4tronix-Pi Step 2-Dual-Quad-Stepper-Motor-Controllers-for-Raspberry-Pi-4tronix-PISTEP2Q-p-This-quad-b-stepper-motor-b-control-board-is-designed-for-use-with-all-versions-of-the-Raspberry-Pi-with-the-40-pin-GPIO-connector-This-neat-little-board-plugs-directly-into-the-Raspberry-Pi-GPIO-header-&-provides-4-connectors-for-stepper-motors-There-are-various-power-options-powered-from-the-Raspberry-Pi-5V-micro-USB (Universal Serial Bus)-5V-from-the-2-pin-terminal-voltage-dependent-on-motor-requirements-br-b