Metal Detectors!

yo fellow electronic geniuses . i am trying to build a simple metal detector, and have found an awesome simple schematic drawing while surfing the world wide web. however the main component is a cs209a proccessor chip. having spent hours searching for this wretched piece of kit, i have dicovered it has been dicontinued.
does anyone out there know of a chip that has the exact same characteristics and where i may purchase a couple incase i blow it up on my first attempt? pease say there is such a chip so i dont have to spend another week trying to find another lamens schematic.
i am part of an electrical HNC2 group so im not too clued up on heavy electronics. thank you. :wink:

The CS209 is a proximity-switch, not processor. As metal detector - i don't believe - can detect more as 15...20cm in free air with 30cm antenne...

**broken link removed**

manual for a velleman kit metal detector... scematic is in the manual

Sebi said:

The CS209 is a proximity-switch, not processor. As metal detector - i don't believe - can detect more as 15...20cm in free air with 30cm antenne...

Click to expand...

Exactly !! CS209 is switch and know only work of switch. It can not process of metal signal and can identify it. Thats what I know.

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