MOSFET transistors for switching and power control: N-channel types such as the IRF3205, IRFZ44N, IRF540 and IRFB4110, and the small 2N7000. Check the drain-source voltage, the continuous current, Rds(on) and the gate threshold: logic-level MOSFETs can be driven directly from 3.3 V or 5 V.