- Joined Oct 21, 2019
yes sir, i have this schematic and its works well. and second thing is that i need a receiver circuit for that transmitter for the wireless communication between between the transmitter & receiver. your help will much be appreciated.Many people have built simple FM transmitters that have problems that I solved when I fixed them:
1) The radio frequency changes when the battery voltage runs down as it is used. So I added a voltage regulator.
2) The radio frequency changes when something moves towards or away from the antenna. So I added an output buffer amplifier to isolate the oscillator from the antenna.
3) The sound is muffled with no high audio frequencies when heard on a normal FM radio. So I added pre-emphasis like all FM radio stations have and it matches the de-emphasis in all FM radios.
Here is the FM transmitter I designed and built and it works well and sounds great: