donnyjaguar
Senior Member
I've been searching for this for quite a while and have found on the web. http://www.volny.cz/kachlik.jan/
Its missing the MCU portion of the circuit but that's largely unimportant from a modifications standpoint. The operating frequency is determined by the inductance of the search coil - this was a surprise. I see the cause of the bug that makes pinpointing impossible on certain metals. I can see an easy modification for going a little deeper too - although stabilizing it may be a challenge. Will have to study some more of course and welcome thoughts from other technoids on improving this interesting circuit.
Its missing the MCU portion of the circuit but that's largely unimportant from a modifications standpoint. The operating frequency is determined by the inductance of the search coil - this was a surprise. I see the cause of the bug that makes pinpointing impossible on certain metals. I can see an easy modification for going a little deeper too - although stabilizing it may be a challenge. Will have to study some more of course and welcome thoughts from other technoids on improving this interesting circuit.