Controlling a Stepper Motor with an SIRC Transmitter and Receiver

Part one of this project described the principles of IR (infrared) signaling in general, and the SIRC (Sony Infrared Remote Code) in particular. A receiver circuit was presented to detect, decode, and display the information contained in the SIRC signals using a PICAXE microcontroller. Part two of the project will build on that foundation by revisiting the 28BYJ-48 unipolar stepper motor that was introduced in a prior article. In addition, an IR transmitter circuit will be presented that is easy to build and use with the home-built receiver and a ULN2003A and that allows us to remotely start, stop, and control the rotational direction of the stepper motor. The appropriate code will be included for both the SIRC transmitter and receiver.”