature. Thermistors have some benefits over other kinds of temperature sensors such as analog output chips (LM35/TMP36 ) or digital temperature sensor chips (DS18B20) or thermocouples.How accurate is DS18B20?The DS18B20 reads with an accuracy of ±0.5°C from -10°C to +85°C and ±2°C accuracy from -55°C to +125°C.What is ds1820?The DS18B20 is one type of temperature sensor and it supplies 9-bit to 12-bit readings of temperature. The communication of this sensor can be done through a one-wire bus protocol which uses one data line to communicate with an inner microprocessor.How do I connect my DS18B20 to my Raspberry Pi?Once you've connected the DS18B20, power up your Pi and log in, then follow these steps to enable the One-Wire interface:1.At the command prompt, enter sudo nano /boot/config.txt , then add this to the bottom of the file:2.dtoverlay=w1-gpio.3.Exit Nano, and reboot the Pi with sudo reboot.What is the working principle of DS18B20?The DS18B20 Digital Thermometer provides 9 to 12-bit (configurable) temperature readings which indicate the temperature of the device. It communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. In addition it can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply.The core functionality of the DS18B20 is its direct-to-digital temperature sensor. The resolution of the temperature sensor is user-configurable to 9, 10, 11, or 12 bits, corresponding to increments of 0.5°C, 0.25°C, 0.125°C, and 0.0625°C, respectively. The default resolution at power-up is 12-bit.Where to use DS18B20 Sensor?The DS18B20 is a 1-wire programmable Temperature sensor from maxim integrated. It is widely used to measure temperature in hard environments like in chemical solutions, mines or soil etc. The constriction of the sensor is rugged and also can be purchased with a waterproof option making the mounting process easy. It can measure a wide range of temperature from -55°C to +125° with a decent accuracy of ±5°C. Each sensor has a unique address and requires only one pin of the MCU to transfer data so it a very good choice for measuring temperature at multiple points without compromising much of your digital pins on the microcontroller.How connect DS18B20 to Arduino?First plug the sensor on the breadboard the connect its pins to the Arduino using the jumpers in the following order: pin 1 to GND; pin 2 to any digital pin (pin 2 in our case); pin 3 to +5V or +3.3V, at the end put the pull-up resistor.On an ATMega328P, why is a DS18B20 temperature sensor returning incorrect temperature values?Several possibilities:1. If it is just reading a little high, it might be caused by “self heating”. Add a heat sink and/or make measurements less frequently.2. Especially if the values are really whacky, it might be code with errors or mis-wiring. Use a published sketch to check operation.3. The DS18B20 might be defective. Try another.4. It’s accurate to 0.5ºC.

Product OverviewThe SX1276 transceivers feature the LoRa® long-range modem that provides ultra-long-range spread spectrum communication and high interference immunity while minimizing current consumption. Using Semtech’s patented LoRa modulation technique, SX1276 can achieve a sensitivity of over -148 dBm using a low-cost crystal and bill of materials. The high sensitivity combined with the integrated +20 dBm power amplifier yields industry-leading link budget, making it optimal for any application requiring range or robustness. LoRa also provides significant advantages in both blocking and selectivity over conventional modulation techniques, solving the traditional design compromise between range, interference immunity, and energy consumption. These devices also support high-performance (G)FSK modes for systems including WMBus, IEEE802.15.4g. The SX1276 delivers exceptional phase noise, selectivity, receiver linearity, and IIP3 for significantly-lower current consumption than competing devices. Video: LoRa SX1278/76 Arduino Interfacing Tutorial | Sending Sensor Data Wirelessly with LoRa CatalogProduct OverviewSX1276 FeaturesSX1276 PinoutSX1276 ApplicationsSX1276 Block DiagramSX1276 Circuit DiagramSX1276 SpecificationSX1276 vs SX1272SX1276 ManufacturerSX1276 DatasheetUsing WarningsSX1276 FAQ SX1276 Features168 dB maximum link budget+20 dBm - 100 mW constant RF output versus V supply+14 