This circuit is a small FM transmitter, capable of carrying its signals over short distances (maximum of around 50 m), depending on the range of the receiver. The components are all common, not causing any type of problem for the less experienced assembler. The coil consists of six turns of common connecting wire, with an ornament or derivation on the third turn, that is, right in the center. It can be wrapped around a common pencil and has an air core. The figure shows the circuit of our small transmitter, whose final assembly is extremely small.