Showing posts with label I. Show all posts
Showing posts with label I. Show all posts
Thursday, December 11, 2014
D I Y Gold Detector Schematic
Here the very simple and easy build gold detector circuit.The circuit capable to sense gold or metal or coins from a distance of about 20cm, depending on the size of the object to detect.The circuit oscillates at ab out 140kHz and a harmonic of this frequency is detected by an AM radio.You can simply tune the radio receiver until a squeal is detected.
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