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Metal dedector or treasure Finder

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ted

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coin finder pi circuit

You can search for example the U.S. patent data base, and of course our old friend Google...

The patent office is at http://www.uspto.gov/patft/

Ted
 

marie65

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metal detector bratsk city ru

Here are some schematics.
Regards
 

klug

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circuit diagram rusian metaldetector

Hi,

Two very interesting constructions on AT90S2313 are here:

http://home.skif.net/~yukol/russian.htm

First FM (coin 25 mm is detected on 0.1 m) is on English:

http://home.skif.net/~yukol/MetalE.htm

Second construction, best one (coin 25 mm is detected on 0.25 m, also working under water), on pulse method is only on Russian:

http://home.skif.net/~yukol/TrackerPIR.htm

Circuit diagram:

http://home.skif.net/~yukol/pi1/pi1sch.gif

The author on the beach:

http://home.skif.net/~yukol/report4.htm

73! klug.
 

S

sick_man

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metal detector schema cs209a

ted said:
You can search for example the U.S. patent data base, and of course our old friend Google...

The patent office is at http://www.uspto.gov/patft/

Ted
if you visit the russian site above
he has 60 or so patent documents you can download

dont just welly in a download them all

do as ted recomends then look for the numbered full document on the russia metal site youll find them all there {just about} and also a few on geotech
 

Nick C.

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schema metal detector

The heart of the circuit is a single IC the CS209A made by Cherry Semiconductor. The detector, is a single 100uH choke. The IC has an integral oscillatorm the choke forms part of an external LC circuit, its inductance being altered by the proximity of metal objects. It is the change in oscillation that is amplified and demodulated. Led 1 will light and the buzzer will sound when the choke change sinductance. Set up is easy, VR1 is adjusted with the cjoke away from any metal source so that the LED lights and buzzer sounds. The control is backed off so that the LED goes out and buzzer stops. Now when the choke comes into contact with any metal object that alters its inductance, LED 1 and the buzzer will activate.
 

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