Open-source boards designed in KiCad by M-C-machts on GitHub, from 4 repositories. A board’s address here is its repository’s there.
M-C-machts/INA228-V-A-Meter
KiCad 9 PCB featuring an INA228 and Seeed XIAO ESP32-C3 for simultaneous voltage/current measurement and logging, powered by a LiFePO₄ battery with USB-C charging via the XIAO port.
M-C-machts/electronic-load-xy-fz25_esp32c3
A custom PCB and firmware add-on for the XY-FZ25 electronic load, replacing the built-in measurement front-end with a more accurate solution based on the Seeed XIAO ESP32C3 and an INA228 high-precision power monitor.
M-C-machts/XIAO-LiFePO4-Power-Module
LiFePO4 charging + 3.3V power module in Seeed Studio XIAO form factor, with battery voltage sense
