pi pinpointer schematic with discriminator

[usefi5961]

hello,has anyone pulse induction pinpointer with discriminator schematic?and coil detail?please share it.

[kt315]

your eyes are not the discriminator? take a magnet touch a metal and you will see a gold.
PS. with holy mantra from Quran certainly on your lips. just cause thats black magic trick.

[Tim]

usefi it would need to be a VLF/LF or IB to discriminate. The basic rules of thumb are the smaller the coil the smaller the metal able to be detected, but at less distance. And the higher the discriminate level the less sensitivity to wanted metals. Probably the best would be a LF IB circuit with zero centreing meter or separate tones for ferrous and non-ferrous. Connected to a ferrite cored probe with transmit and receive windings.
Alternatively you could just make a probe for your favourite (non-PI) detector.
Out of interest a Sunray probe for a Garrett Ace/GT/GTAX on ebay today was US$286+postage.

[chevesne]

Try Teemo's one

[usefi5961]

thank you very much for help me.

[chevesne]

Try Teemo's one

http://www.geotech1.com/forums/showt...tector-project