1 way voice transmission circuit

Thread Starter


Joined Nov 19, 2007
Hi All

Just wondering could anyone point me in the right direction of were i could get a schematic to build a walkie talkie type system.

The transmitter side just needs to transmit voice (does not need to be able to recieve)

the reciever side needs to just recieve voice from the transmitter.

Looking it to work over 100-150 meters and hopefully work from a 9 volt battery.

Anyones input to this would be greatly appricated or guidance on how to do this.



Joined Jul 22, 2007
Search for FM microphone or FM bug. Look for ones with atleast 2 transistors, or a crystal is better. Any FM radio could be used as the reciever. Not sure of 100 meters is considered legal. FM transmitters have been a popular project since before transistors, so find a circuit you have parts for already shouldn't take much search on the web, or even on this site.