Cat.1 DTU extended version

Introduction: With 485 interface, Quectel EC600N-CN module is used as the communication module, and a 20pin custom interface is reserved.

Schematic PCB

STLinkV2.1 VCP

Introduction: A STLinkV2.1, supporting ST32 Debug+Mass storage+VCP. In the hardware part, the capacitor, resistor and LED are all packaged in 0805 for easy DIY. The firmware uses ST official firmware, supports upgrading to the latest version, and all functions are normal.

Schematic PCB

STM32103ZET6 expansion board LCD12864 platform icedundun

Introduction: STM32F103 ZET6 expansion board based on LCD12864 platform icedundun board

Schematic PCB

Waveform recognition

Introduction: Question J of the 2021 Electronic Competition (Periodic Signal Waveform Parameter Identification) related design ideas, principles, codes, and demonstration videos.

Schematic PCB

[Internet of Things] Hongmeng Switch

Introduction: Use Hongmeng system to control switches

Schematic PCB

Resistor-capacitor buck and MP150 chip

Introduction: switching power supply

Schematic PCB

STC89C52RC/STC12 core board

Introduction: STC89C52RC core board, a microcontroller in LQFP44 package

Schematic PCB

STM F405 flight control bf inav flying machine fixed wing flight control

Introduction: F405 flight control, MPU6500 gyroscope, low cost. 20, 30 hole double version. The PCB file is in the attachment, and the bf and inav ground stations are connected to the USB cable to flash the firmware. Automatic return test video https://b23.tv/GcbdOsY

Schematic PCB

MATEK F411 fixed wing flight control

Introduction: MATEK F411 fixed-wing flight control STM32F411+MPU6500 gyroscope single panel. Two sets of serial ports, 1 soft serial port.
Adjust the BEC on the back of the PCB to 5v in the attachment before soldering.

Schematic PCB

[Internet of Things] Hongmeng IoT Smart WIFI Switch

Introduction: Use the Hongmeng Hi3861 chip combined with the servo to achieve WIFI remote control of physical switches in your home or dormitory.

Schematic PCB

DC Electronic Load

Introduction: This system uses the STM32F103 microcontroller as the control core and adopts the PID closed-loop regulation algorithm to realize the constant current (CC) and constant resistance (CR) working modes of the electronic load. Each module can work stably and the system has high control and measurement accuracy.

Schematic PCB

STM32H750 test board

Introduction: None

Schematic PCB

2021 Question B - Three-phase AC-DC conversion circuit makes money relying on the team

Introduction: 2021 National Competition Question B

Schematic PCB

[Internet of Things] Hongmeng IoT Smart WIFI Switch

Introduction: Use Hongmeng Hi3861 combined with a servo to achieve remote control of physical switches in your home or dormitory

Schematic PCB

STM32F427 core board

Introduction: STM32F427 core board, with FLASH, case, crystal oscillator, CH340 automatic download, OTG

51 microcontroller simple heart-shaped lamp - version 3

Introduction: Pattern heart-shaped running water lamp based on STC89C52RC

Schematic PCB

Core board-CH554G

Introduction: Core board-CH554G
The CH554 chip is an enhanced E8051 core microcontroller compatible with the MCS51 instruction set from Qinheng.

Schematic PCB

5.8g image transmission automatic frequency search/sweep

Introduction: Applicable to rx5808

Schematic PCB

ATTiny45_Player_SD

Introduction: A player produced by ATTiny45, please give me a thumbs up

Schematic PCB

STC32G12K128-LQFP48

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

Schematic PCB