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HELP!!! Metal detector????????

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Rehal

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Hello, i have a college project to build a metal detector. i have found that i need a CS209A chip. i cannot find where to buy this type of chip. pls could some 1 help me where to buy this from or does some1 have 1 for sale.
Pls could you get back to me asap or do u know of any simple metal detector circuits that will not need this chip.
Thanks Pitsy
 
Rehal, I don't mean to be rude, but how did you manage to find this forum, but apparently have not done a Google search for "metal detector schematic"? I got a lot of hits when I did it. Here is one result of that search. There are several other good sites.
 
This is a proximity switch from ON Semiconductor.
 

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