Mini FM Transmitter
Posted by
Ciaran Haslett on
Sep 01, 2015; 11:08pm
URL: http://guitar-fx-layouts.238.s1.nabble.com/Mini-FM-Transmitter-tp24106.html

Using an Electret capsule as input. The Trim Cap sets the frequency at which it transmits. Apparently good up to 1/4 mile. Frequency range from 87 -108MHz. Check your countrys Radio Spectrum licence laws.
Video with schematic
here