The STC32G128K microcontroller development board includes two LEDs, independent buttons, an I2C 4-line OLED display, an SPI 7-line TFT display, a 10K potentiometer, a photoresistor, a GN1302 real-time clock, a passive buzzer, supports USB and serial port downloading, and exposes all I/O ports.
The AD630 lock-in amplifier is a high-precision balanced modulator that uses a unique signal processing mechanism to extract target signals of specific frequencies and phases from complex signals.
The AD630 is a high-precision balanced modulator that combines a flexible commutation architecture with laser-tuned thin-film resistors for accuracy and temperature stability. Its signal processing applications include balanced modulation and demodulation, synchronous detection, phase detection, quadrature detection, phase-sensitive detection, lock-in amplification, and square wave multiplication. An on-board resistor network provides accurate ±1, ±2 closed-loop gain with an accuracy of 0.05% (AD630B). These resistors are used to precisely configure the multiplexer gain to +1, 2, 3, 4. Alternatively, external feedback allows designers to implement high-gain or complex feedback topologies.
The following is a physical image:
AD630 Lock-in Amplifier.ms14
PDF_AD630 Lock-in Amplifier.zip
Altium AD630 Lock-in Amplifier.zip
PADS_AD630 Lock-in Amplifier.zip
BOM_AD630 Lock-in Amplifier.xlsx
93590
"32Pi_Zero" - Development board based on STM32F103+ESP
1. Objective: To design an inexpensive IoT development board with abundant peripherals, suitable for beginners;
2. Features: This development board has relatively rich basic peripherals, suitable for beginners and electronics enthusiasts;
3. Note: This solution has been tested on a pre-built board. Those without circuit knowledge should use it with caution.
I. Project Introduction:
Design a low-cost IoT development board with rich peripherals for teaching purposes. The board will be designed and developed using CUBE, combined with embedded operating systems such as FreeRTOS, to enable users to become familiar with bus and peripheral development.
II. System Features
: Main Control Chip: STM32F103C8T6;
WIFI Module: ESP12S (ESP8266 core)
; Functional
Peripherals : GPIO 4, LED
External Interrupt 4, KEY, PWM, BUZZ , I2C, OLED, U8G2, SSD1306 , I2C, EP2ROM, AT24C02 , SPI, Flash, LittleFS , W25Q16 Timer, Infrared Receiver (IR), ADC , Photoresistor, AUX, UART , WIFI , Arduino Development, ESP-12S (ESP8266) , GPIO, Digital Tube, Serial Data Transmitter (74HC595). III. Physical Demonstration . IV. Precautions: This system is powered by a Type-C interface, with a power supply voltage limit of 5V. V. Demo Videos: Various tutorials will be uploaded to Bilibili later: https://space.bilibili.com/26064574?spm_id_from=333.1007.0.0 VI. Open Source Repository : https://gitee.com/watsonhuang/32pizero
6b79ecc6b400e5bc9d95cc61ff667587.mp4
f0e4505f783461774ec32c2ea60885c7.mp4
PDF__32Pi_Zero_-Development board based on STM32F103+ESP.zip
Altium__32Pi_Zero_-Development board based on STM32F103+ESP.zip
PADS__32Pi_Zero_-Development board based on STM32F103+ESP.zip
BOM__32Pi_Zero_-Development board based on STM32F103+ESP.xlsx
93591
STC32G12K128 Development Board
Microcontroller Creative Design Competition, STC32G12K128 Development Board
The STC32G12K128 core board is also compatible with the STC8H8K64U chip. It features one onboard EEPROM and one NOR flash.
Firmware can be easily downloaded by connecting the core board to a computer.
The back of the board includes pinouts and the STC logo.
STC32G12K128.mp4
LED Test Program.zip
PDF_STC32G12K128 development board.zip
Altium_STC32G12K128 development board.zip
PADS_STC32G12K128 development board.zip
BOM_STC32G12K128 development board.xlsx
93592
Mornsun Auxiliary Power Supply
This project uses an auxiliary power supply module based on Mornsun's URD480512YMD-10WR3. Essential for the electronics design competition!
This project uses the auxiliary power supply module based on Mornsun's URD480512YMD-10WR3, LCSC online store number (C6731983), with an input range of 18-75V (if such a wide input voltage range is not required, the URB series can be used instead, which will be much cheaper). It includes an onboard RT9013 to convert 5V to 3.3V.
Students participating in electrical engineering competitions can refer to this design to avoid the hassle of designing their own auxiliary power supply.
PDF_Mornsun Auxiliary Power Supply
Altium_Mornsun Auxiliary Power Supply.zip
PADS_Mornsun Auxiliary Power Supply.zip
BOM_Morsun Auxiliary Power Supply.xlsx
93593
electronic
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