st-linkv3mods-adapter board

Introduction: stlink-V3 downloader universal adapter board

Schematic PCB

Screen verification board based on ESP32-S3R8

Introduction: A screen solution verification board based on ESP32-S3R8, which can test screens with 3/4-wire SPI, 8/16-bit MCU, and RGB565 interfaces. Verified.

Schematic PCB

switching power supply

Introduction: Switching power supply, flyback, input and output isolation; AC input voltage VAc is 170~264V, output current is 2.0A, output voltage is 12V (+1.5%), and output ripple voltage is less than 240mV;

Schematic PCB

ST25DV solution verification board

Introduction: A verification version of the st25 solution based on st’s official “ANT7-T-ST25DV04K” evaluation board. Passed program verification and can be used

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Zhongjingyuan 1.54-inch ips screen module

Introduction: This screen was bought by a certain treasure, and a board was drawn on it.

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[Internet of Things] Hongmeng Smart WIFI Switch +4226863A

Introduction: Using Hongmeng Hi3861 chip to realize WIFI remote control of physical switches

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Laser page turning pen

Introduction: Laser page turning pen, connected via Bluetooth, lithium battery charging

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DDS Arbitrary Waveform Generator

Introduction: FPGA implements DDS arbitrary waveform generator

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Rectifier circuit board

Introduction: Power amplifier board rectifier circuit board

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UTC TDA2050L single power supply standard circuit

Introduction: Single power supply 1875, 2030, 2050L circuit

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TDA7265 two-channel standard circuit

Introduction: TDA7265 two-channel standard circuit

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LM1875GC

Introduction: LM1875T reverse amplifier circuit

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LM4766 power amplifier module

Introduction: LM4766t two-channel power amplifier board, 2x40w, AC dual 18v power supply.

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Hunan Agricultural University Card

Introduction: The front is a full view of the school map, and the back is the QR code of the team’s official account and the school motto.

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Lantern - Hidden Blue Luo Yawen & Li Yongxin

Introduction: First Prize in the 2022 Electrical and Electronic Breathing Lamp Design Competition of the School of Electrical Engineering of Guangzhou City Polytechnic Institute

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numKeyBoard

Introduction: A simple digital keyboard is made, the main control is STM32F103C8T6, and the firmware is QMK.

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buck/boost

Introduction: Minimalist ultra-high voltage BUCK or BOOST board (digital power supply series)

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OPPO watch2 FOR ONE PLUS CY 2077

Introduction: oppowatch2 adapter board for OnePlus Cyberpunk 2077 watch holder

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ESP8266-SW2812

Introduction: Made casually, relatively rough

Schematic PCB

Quadruped bionic mechanical dog based on HiSilicon HI3861 module expansion

Introduction: A four-legged bionic mechanical dog based on the HiSilicon HI3861 module, but it is not completely bionic, and the four legs can go their own way. Due to various reasons, the function needs to be improved.

Schematic PCB