Human machine interfaces (HMIs) often incorporate light indicators. One option for HMI indicator technology is light pipes. In this article, learn some of the design considerations for choosing and using light pipes.
January 14, 2022 by Sannah Vinding, VCC
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