How to control a load or a motor by turning it ON or OFF. In this lesson, we learn how to use the module with FR120N, LR7843, and D4184 MOSFETs to turn ON/OFF a DC load up to 10A. HW-532 is optically isolated from a 5V to 30V load up to 10A, depending on the module. The schematic is shown, the wiring diagram is explained, and different methods of wiring with a push button and potentiometer are also shown. In Project 1, we simply Start/Stop.