Coinshooter IB Metal Detector

by William Lahr
This project is originally from the old Popular Electronics, August 1981. The version I have is from the 1984 Experimenter's Handbook, an annual compilation of Popular Electronics articles. This is strictly an amplitude-type detector and does not look at phase information, thus it cannot discriminate between precious metals and junk, although it does differentiate between ferrous and non-ferrous targets.
Coinshooter IB Metal Detector (PDF-226K)
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