Hello everyone, this is my first post in allaboutcircuits.com or any forum for that matter. Forums seem like a great way to learn, so Im going to stick around awhile to see what its all about. As of right now Im trying to come up with a very simple digital transmitter and receiver. I was thinking something like high frequency low frequency transmission to represent binary 1s and 0s. Does anyone know of any resources to go about designing such a circuit or have any ideas? Thanks!