I am fresh to the electrical engineering, and actually I am a web developer, ruby and php, etc. I am wondering that is there a simple way to control one or more LED lights using iPhone without wifi connection? I know there're already some great inventions of led bulbs, but I'd like to go in a much cheaper way, sort of like the tv controller:
I use iPhone to send certain frequency signal, and the led lights receive it and turn on or off.
Any guide will be appreciated.