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FM VCO Transmitter This is a VCO FM Transmitter with range 500m - 4km depending on antenna used
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Power supply: 12-14 V
stab., 100 mA
This circuit originally published on www.pira.cz but a new PCB design is introduced here. Connect the 6 V / 0,1 A
bulb to the output and use R1 to tune the right frequency. Maybe you
might stretch coils of the L1. Then use C14 and C15 to adjust the
highest power (the highest light of the bulb). Then you can connect
antenna and audio signal.
Eagle CAD PCB layout
3D PCB rendering PCB Dimensions PCB Photo
assembled PCBs
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