Use of IR (infrared) light as a method for wireless communication has become popular for remote control applications. There are a number of different standards for such communication. In this application note the widely used RC5 coding scheme from Philips will be described, and a fully working remote control solution will be presented. This application will use the Atmel® ATtiny28 AVR® microcontroller for this purpose. This powerful unit contains a hardware modulator, a high current LED driver, and interrupt options, which makes it especially well suited for these kinds of applications.