How do I create an inductive switch?

[bobleny]

How do I create an inductive switch?

I know you can buy them, but I'd like to make one.

Does anyone have any one know where I can find a circuit diagram of a simple inductive switch?

Thanks!

[Hero999]

It's basically a metal detector for which there are plenty of schematics on the Internet.

[bobleny]

Good idea, I did not think about that.

Thanks!