A very small home made FM transmitter Bug using a single transistor and with a transmission range of 200 meters. This FM transmitter Bug is very easy to build. The size of the circuit board is ONLY 22mm x 10mm.
To make the PCB, using the toner transfer
method and Ferric Chloride.
Schematic
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PCB
Parts used Building a super spy bug transmitter video tutorial
Home made PCB
2n3904 transistor
4.7p ceramic capacitor
1n ceramic capacitor
22n ceramic capacitor
1 – 5p to 30p air trimmer
360R resistor
4.7K resistor
10mm Mic
35cm antenna
Battery Plug
Some solder
19mm heatshrink
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