5. FM Transmitter Kit
One of the easiest, simplest ways to make an FM transmitter is to buy this kit from BuildCircuit. It’s amateur friendly, so anyone should be able to use it. What you need for assembling this transmitter is a Q1 Transistor-2N3904, capacitors-4.7pF, 20 pF, 0.001uF, 22nF, a variable capacitor, resistors, an electret microphone, and an inductor. For the antenna, you can use a 15cm to a 1-meter long wire (the longer the antenna, the better the signal). This is a short range transmitter with a transmission range of about 10-20 meters. Follow these steps and the FM transmitter circuit diagram, to make a super easy FM transmitter.
Andor Bujdoso/Shutterstock.com
