Using this code, we can control the speed of a motor using an Arduino and a module with FR120N, LR7843, and D4184 MOSFETs to turn on/off a DC load up to 10A. The 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 2, we control the speed of the motor using Arduino code.