Arduino based pulse induction metal detector

FoxyLab

Junior Member
Joined
Dec 22, 2015
Messages
60
Location
Belarus
My project foxyPI v2 - pulse induction Arduino based metal detector
Video: https://youtu.be/ikJbqUCbyvw
Schematic:
foxyPIv2.png

Description (in russian): http://acdc.foxylab.com/node/47
 
FoxiPI v2

Hi Alexander

on your site we are the only source for FoxiPI v1.
for FoxiPI v2?
congratulations for the effort

bay alphagrby9 (renato)
 
Test targets:
foxyPIv2_tgts.jpg

foxyPIv2_tgts_2.jpg

Search depth:
1 - 34 cm
2 - 26 cm
3 - 19 cm
4 - 12 cm
5 - 9 cm
6 - 2 cm
 
Test targets:
foxyPIv2_tgts.jpg

foxyPIv2_tgts_2.jpg

Search depth:
1 - 34 cm
2 - 26 cm
3 - 19 cm
4 - 12 cm
5 - 9 cm
6 - 2 cm

I'm not sure I understand this thread, Is this a machine going into production or a school project? I don't mean to sound discouraging but taget #6 looks to be the size of a quarter at less than 1in. and target #1 (manhole cover?) at 13in. Can you clarify what type of project this is?
 
I'm not sure I understand this thread, Is this a machine going into production or a school project? I don't mean to sound discouraging but taget #6 looks to be the size of a quarter at less than 1in. and target #1 (manhole cover?) at 13in. Can you clarify what type of project this is?

No, this is DIY project in topic "Make It Yourself". What is wrong?
Target #1 - HDD plate.
Target #6 - smallest USSR's coin (1 kopeika).
 
No, this is DIY project in topic "Make It Yourself". What is wrong?
Target #1 - HDD plate.
Target #6 - smallest USSR's coin (1 kopeika).

Nothing wrong, just curious is all. There wasn't very much info in your op. Didn't mean any disrespect in questioning depths, I have a P.I machine that gets considerably more depth and thought you were designing a production unit. Regardless your understanding of this technology is impressive and good luck with your project.
 
Looks promising :neat:

I built quite a few PI detectors myself, based on Microchip PIC controllers.

One of the reasons of your low sensitivity might be the 10x flyback pulse amplifier.
Normally, this is 1M/1K = 1000x if you have a single amplifier.

Also, the battery voltage to monitor is the 12V, not the 3V.

But I like the Arduino approach !
 
Looks promising :neat:

I built quite a few PI detectors myself, based on Microchip PIC controllers.

One of the reasons of your low sensitivity might be the 10x flyback pulse amplifier.
Normally, this is 1M/1K = 1000x if you have a single amplifier.

Also, the battery voltage to monitor is the 12V, not the 3V.

But I like the Arduino approach !

I use a comparator instead of the ADC, so I deliberately reduced the gain to reduce noise.
Detection of a small coin from a distance of 10 cm is enough for me. Large targets defines of half a meter or more:
this can - 80 cm
foxyPIv2_tgts_3.jpg

Monitoring the battery 3 Volt made because its failure would lead to complete failure of the device. Lowering the battery voltage of 12 volts within reasonable limits will only lead to a loss of sensitivity.
Thanks for your feedback!
 
Im still waiting

to see some pics of the circuitboard and coil? Whats the voltage on this unit. Whats included? volume, pulse delay? threshold? Sensitivity?


fill me in . I like to tinker and build. I may be interested?
 
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