Infrared Tech Is Decades Old – Why Does Almost Every TV Remote Use It?

Bluetooth may seem the obvious next step in the remote's evolution, but there are reasons that infrared hasn't died out.
EDN

IR Remote Control Basics

Depressing a button on a modern Consumer IR, CIR, remote control causes a 940nm LED to blink. As the LED toggles a pulse stream of infrared light is generated. The pulse stream is a pattern which ...