【Training Camp】A lackey

Introduction: Introduction: Based on the OpenHarmony open source Hongmeng system development, the core board can control sixteen servos, all interfaces are brought out, with reserved burning ports and I2C interfaces, and can support PCA9685 finished multi-channel servo control board.

Open source agreement: GPL 3.0

Schematic PCB

2021 Question A - Signal Distortion Measurement Device

Introduction: This work designs and manufactures a signal distortion measurement device, which uses a 32-bit MSP432 development board as the control core, and its periphery consists of a low-pass filter circuit, an adjustable amplifier circuit, a polarity conversion circuit, a zero-crossing comparison circuit, etc. The test results show that the design has the characteristics of high accuracy and fast response.

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Radio based on RDA5807FP+PAM8403DR

Introduction: Radio V2.0 based on RDA5807FP. The power amplifier circuit has been changed. PAM8403DR chip is used for external amplifier and the headphone interface has been changed.

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Wireless serial port remote download module, based on CH9143 Bluetooth serial port usb three-way module

Introduction: Based on the CH9143 three-way module of Qinheng Microelectronics, it adds the function of remote downloading of programs, and can also be used as USB to TTL. The cost is much lower than the wireless burning programmer sold by tb, and it cannot be simulated.

Schematic PCB

67W Small Portable PCB Heating Station

Introduction: 67W Small Portable PCB Heating Station

FM5324GA charge and discharge module snowflake lamp base

Introduction: Battery charge and discharge module based on FM5324G, snowflake lamp base

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Heated control panel (verified)

Introduction: Everyone has been working on a heating table recently to make it easier to solder boards. I also made a small control board with the things I had on hand. I did not use PID control. It may be added later.

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ZVS induction heating 1kw

Introduction: 1kw ZVS induction heating, basically all circuits (large areas of copper cladding) have windows to ensure current carrying capacity

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mini usb docking station

Introduction: USB docking station based on SL2.1A

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8-channel logic analyzer

Introduction: This is the smallest logic analyzer with a shell on the open source platform. 8-channel logic analyzer based on CY7C68013A-56LTXI

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Bilibili TV version 2.5

Introduction: Bilibili small TV peripherals part

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Bilibili Small TV 2.0

Introduction: Bilibili Small TV 2.0 Master Control

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STM32G070RBT6 core board

Introduction: STM32G070RBT6 minimum system.

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STM32G070CBT6 minimum system core board

Introduction: This project is the STM32G030CBT6 minimum system.

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PCB picture text

Introduction: Use PCB pictures to decorate PCB boards.

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USB docking station based on MA8601

Introduction: This design is a docking station made of the basic MA8601 chip, which realizes the function of one to four. There are a total of 6 USB interfaces, of which 4 have USB functions and the other two only have charging functions.

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Tactile Rubik's Cube and Pulse Summary

Introduction: Read the piezoresistive sensor signal, amplify it, and communicate using Bluetooth

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STM32F103Z_BGA core board

Introduction: STM32F103Z_BGA package core board

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3D printer WiFi SD card large card 8266

Introduction: WIFI SD card for 3D printer, passed the large card test

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3D printer WIFI SD card small card

Introduction: WIFI SD card for 3D printer, small card has not been tested yet

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