Treasures Finding Boots EPE Mini Metal Detector

[Funfinder]

We still need real working treasure-shoes !!! Rather than some "corrupted" felezoo stuff!

The electronic and coil is pretty small so its useful for shoes.

[Skippy]

I have a 3/4 built one of those. But I did improve it, by replacing that crappy diode OR-gate circuit with a proper XOR gate & low-pass filter, using a tiny-logic IC (5 pin SOT-23 package). A regulated, properly decoupled power supply is needed, too.
It's a tricky circuit, though. The RC and LC oscillators drift, in different ways. The RC oscillator is capacitance sensitive, so needs shielding or it will drift when your hand is near.

I was thinking of adapting it to use a micro size inductor, to make something like a Periscope Probe. I did some tests with SMD inductors (100 & 220 microhenries) and it had potential.

[kt315]

i do not collect BFO's information. you will not see that on DVD-ROM with the archive you got. no deep sense.

[Funfinder]

I have a 3/4 built one of those. But I did improve it, by replacing that crappy diode OR-gate circuit with a proper XOR gate & low-pass filter, using a tiny-logic IC (5 pin SOT-23 package). A regulated, properly decoupled power supply is needed, too.
It's a tricky circuit, though. The RC and LC oscillators drift, in different ways. The RC oscillator is capacitance sensitive, so needs shielding or it will drift when your hand is near.

I was thinking of adapting it to use a micro size inductor, to make something like a Periscope Probe. I did some tests with SMD inductors (100 & 220 microhenries) and it had potential.

Good to know!
Perhaps its better to use one of those motion detector circuits from handheld security detectors (those who have a "ring").
http://anhuapolice.en.made-in-china....-Military.html