Telephone FM Transmitter

Descrition & Circuit

This project is taken from www.electronics-lab.com.

With some modification, I create my own version of FM Telephone bug complete with stripboard layout.

Theortically, the frequency range is from 88MHz to 94MHz but you may experiment with the coil structure to tune it

Circuit

Strip Board Layout

Parts List

Diode	IN4384	4
	LED	1
Resistor	12k	1
	1k	1
	200R	1
Capacitor	470p	1
	330p	1
	25p	1
	12p	1
Transistor	A933(PNP)	1
Coil	*See note	1

*Coil note

7 or 8 turns of 22AWG(diameter .6mm) around 9/64inch(3.6mm) drill bit. Antenna using the same wire 22AWG, 5inch long

Picture

Compact!





With antenna!



Put it online!



Get ready to tune your radio!