So if I were to build a simple AM radio transmitter just using say, my Arduino, an oscillator, and wire for an antenna (this is all crude I know, but work with me here) and use it to transmit data collected or what have you, how do I receive and decode this signal? I understand if I'm using say an MP3 player and the same idea I could just tune in to the frequency of the oscillator on a modern AM radio, but I want to send and receive data.
I get the basics of the transmitter side, but I don't grasp the receiver side as well. I'd also prefer to only receive the signal I sent out, so only receive on the 1.2 MHz channel, or what have you, if that's possible. What I'm saying is I don't want a tunable receiver, rather just a receiver fit for the transmitter's exact frequency, in a perfect world.