F.A. Keyboard Firmware

Rotary Encoder with NeoPixels and USB Interface

Collection of various development boards for microcontrollers (e.g., CH55x, CH32, PY32, STC8, STM32) and accompanying example software.

An Open-Source CMSIS-DAP Debug Probe based on DAPLink and USB bus convert and it can realize USB convert to serial interface based in CH552, low-cost of $3 dollars

USB controlled I²C OLED

An ISP flashing tool for the WCH CH55x, CH579, CH32F103 under linux

Simple ISP Flash Tools for various Microcontrollers

Programmable MacroPad with Rotary Encoder and NeoPixels

An Advanced BadUSB

Simple Board that can be used as a Mouse Jiggler, a Rubber Ducky or a Caps Blocker

USB controlled nRF24L01+ 2.4GHz Transceiver

CMSIS-DAP compliant debugging probe with SWD, JTAG, and VCP support

Programmable Macropad with NeoPixels

CMSIS-DAP compliant SWD Programmer

QMK for 8051

🦾 Firmware for a cheap CH552G macro keyboard off AliExpress/Amazon to "touch" a comma three from a comfortable position

A library to automate Nintendo Switch games using CH55x microcontrollers.

CH55x Pinout

FAK user configuration repository