Sean Michael Ragan from Make built this Micro FM Transmitter. If you are looking to get some audio onto the radio over a short distance this project could be for you. The copper layer of the board looks very cool.
“This circuit is commonly credited to Japanese multimedia artist Tetsuo Kogawa. It takes audio input through a 1/4″ phono jack and, constructed as shown, without the optional antenna connections, will broadcast an FM radio signal about 30 feet.”
