Open-source boards designed in KiCad by Jay-Tech on GitHub, from 2 repositories. A board’s address here is its repository’s there.
Jay-Tech/GrblHAL-Sender
8-channel opto-isolated high-side switch board, driven by a Raspberry Pi Pico over USB-C. Takes a 5–24 V field supply and sources it to screw terminals, so shop wiring carries a robust signal instead of 3.3 V logic.
Jay-Tech/WirelessPendant
Firmware for a wireless handwheel pendant for a grblHAL machine, and for the receiver board that carries it to the PC.
Jay-Tech/GrblHAL-Sender
8-channel opto-isolated high-side switch board, driven by a Raspberry Pi Pico over USB-C. Takes a 5–24 V field supply and sources it to screw terminals, so shop wiring carries a robust signal instead of 3.3 V logic.