PIM-2 Digital Metal Detector Project

[detecto]

@detecto, do you have v06 or v05 version? I am experimenting with v05 and with the exception of the usage limit it is a hihgly recommeneded soft- and hardware, at least for me.

I have v0.5 software in my PIM-2, discrimination works ok, and results are even bether than i toth. With 30cm coil 24 windings of 0.4mm giwing good results, dumper is 680ohm 1W.
Gold ring 2g abouth 17cm
1e coin 32-33cm
1l paint box over 1m
pertinex 12*12cm over 1.2m
Computer case over 1.7m
I am planing to make one round coil 50cm, and one square coil 1x1m.
I tested it indore, and i have a lot of EMI, so it couses a little instability outdore will be better. What version of software do you have?
Generaly i am satisfied with PIM-2.

[turboaleks]

I use the v05 hex. As sonn as my battery pack arrives, i will post you distance with 1 € coin (using the "default" coil from the turkish forum). As i only have "dirty" power supply at he moment, my results are not as good as yours. Would be interesting to know, if there is much improvement with v06 and hardware changes.

[detecto]

I use the v05 hex. As sonn as my battery pack arrives, i will post you distance with 1 € coin (using the "default" coil from the turkish forum). As i only have "dirty" power supply at he moment, my results are not as good as yours. Would be interesting to know, if there is much improvement with v06 and hardware changes.

Probably YES, we will see yet. I ordered MCU with full code for DP-3 from Turkey its will be nice project too (better than PIM-2 for shure)
I am planing to change BYV28-200 (FRD 250-270pF cross ower capacitance) with murs320 (FRD 110-120pF cross ower capacitance) BTW murs320 is used in GPX3500 circut.
And we will see improvment.
I am bicoming more and more interested in PI detectors (they left a lot of place to experimenting, and they are the future for shure)
Regards
Detecto

[detecto]

Regards for elbombaci.! Werry well done project!

[golden_greek]

I have v0.5 software in my PIM-2, discrimination works ok, and results are even bether than i toth. With 30cm coil 24 windings of 0.4mm giwing good results, dumper is 680ohm 1W.
Gold ring 2g abouth 17cm
1e coin 32-33cm
1l paint box over 1m
pertinex 12*12cm over 1.2m
Computer case over 1.7m
I am planing to make one round coil 50cm, and one square coil 1x1m.
I tested it indore, and i have a lot of EMI, so it couses a little instability outdore will be better. What version of software do you have?
Generaly i am satisfied with PIM-2.

DETECTO have do changes from prototype project? because and me dont have this results.
i have made a coil 30cm with 3 rounds UTP=24 windings
what settings use?
your coil how ohms is?

[detecto]

DETECTO have do changes from prototype project? because and me dont have this results.
i have made a coil 30cm with 3 rounds UTP=24 windings
what settings use?
your coil how ohms is?

I forgot exactly resistance of coil, if i remember it was abouth 3-3.5ohm
I didn't change anything except fet.
Settings:
Power 10
Ground 5
Delay 0
Trashold 0-3
I used 1% tolerancy resistors. it's crucial to use 1% tolerancy for R51, R52, R53, R54. R55
Also instead IRF740 i used IRF840, I actually tried both, maby 5% better results with IRF840.
IRF840 is little stronger.

[ahmad atarwnah]

What kind of screen lcd to you??

What kind of screen lcd to you??

[ahmad atarwnah]

Hello

Hello how are you I want to inquire about the type of wire used and the LCD screen type ..... Please help me to you

[detecto]

Hello how are you I want to inquire about the type of wire used and the LCD screen type ..... Please help me to you

You can use any standard 2x16 characters LCD, just look at the pin configuration on lcd.
I used this 1602-04 so the pins maching to PIM-2 (except backlight).

[Uykusuz]

Hi to all

I have recorted a performance video of PIM-2 V06.

http://www.youtube.com/watch?v=sZPQ3Sdt0vQ

[detecto]

Hi to all

I have recorted a performance video of PIM-2 V06.

http://www.youtube.com/watch?v=sZPQ3Sdt0vQ

Good work!
Regards
Detecto

[satdaveuk]

Take my hat off to you, theres little doubt in my mind you have taken The PI format to a new level, whats the betting you have manufactures keeping a very close eye on this project.
Its a good thing for all conserned here that you have made it public because it keeps the wolves at bay.
I for one will be making this detector soon as you have it done and dusted with final lay files.
Have you desided wether in the fucture to make the hex files public for us or are you keeping it closed shop so to speak to get some exspenses back.
If the latter any idea on cost for fucture supply of fully flashed Atmega8.

Anyway a big thankyou for sharing your expert knowledge

Regards

[satdaveuk]

Hi elbombaci
can you change your md mosfet to bup314 ?
it used in miner 4 .
miner 4 is not a good md its hex design to not work deliberately
but bup 314 is a good component and in my mind it must be a good project for you

change your md coil driver and see it change very strong tx power

best regards

freedan3d

[email protected]

Hi
I recently built the Minipulse 3 with added refinements and the overall performance is as spec from Pulsdetektor workshop which is quite good.
Could i also use bup but 314 fet as replacment to try and also would the coil specified here work with it.
Just looking for that extra mile
Thanks in advance
Regards

[Jose]

I have v0.5 software in my PIM-2, discrimination works ok, and results are even bether than i toth. With 30cm coil 24 windings of 0.4mm giwing good results, dumper is 680ohm 1W.
Gold ring 2g abouth 17cm
1e coin 32-33cm
1l paint box over 1m
pertinex 12*12cm over 1.2m
Computer case over 1.7m
I am planing to make one round coil 50cm, and one square coil 1x1m.
I tested it indore, and i have a lot of EMI, so it couses a little instability outdore will be better. What version of software do you have?
Generaly i am satisfied with PIM-2.

Hello Detecto
Can you please tell me what is the difference between software V0, 5 that you use, and the full version.
Where are the archives of PIM-02.
Any other information that is useful, because I am interested in the construction of this MD.
Thank you, a cordial greeting.
Jose

[turboaleks]

Now my PIM2-V05 recognizes a 1 Euro coin at 30cm with default settings. First field tests showing very good results. Every stronger signal was a hit. To get it working like this, I used CAT5 cable with 4 turns 1m each, so it then had a resistence of 4 Ohms (3 turns was no good). Everything else on PCB is like in the schematic. Just to mention all 0.25 Watt resistors have a tolerance of 1%.