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Simple FM Transmitter Circuit Schematic

This is a simplest FM transmitter circuit schematic with a single transistor. It build with a very few numbers of components include a transistor, few capacitors, resistors and a small microphone.

Circuit Diagram 


Circuit Description

A S9014 NPN transistor is used here; you can use BC547 as an alternative of it. All the capacitor used in circuit is . Don’t be surprised with the supply voltage of 1.5 volt. Here you can use a single 1.5V AA battery cell, or a 3V battery that will be endurable for this this FM transmitter circuit. A small microphone used here is an electret condenser type microphone (see below). Must use at least a small antenna for a higher transmitting-range. Then try with a bigger antenna for increasing range. 

Transistor S9014 Pinout

Electret condenser type microphone



If you have any confusion about capacitor value, check .

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