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Metal Detector Devices
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Sensors Monitors Measurement
>> Metal Detector
Metal detector uses single IC
uses a beat-frequency technique to detect coins and other metal objects near the search coil
http://www.edn.com/archives/1997/121897/26di_02.htm
Build your own metal detector
http://home.clara.net/saxons/diy.htm
Metal detector
http://www.geocities.com/tomzi.geo/metal_detector/metal_detector.htm
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