Homemade astronaut-themed thermometer and hygrometer

Introduction: This project uses ESP32 master control and SHT31 temperature and humidity sensor.

Schematic PCB

Multi-signal generator composed of LM324 and 74LS00

Introduction: This is the self-assessment training of the 19th Guangzhou Institute of Navigation Electronic Information for the 2019 electronic competition retest questions. Review the use of operational amplifiers, RC circuits, NAND gates, etc. from this project, which is very comprehensive.

Schematic PCB

espWatch4.1

Introduction: Small watch made using ESP8266-12f

Schematic PCB

[Open Source XRC Remote Control] Version 4.1 updated, the data is open source

Introduction: The XRC remote control is a multi-functional open source remote control based on the STM32F4 platform, with a Chinese interface, 32 channels, 3.5-inch capacitive screen, supports ELRS tuner, supports Mavlink protocol, supports picture browsing, e-books, video playback and NES Games, gravity sensing.

Schematic PCB

ESP32-PICO-D4 Development Board

Introduction: ESP32-PICO-D4 development board

Schematic PCB

CP2108 USB to 4-way uart serial port module

Introduction: USB to 4-way uart serial port module using CP2108 chip

Schematic PCB

CH340-ESP series fast programmer

Introduction: USB automatically burns esp series chips, pin headers or test pins can be used

Schematic PCB

Based on Hongmeng Hi3861 main control 16-channel servo control board

Introduction: 16-channel servo control board based on Hongmeng Hi3861 main control. The servo control chip is PCA9685. Address pins A0-A5 are all grounded, and the address is 0x40. This circuit board can be used to control robotic arms, robots, etc.

Schematic PCB

matrix clock

Introduction: Refer to https://oshwhub.com/350508a/1588AURju-zhen-shi-zhong. Magically change the size to make it white.

Schematic PCB

【Yatelian】Two-way smart switch

Introduction: A two-way wireless smart switch designed based on the Yatelian CB2S wireless WIFI module.

Schematic PCB

[Training Camp] Wa Weili, who has a robotic arm

Introduction: A four-legged bionic robot dog based on the HI3861 Hongmeng system control, and uses the ASR speech recognition module for voice control. The dog has a built-in STM32 minimum system and OpenMV camera for object recognition and information feedback. Who would say no to an obedient little Gogou! ! !

Schematic PCB

GDF330CBT6 verification board

Introduction: The small board integrates gd32f330cBT6 and stc15w408as-35 and lora chip ra01. The board is small, the functions have been verified, and all MCU pins have been verified

Schematic PCB

【Development Board】HI3861 Development Board

Introduction: Based on the OpenHarmony open source Hongmeng system development, all interfaces are brought out, with reserved burning port and I2C interface, which can support PCA9685 finished multi-channel servo control board.
Contains lithium battery charging module.

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.

Schematic PCB

Scan wifi on and off control

Introduction: Car station-car wireless SSID detection power outage

Schematic PCB

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.

Schematic PCB

[Internet of Things] Hongmeng Lighting

Introduction: 11111111111111111111111111111111111111

Schematic PCB

mini usb docking station

Introduction: USB docking station based on SL2.1A

Schematic PCB

ESP8266 heating stage

Introduction: EPS8266 400W upgraded heating table

Schematic PCB

Bilibili TV version 2.5

Introduction: Bilibili small TV peripherals part

Schematic PCB