Bug Detector Plans are required when you want to create a basic bug detector. You may want to create bug detectors for many reasons, just for fun, or to take pride in telling your friends that ‘hey I have created a bug detector’.
What you will need:
(the number in brackets is a reference number which matches the schematic. The number in paranthesise is the amount of the part needed.)
 (1) 1n34a crystal diode
 (2) 2n107 audio transistors (ge-2 or equivalent)
 (1) 3k ohm variable resistor
 (2) 560 ohm 1/2 watt resistor
 (1) 15k ohm variable resistor
 (1) 500 ohm variable resistor
 (1) .002 Uf capacitor
 (1) 1.5 Volt aa battery
 (1) aa battery holder
 (1) 0-300 microammeter (lafayette 99-g-5028 or equivalent)
 (1) 10 millihenry choke (ohmite z-50)
 (1) single-pole single-throw (spst) toggle switch
 (1) project box (radio shack)
 (1) antenna (either from an old transistor radio or a stiff piece of wire will also work)
 (1) 2000 ohm headset (or a miniature earphone like most tv and radios use)
the parts can be purchased from radio shack for less than $20. This is a very good high-gain meter-type bug detector. It has a crystal diode with 2 amplification stages to boost the power of the meter. This produces a broad-band, battery-powered, receiver that can sense radio-frequency transmitters up to a mile away. Unfortunately, it will also pick up a commercial am or fm station up to 3 miles away
Bug detector schematics:
With Bug Detector Plans in hand you will be able to easily create this amazing device.
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