Hello. I am new to electronics. I want to build a very simple piece of equiptment. What I want to build is a transmitter that you can listen to on any radio reciever that sends out a beeping noise, but as you get closer to the reciever the beep gets faster and faster, and as you get further away the beeps are spread apart longer. Its a lot like that beeping device from that movie Aliens. Anyway, it sounds like a simple thing to do. Does anyone know how I would get started? I can build a simple receiver that transmit my own voice over a short distance.