Learning about how infrared remote controls work is a great way to expand your electronics knowledge. That’s because this technology is invisible to our eye, and happening faster than we can … ...

The circuit of IR burglar alarm system comprises transmitter and receiver-cum-alarm sections. It works off 6V DC, 500mA uninterrupted supply and uses low-cost readily-available electronic components.

Because the module contains a 38-KHz pulse generator, you can save a few code lines and, of course, one or two I/Os of your microcontroller when making advanced infrared projects. See the schematic ...

Tired of loud TV ads? In 2012, Peter de Bruijn built the Mini-Mute — a clever circuit that let him mute his TV with a simple tap on the coffee table. Here's how it works.

This effectively regenerates the carrier signal that the IR receiver module had removed. Finished circuit on prototype board. The output is then fed into a transistor configured as an emitter-follower ...