PI discrimination is possible

[Teleno]

Slowing down the LR tc will give thicker skin depth.

A PI has to settle for a coil inductance adapted to the tau's of the itended targets. If you're hunting for large taus you'd better use a larger inductance in your coil. This will slow down the turn-on accordingly and allow you to discriminate in your target range.

There's no universal solution for any coil to detect and discriminate any target. A PI can only be optimised with a certain type of targets in mind.

[ODM]

Your system, your choices. Just discussing the facts, if it is welcome. No hostility.

[daverave]

and what? Mustafa does PI's with the disc like cooking hot dogs!
https://www.youtube.com/watch?v=uEXe5N0ZlZE

and all are without the arduino )

Hi kt315...ive looked many times at the mustafa videos and although the video's look impressive im not that much convinced cause they always waive a sheet of copper in front of the coil and ferrous pliers which of course will give a good signal...you hardly ever see a small ferrous nail or small gold ring waived in front of the coil...ok great looking lcd displays but do they have the depth on low conductive items and does the discrimination work at good depth on small ferrous items ?????? when you ask questions to these people they never answer which makes me very suspect of their technology.

[Teleno]

Hi kt315...ive looked many times at the mustafa videos and although the video's look impressive im not that much convinced cause they always waive a sheet of copper in front of the coil and ferrous pliers which of course will give a good signal...you hardly ever see a small ferrous nail or small gold ring waived in front of the coil...ok great looking lcd displays but do they have the depth on low conductive items and does the discrimination work at good depth on small ferrous items ?????? when you ask questions to these people they never answer which makes me very suspect of their technology.

And, most importantly, "all without the Arduino". Mustafa has pasted a whole PC + oscilloscope all over his metal detector, but as long as there's no Arduino then it's OK. kt315 doesn't hate bloated hardware, only Arduinos.

I wonder what Physics are behind Mustafa's curtain of GUI bells and whistles, but I have the impression he doesn't care as long as customers get hypnotized by the screen show and buy.

[daverave]

What comes first to me is depth on low conductive items....i cannot understand why a pulse machine has to have a menu system and many parameters like as in the mustafa videos....without good depth and discrimination what the hell with menu driven displays !!!! im sorry but im not convinced with mustafa's detectors...plus he cannot even be bothered to answer questions.

[kt315]

And, most importantly, "all without the Arduino". Mustafa has pasted a whole PC + oscilloscope all over his metal detector, but as long as there's no Arduino then it's OK. kt315 doesn't hate bloated hardware, only Arduinos.

I wonder what Physics are behind Mustafa's curtain of GUI bells and whistles, but I have the impression he doesn't care as long as customers get hypnotized by the screen show and buy.

i can add especial points or a connector for the arduino on Bara and DP pcbs. only say what connect to.
i do not see a problem.