As an example circuit Marc brought the schematic of a micro television transmitter (designed by Tetsuo Kogawa) which can transmit video signals that can be received by a common analog television with an antenna. The first thing to learn was how to design a circuit layout in the free available Eagle software: First decide which parts are needed, place and connect them to a schematic which than can be converted into the proper board layout. If it would be that easy…

Eagle  Files: Download

Source: FabLab

step by step