I'm kinda new to the whole R/C thing, and I was wondering about a slightly more creative way of doing things...
I want to control a robot, or tell it what to do, by transmitting different pitches of sound in the range of 4000Hz to 8000Hz.
Dont worry to much about how the robot itself moves, just that I need a way to transmit the sound (not much of a problem), and receive a minimum of four pure pitches in the range, for forwards, backwards, left and right.
So, to simplify the circuit, lets just make a board with four LEDs on it to start off. Wait! Rather 5, one for power (i often forget to turn on circuits).
So how can I get the right LED to light up when it hears the right pitch sound?
I'll play the sound directly from the computer for now, so we don't have to worry about the mic circuit until later (so we'll just plug the current circuit in where the speakers would plug in).
Lets power it with a 9V battery, chuck in a 16F628 for later and viola!
Gimmie a suggestion please!