Tracking an infrared light source is not as difficult as you might think; a 14-pin PICAXE, a stepper motor with a driver IC, three phototransistors, and a few other components will do the trick.
January 17, 2017 by Charles R. Hampton
Learn how to build a variety of electronic controllers using the Raspberry Pi. In part one, you will learn how to wire a basic pushbutton switch and read the status of its electrical contacts using the Python programming language.
November 19, 2015 by Don Wilcher