The DC Motor Plug is a small board containing two H-bridges to drive two small DC motors or a stepper.
The board uses an I2C I/O expander to support the two motor drivers as well as 4 freely available I/O pins.
The motor drivers are based on the TC4424 chip, which is mainly intended for driving MOSFET chips,
but which happens to also work well to drive small motors forward or
backward. Motors with stall currents up to about 1.5 A should work just
The PCB Only version contains just the printed circuit board for the DC Motor Plug. No parts, no headers.
The documentation and full design details are freely available.