Raspberry Pi RP2040 development board

Introduction: The Raspberry Pi pico development board is improved, and the original circuit is modified and upgraded. The overall dimensions and pin definitions are basically consistent with the official ones, and perfectly adapt to the official expansion boards.

Schematic PCB

PCB backing plate

Introduction: Dimension Grid + Package Specification Table

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32u2 minimum system

Introduction: atmega32u2 minimum barebone system

Schematic PCB

STC32G12K128-LQFP48

Introduction: STC32G12K128-LQFP48 is the smallest system board with no problem in functional verification.

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12344

Introduction: ULN2003

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F1C200S development board that supports three screens

Introduction: Source project based on the open source board modified by AI_QY boss
: https://www.oshwhub.com/AI_QY/f1c100s_1

Schematic PCB

TJU.BINGDD

Introduction: Tianjin University Begonia Festival & Bingdundun Dream Linkage
uses PCB to customize Bingdundun that belongs to Tianjin Master
Bilibili: Electric Wheat
(the original author of this work is a bilibili: Expo classmate)

Schematic PCB

gesture recognition device

Introduction: Based on the basic principle of parallel plate capacitors, the copper plate capacitance value is read through FDC2214. Compare with the threshold to determine the current gesture, display the result by TFTLCD, and announce the recognized gesture by the voice module. And a human-machine battle system is added, and any person can play a guessing game with the system after training.

Schematic PCB

z2m&& zigbee2mqtt gateway

Introduction: The project mainly includes serial communication between the 8266 minimum system and the zigbee minimum system. The sub-device data collected by zigbee assumes the coordinator function and is sent to the 8266 through the serial port. The 8266 reports to the HA through the local wifi.

Schematic PCB

[Graduate Design] Two-dimensional lidar

Introduction: Two-dimensional tof lidar
360-degree range measurement without blind spots

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LCR measuring instrument

Introduction: LCR measuring instrument

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Waveform detection and parameter measurement instruments

Introduction: This work is a waveform detection and parameter measurement instrument that can identify sine waves, rectangular waves, triangle waves, etc....

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8*8 dot matrix--51 development board

Introduction: 51 development board, expansion module 8*8 dot matrix LED

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4*4 matrix button ss

Introduction: 4*4 matrix key expansion board

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esp32 development board wroom_32D_zgf_20220427

Introduction: Designed an esp32 development board, using model esp32-wroom-32E, with automatic download function

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audio power amplifier

Introduction: 15V powered audio amplifier

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ne555cd4017 water lamp

Introduction: The familiar NE555 and CD4017 water lamp, but this time it is made into a ring, and all the components are plug-in, which does not require a high welding threshold and can be used for viewing and practicing welding skills.

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GSY-PD

Introduction: Laser amplitude modulation drive current

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WHOOPICK light panel

Introduction: Using w2812b-2020 led and 1.25mm jst connector

Schematic PCB

Smart building fire protection system based on Huawei LiteOS

Introduction: This project is a smart building fire protection system based on Huawei LiteOS. The main technologies include sensors, LiteOS, NB-IoT, 2G, Huawei Cloud, etc. Developed based on the Bear School smart smoke sensor case.

Schematic PCB