dBm high-efficiency PAProgrammable bit rate up to 300 kbpsHigh sensitivity: down to -146.5 dBmBullet-proof front-end: IIP3 = -12 dBm100 dB blocking immunityLow RX current of 10 mA, 200 nA register retentionFully-integrated synthesizer with a resolution of 61 HzFSK, GFSK,  MSK,  GMSK, LoRa, and OOK modulationsBuilt-in bit synchronizer for clock recoverySync word recognitionPreamble detection115 dB+ Dynamic Range RSSIAutomatic RF Sense with ultra-fast AFCPacket engine up to 64 bytes with CRCBuilt-in temperature sensor and low-battery indicator SX1276 PinoutThe following diagram shows the pin arrangement of the QFN package, top view. SX1276 Pinout SX1276 ApplicationsAutomated Meter Reading.Home and Building Automation.Wireless Alarm and Security Systems.Industrial Monitoring and ControlLong range Irrigation Systems SX1276 Block DiagramThe following figure shows the block diagram of SX1276. SX1276 Block Diagram SX1276 Circuit DiagramThe following is the circuit diagram of SX1276. SX1276 Circuit Diagram SX1276 SpecificationTypes           SX1276Product Number      LoRa1276-C1Working Frequency      868/915 MHzTransmit Power         20 dBmEmission Current         120mAReceiving Sensitivity-123dBm~139dBm Receiving Current         10.8mATransmission Distance          5 kmAnti-interference Ability         Strong SX1276 vs SX1272SpecificationsSX1276SX1272Frequency bands of operation169 MHz, 433 MHz, 850 MHz to 1 GHz850 MHz to 1 GHzProgrammable Bandwidth7.8 KHz, 10.4 KHz, 15.6 KHz, 20.8 KHz, 31.2 KHz, 41.7 KHz, 62.5 KHz. 125 KHz, 250 KHz, 500 KHz125 KHz , 250 KHz, 500 KHzReceiver SensitivityBetter than SX1272, (down up to -148 dBm)Good (down up to -137dBm)Max. Link Budget168 dB157 dBIIP3-11 dBm-12.5 dBmRx current9.9 mA, 200nA register retention10 mA, 100nA register retentionModulation types supportedSame as SX1272GFSK, FSK, MSK, GMSK, LoRa邃｢ as well as OOK.Dynamic Range (RSSI)127 dB127 dBTemperature sensor and low battery indicationYESYESpacket engine size256 bytes256 bytesBlocking ImmunityExcellent89 dBBit SynchronizerYESYESPreamble detectionYESYES SX1276 ManufacturerSemtech Corporation is a leading supplier of high performance analog and mixed-signal semiconductors and advanced algorithms for high-end consumer, enterprise computing, communications, and industrial equipment. Products are designed to benefit the engineering community as well as the global community. The Company is dedicated to reducing the impact it, and its products, have on the environment. Internal green programs seek to reduce waste through material and manufacturing control, use of green technology and designing for resource reduction. SX1276 DatasheetYou can download this datasheet for SX1276 Datasheet from the link given below:SX1276 Datasheet Using WarningsNote: Please check their parameters and pin configuration before replacing them in your circuit. SX1276 FAQWhat is the modem of the Semtech sx1276 transceiver?The SX1276/77/78/79 transceivers feature the LoRaTM long range modem that provides ultra-long range spread spectrum communication and high interference immunity whilst minimising current consumption. What is a transceiver used for?The transceiver is an important part of a fiber optics network and is used to convert electrical signals to optical (light) signals and optical signals to electrical signals. It can be plugged into or embedded into another device within a data network that can send and receive a signal. What are the characteristics of transceiver?In radio communication, a transceiver is an electronic device which is a combination of a radio transmitter and a receiver, hence the name. It can both transmit and receive radio waves using an antenna, for communication purposes. What is the maximum sensitivity of the SX1276 transceivers?+20 dBm What does LoRa support for systems such as WMBus?High-performance (G)FSK modes

