My power scheme (24pin ATX + 4-pin) seems to be working as intended. The momentary switch is superceded by a relay to keep the PSU active once the CM is powered on. At this time, Safe powe-down ...

For RP2040-based boards, the USB programming uses .uf2 format file that can be copied to the virtual USB drive that shows up in USB bootloader mode, which is enabled with DIP switch. In addition to ...

To achieve this, [Made in Poland] put together a purely electromechanical drive controlled with momentary rocker switches and automotive relays to form a simple H-Bridge for each motor.