Sensitive FM Transmitter Bug

Posted on Feb 5, 2014

This easy to build FM transmitter bug can transmit voice to exceptionally good range. Tune trimmer to hear the signal to your near radio. Transmitter frequency range is 88-108 MHz. Max current consumption is 30mA. You can power the fm transmitter bug with a 9Volt Battery, or you can plug a power supply to feed in 9-12 Volts. That bug will pick even a low whisper or even the sound of a breath well far from the microphone. Great spy transmitter equipment. .

Sensitive FM Transmitter Bug
Click here to download the full size of the above Circuit.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    LED bar peak program meter display for audio
    Basement LEDs
    Simple Cell Phone JammerCircuit 2
    Triac regulation of mains voltage
    Robot Trains in the Garden motor control circuit
    Simple Zener Diode Tester
    Conditioning A/V Signals for RF Modulation
    Switching power supply drive circuit