STM32F405RGT6 belongs to STM32 Family STM32F4 Series Microcontrollers. The ARM Cortex -M4 based STM32 F4  series of high-performance MCUs with DSP  and FPU instructions is an extension of the industry-leading STM32 portfolio towards even higher performance. Up to 180 MHz operating frequency.CatalogSTM32F405xx Family OverviewSTM32F405RGT6 DescriptionCAD ModelsCircuit DiagramSTM32F405xx FeaturesSTM32F40xx PackagesSTM32F405xx ApplicationsSTM32F405RGT6 Product AttributeParts with Similar SpecsSTM32F405RGT6 ManufacturerSTM32F405xx Family OverviewThe STM32F405xx family of microcontrollers is based on the high-performance ARM Cortex  -M4 32-bit  RISC  core operating at a frequency of up to 168 MHz They incorporate high-speed embedded memories (Flash memory up to 1 Mbyte, up to 192 Kbytes of SRAM), up to 4 Kbytes of backup SRAM, and an extensive range of enhanced I/Os and peripherals connected to two APB buses, three AHB buses, and a 32-bit multi-AHB bus matrix. All devices offer three 12-bit ADCs, two DACs, a low-power RTC, twelve general-purpose 16-bit timers including two PWM timers for motor control, two general-purpose 32-bit timers a true random number generator (RNG). They also feature standard and advanced communication interfaces.STM32F405RGT6 DescriptionThe ARM Cortex  STM32 F4  05/415 ranges of microcontrollers are for embedded applications. The high-performance STM32 F4  series 32-bit Flash MCU offers floating-point unit (FPU) and digital signal processing (DSP) with industry-standard core architecture.ST’s 32-bit ARM® Cortex™ M4 core operates on the 168 MHz range with integrated peripherals including ADCs, DACs, timers, and a crypto/hash processor (STM32F415 only) which provides hardware acceleration for AES 128, 192, 256, Triple DES, and hash (MD5, SHA-1). ART accelerator and the dynamic power scaling enable low current consumption in run mode.CAD ModelsSTM32F405RGT6 Part Symbol STM32F405RGT6 Footprint STM32F405RGT6 3D ModelCircuit DiagramSTM32F405xx Features1) Core: ARM® 32-bit Cortex® -M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait state execution from Flash memory, frequency up to 168 MHz, memory protection unit, 210 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1), and  DSP instructionsMemories2) Up to 1 Mbyte of Flash memory 3) Up to 192+4 Kbytes of SRAM including 64-Kbyte of CCM (core coupled memory) data RAM4) Flexible static memory controller supporting Compact Flash, SRAM, PSRAM, NOR and NAND memories5) LCD parallel interface, 8080/6800 modes6) Clock, reset and supply management7) 1.8 V to 3.6 V application supply and I/Os8) POR, PDR, PVD and BOR9) 4-to-26 MHz crystal oscillator10) Internal 16 MHz factory-trimmed RC (1% accuracy)11) 32 kHz oscillator for RTC with calibration12) Internal 32 kHz RC with calibration13) Sleep, Stop and Standby modes14) VBATsupply for RTC, 20×32 bit backup registers + optional 4 KB backup SRAM15) 3×12-bit, 2.4 MSPS A/D converters: up to 24 channels and 7.2 MSPS in triple interleaved mode16)  2×12-bit D/A converters17) General-purpose DMA: 16-stream DMA controller with FIFOs and burst support18) Up to 17 timers: up to twelve 16-bit and two 32-bit timers up to 168 MHz, each with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input18) Debug mode19) Serial wire debug (SWD) & JTAG interfaces20) Cortex-M4 Embedded Trace Macrocell™21) Up to 140 I/O ports with interrupt capability22) Up to 136 fast I/Os up to 84 MHz23) Up to 138 5 V-tolerant I/Os24) Up to 15 communication interfaces25) Up to 3 × I²C interfaces (SMBus/PMBus)26) Up to 4 USARTs/2 UARTs (10.5 Mbit/s, ISO 7816 interface, LIN, IrDA, modem control)27) Up to 3 SPIs (42 Mbits/s), 2 with muxed full-duplex I2S to achieve audio class accuracy via internal audio PLL or external clock2 × CAN interfaces (2.0B Active)28) SDIO interface29) Advanced connectivity30) USB 2.0 full-speed device/host/OTG controller with on-chip PHY31) USB 2.0 high-speed/full-speed device/host/OTG controller with dedicated DMA, on-chip full-speed PHY and ULPI32) 10/100 Ethernet MAC with dedicated DMA: supports IEEE 1588v2 hardware, MII/RMII33) 8- to 14-bit parallel camera interface up to 54 Mbytes/s34) True random number generator35) CRC calculation unit36) 96-bit unique ID37) RTC: subsecond accuracy, hardware calendarSTM32F40xx PackagesLQFP64 Package LQFP100 Package  LQFP144 Package LQFP176 and BGA176 PackagesSTM32F405xx ApplicationsAutomation & Process Control, Automotive, Embedded Design & Development, Multimedia, Motor Drive & Control, Robotics, MedicalSTM32F405RGT6 Product AttributeManufacturer:STMicroelectronicsProduct Category:ARM Microcontrollers - MCURoHS:DetailsSeries:STM32F405RGMounting Style:SMD/SMTPackage/Case:LQFP-64Core:ARM Cortex M4Program Memory Size:1 MBData Bus Width:32 bitADC Resolution:12 