LOW_COST_METAL_DETECTOR_FOR_EXPERIMENTERS

Published:2009/6/17 22:33:00 Author:May | From:SeekIC

This circuit is on oscillator with L1 being a 4 diameter coil of 35 turns of #26 magnet wire.Metal in proximity to L1 will cause the oscillator to shift frequency. An AM transistor radio is used to detect the frequency shift.



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