Buck-single-turn dual power strip

Introduction: During the preparation for the electronic competition, I accumulated some proven power boards. This time I open sourced two single-turn dual power boards, one of which can output 3V3 with high current and low ripple.

Portable mini heating table V2.0

Introduction: The PID temperature control heating stage based on STM32F103C8T6/C6t6 is very convenient and easy to use. The new version has a self-made menu UI, which can adjust various parameters through the encoder. It is more practical than the first version and also enhances stability. ,Multi-PD protocol support.

Schematic PCB

Spectrum light based on ESP32

Introduction: Various special effect spectrum lights based on ESP32/arduino nano.

Schematic PCB

65w portable heating table

Introduction: The PID temperature control heating stage based on STM32F103C8T6 is very convenient and easy to use. It can display parameters through OLED and control the operation with an encoder.
As for why I want to do this project, I mainly made this heating table for the sake of portability, cheapness and low power.

Schematic PCB

ST-Link V2.1

Introduction: Self-made ST-Link V2.1 not only realizes the ST-Link download function, but also adds the serial port function to realize one-line download program and serial port debugging function.

Schematic PCB

Handheld photography fill light

Introduction: This is a handheld photography fill light, or photography light.
Use lamp beads RA=95; there are three power consumption brightnesses, and are equipped with 3D printed shells to choose from.

Schematic PCB

[Internet of Things] Hongmeng Smart Switch

Introduction: None

Schematic PCB

Type c female port housing fixing bracket

Introduction: Well, I haven’t used it. I haven’t done any actual welding demonstration. This is used to fix the shell. The fixing piece of the Type C female socket. The opening for the screw is very small. You need to expand the required holes by yourself.

Schematic PCB

Very compact CKLink-Tiny[verified]

Introduction: A very compact CKLink debugger, suitable for W800 series chips, supporting virtual serial port

Schematic PCB

speechless

Introduction: qwq

Schematic PCB

STLINK-V2.1 with virtual serial port VCP

Introduction: The board drawn by Lichuang Open Source stlink-v2.1 with virtual serial port is too big and not good-looking, so I draw a smaller one myself.

Schematic PCB

[Internet of Things] Hongmeng IoT Smart WIFI Switch

Introduction: Hongmeng Smart WIFI Switch

Schematic PCB

Bingdundun key chain

Introduction: Bingdundun keychain 7.9*7.9cm

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

15V schematic

Introduction: 15V powered Walkman speaker

Schematic PCB

STM32103ZET6 expansion board LCD12864 platform icedundun

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

Schematic PCB

STM32F103RCT6 development board

Introduction: stm32f103rct6 development board

Schematic PCB

410_UFI_HUB

Introduction: The expansion board for 410 UFI uses SL2.1A as the Hub master

Schematic PCB

UFI_HUB_RJ45_Share

Introduction: Add TF card and wired network to the USB expansion designed for 410UFI

USB expansion of portable WIFI

Introduction: Make a USB expansion for portable WIFI flashed with 410