bitMaximum Clock Frequency:168 MHzNumber of I/Os:51 I/OData RAM Size:192 kBOperating Supply Voltage:1.8 V to 3.6 VMinimum Operating Temperature:- 40 CMaximum Operating Temperature:+ 85 CNumber of A/D Converters:2Number of ADC Channels:4Number of Ethernet Channels:0Number of I2C Channels:2Number of I/Os:40Number of Programmable I/O:40Number of PWM Channels:16Number of SPI Channels:2Number of Timers/Counters:4Number of UART Channels:4Number of USB Channels:2Packaging:TrayData Bus Width:32 bitBrand:STMicroelectronicsDAC Resolution:12 bitData RAM Type:SRAMInterface Type:CAN, I2C, SDIO, I2S / SPI, UART / USART, USBMoisture Sensitive:YesNumber of ADC Channels:16 ChannelProcessor Series:STM32F40Product:MCU+FPUProduct Type:ARM Microcontrollers - MCUProgram Memory Type:FlashSubcategory:Microcontrollers - MCUSupply Voltage - Max:3.6 VSupply Voltage - Min:1.8 VWatchdog Timers:Watchdog Timer, WindowedOscillator Type:InternalPeripherals:DMA, LVD, POR, PWM, WDTLead Free:Lead FreeRadiation Hardening:NoREACH SVHC:No SVHCParts with Similar SpecsSTM32F415RGT6, STM32F205RGT6, STM32F205RGT6TR, and MK22FN512VLH12.Note: Please check their parameters and pin configuration before replacing them in your circuit.STM32F405RGT6 ManufacturerSTMicroelectronics is a French-Italian multinational electronics and semiconductors manufacturer headquartered in Plan-les-Ouates nearby Geneva, Switzerland resulting from the merger of two government-owned semiconductor companies in 1987: "Thomson Semiconducteurs" of France and "SGS Microelettronica" of Italy. It is commonly called "ST", and it is Europe's largest semiconductor chip maker based on revenue. While STMicroelectronics corporate headquarters and the headquarters for EMEA region are based in Geneva, the holding company, STMicroelectronics N.V. is incorporated in the Netherlands.FAQWhat is the maximum operating frequency of the STM32 F4 series?180 MHz operating frequency What does the high performance STM32 F4 series 32-bit Flash MCU offer?Floating point unit (FPU) and digital signal processing (DSP) What is the price of STM32F405RGT6?About $7 currently.

I DescriptionThis blog introduces the power amplifier with NE5532 and LM1875T as the core components. The power amplifier we are discussing here is a high-fidelity two-channel stereo subwoofer power amplifier. Here, we will discuss its methods and procedures, schematic design, assembly and debugging, and speaker production. Hope this blog can provide a good reference for beginners.Figure 1. LM1875CatalogI DescriptionII LM1875T and NE5532 Overview2.1 Power Amplifier LM1875T2.2 Pre-amplification Component NE5532III Composition of Power SupplyIV Assembly and Debugging Speaker4.1 Electrical Inspection4.2 Box ProductionV In the EndFAQOrdering & QuantityII LM1875T and NE5532 OverviewFirst, we introduce the core components that we will use. And then, the basic characteristics of these components. Audio power amplifier is generally composed of the following three parts: power supply, pre-amplifier and post-amplifier.Here, we will use high-efficiency HI-FI power integrated chip LM1875T as the core original. LM1875T adopts a positive and negative 15V dual power supply, the left, and right channels work in OCL mode, and the bass works in BTL mode. As far as the characteristics of LM1875T are concerned, it has the characteristics of good sound quality, good frequency response, low cost and relatively simple circuit.In addition, the pre-amplifier part uses the NE5532 integrated operational amplifier.2.1 Power Amplifier LM1875TLM1875T has excellent performance. Many luxury-looking active speakers, mid-range power amplifiers, and subwoofers on the market use LM1875T. The power amplifier circuit composed of LM1875T chip has the following characteristics:The output power is large, the maximum power can reach about 20W;The static current is small, the load capacity is strong, and the dynamic current is large, which can drive 4～8Ω speakers;The circuit is simple, easy to manufacture and low cost;With an internal protection circuit, it is a high-fidelity power amplifier component with stable performance.The blog design of this article is a dual-channel stereo subwoofer power amplifier, but LM1875T is a mono-channel power amplifier integrated circuit, so the dual-channel OCL working mode uses one