FM Transmitter


Posted on Sep 30, 2012

Here is the schematic, PC board pattern, and parts placement for a low powered FM transmitter. The range of the transmitter when running at 9V is about 300 feet. Running it from 12V increases the range to about 400 feet. This transmitter should not be used as a room or telephone bug.


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

# L1 and L2 are 5 turns of 28 AWG enamel coated magnet wire wound with a inside diameter of about 4mm. The inside of a ballpoint pen works well (the plastic tube that holds the ink). Remove the form after winding then install the coil on the circuit board




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Temperature Control switch
Analog Mains Frequency Meter
Bench top power supply
Slide-show-timer
Audio Fader
Sawtooth Converter
Rotate a stepper motor using a computer
traffic simple
555 Timer Astable calculator for Astable Multivibrator Designing
Power supply circuit design
ESR Meter
TDA8560 class B power amplifier circuit design project
Quick On-Board Junction TesterCircuit
GSM/GPS Localizer with SIM908 module
Simple Schematic for VCA mixer
Monostable circuit diagram of the use of video amplifiers and comparators



Top