FM Transmitter

FM transmitter based on 2N3904 transistors, with range of about 50m. The coil L1 is constituted by 8 to 10 turns of wire 22 rolled in a non-conductive 6mm diameter. C4 is a small trimmer adjustable, the resistors are 1/8 but can also be used 1/4 and capacitors capacitors,wire antenna can be adjusted from 10 to 15cm.  

Fm Transmitter PCB