Bug Detector with Beep


Bug Detector with Beep

Parts List:
R1 = 390 ohm, 5%R2 = 390 ohm, 5%C1 = 1000uF, 10VC2 = 1.5uF, 10VC3 = 3.9nFC4 = 20pF, trimmerC5 = 10nF (0.01uF or 103)IC = 7413 or 74LS13 (2)

Please note: This circuit is not open for discussion.Although working perfectly, it was experimental.I will answer no emails in regards to this circuit.
If you are looking for a more serious and reliable bug detector, go to the Countersurveillance Monitor article on the Circuits Page.



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