LM1875T for each channel. Since the bass works in BTL mode, we have to use two pieces.LM1875T has 5 pins. They are positive power supply, negative power supply, positive input, reverse input, and output. The circuit is shown in Figure 2.Figure 2. LM1875 Circuit2.2 Pre-amplification Component NE5532Before the power amplifier circuit, it is generally necessary to add a preamplifier. The purpose of this is to amplify the voltage of various input weak electrical signals. In order to ensure that the output electrical signal has high fidelity, the pre-amplifier is NE5532. NE5532 is a high-performance, low-noise, dual operational amplifier integrated circuit. Compared with many standard op amps, NE5532 has better sound performance, excellent output drive capability, relatively high small signal bandwidth, and large power supply voltage range. Therefore, it is very suitable for high-quality and professional audio equipment, instruments, control circuits and telephone channel amplifiers. When used for audio amplification, the tone is warm and high fidelity.The functional block diagram of NE5532 is shown as in Fig. 3.Figure 3. NE5532 Functional Block DiagramIII Composition of Power SupplyLM1875T adopts a positive and negative 15V dual power supply. The operating voltage of NE5532 is also ± 15V. We need to step down the mains power to 15V through a step-down transformer, then rectify it through the rectifier bridge KBL406, filter it through a large capacitor, and directly supply it to the power amplifier. In this way, larger output power is obtained. After 7815 and 7915, the regulated output ±15V is used as the power supply of the preamplifier NE5532. The composition of the power supply is shown in Figure 4.Figure 4. Power CircuitFigure 5. Power Amplifier Circuit BoardIV Assembly and Debugging SpeakerWhen starting the circuit installation, first check the circuit board against the circuit diagram. For example, check whether the main components are installed correctly, and whether the solder joints have missing soldering or false soldering. Then turn on the power to debug the circuit, and make speakers after the debugging is completed. The actual production is shown in Figure 6.　　Figure 6. Physical Shooting Pic 4.1 Electrical InspectionUse an AC signal generator to add a tiny sinusoidal signal to the signal input. Then, use the oscilloscope to measure the three output signals of the power amplifier board. At this time, observe whether the sine meets the requirements and whether the parameters in the test are relatively stable.Then, connect two full-range speakers to the left and right channels, and connect a woofer to the bass output port. At this time, add the song signal to carefully check whether the three speakers are working properly and the sound is good. If the above steps are well expressed, then proceed to the next step.4.2 Box ProductionThe key to making speakers is the selection, size and other steps. In the experiment, we used the laminates in the laboratory for splicing and assembly.First, draw a sketch. The painting is divided on three different substrates, and then made into two parts respectively. After drilling, polishing, splicing and bonding, the completed circuit parts are installed in their respective parts.Then, we divide the entire power amplifier into three parts. Two satellite speakers, as well as a woofer and power amplifier board. These three parts together form a complete 2.1 subwoofer power amplifier. Here, there is a place that needs special attention. When making the bass part of the cabinet, the impact of vibration should be fully considered. Therefore, we have to design damping components.V In the EndAfter the installation is normal, connect the music signal source and listen to the music effect. The sound reproduced by this circuit has a strong sense of hierarchy, a clear sense of orientation, and an obvious sense of space and distance. In addition, the sound image orientation is clear, the width is outstanding, and the sound dynamic range is large, giving people a real feeling.FAQWhat is the Maximum Input Offset Voltage of LM1875T?15@±25V mV What is the Output Type of LM1875T?1 Channel Mono What is the Output Signal Type of LM1875T? Single-Ended What is the Case of LM1875T? TO220-NDH5D What is the Output power of LM1875T?25W