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 ...

An IR-reciever to learn the commands from the remote of your tv. An WiFi-bridge to FM or 433Mhz. Then every device has a (trans)reciever with IR-Led stuck to the front end.

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 ...