FM Wireless Mic

Posted on Nov 2, 2012

FM Wireless Mike can transmit voice signals to any FM Radio receiver 100 meters away. The circuit is basically a frequency modulated transmitter working at 100 MHz. The frequency of the transmitter can be varied slightly by changing the trimmer C5. You can use ordinary condenser mike in this circuit. The transistors can be replaced by any low power transistors like BC148 or BF494.

FM Wireless Mic
Click here to download the full size of the above Circuit.

The coil L1 is air core 6 turn 24 SWG. Third turn is tapped and connected to telescopic antenna. You can replace telescopic antenna with a small piece of wire.

Leave Comment

characters left:

New Circuits



Popular Circuits

Room thermometer with LEDs
Dual over-under temperature monitor
Resistive Sensor Head (A2053) Manual
build solid state scrtriac controlled
arduino circuit
The many ideas of 100 watt amplifier circuit
L297/298 Stepper Motor Controller