Old infrared remote controls can be a great way to interface with your projects. One of [AnalysIR’s] latest blog posts goes over the simplest way to create an Arduino based IR receiver, making ...

He connected a 7805 voltage regulator to the 12v supply for the router and used it to power an IR receiver module and an ATmega328. Because the serial port of the router needs 3.3v he uses a zener ...