How to Remote Control a Thing
Ever wanted to make things come alive via remote control - similar to a car key fob? The Parallax Key Fob 433MHz Remote Control Development Kit (RS Stock No. 843-0812) is a great way to do it.
The board requires a 5V input - the fob comes with a pre-installed 12V battery.
The data sheet shows which pins on the board go high when a key fob button is pressed.