Special Pinpointer!

[Funfinder]

Below you can see my new selfbuilt pinpointer inclusive in-air-test-results. Those are around 3times better than the Whites Bullseye 2 and the price was only 30 Euros!


Here you can find the original:
http://www.conrad.de/ce/de/product/6...ETALL-DETECTOR

And now my new one - the size is just 20x5cm and it runs with one 9V cell.


In air tests:

MD5 (Conrad Metaldetector MD5 modified)
W (Whites Bullseye II Pinpointer)
(/) Diameter

Maximum detection distance: MD5: 20cm | W: 7cm
Pot - 20cm (/): MD5: 10cm | W: 4cm
1 Euro - 24mm (/): MD5: 5cm | W: 1,5cm
Screw - 9cm long, 5mm thick: MD5: 3,5cm | W: 5mm
small nail - 4cm long, 1,5mm thick: MD5: 3cm | W: 5mm
little rusty metal piece - 8mm (/): MD5: 1cm | W: 5mm


Good Luck and special greetings to WM6 who for shure can't wait to answer - as always! Isn't it fantastic, my new "Micro-Nintendo"?

[WM6]

Good Luck and special greetings to WM6 who for shure can't wait to answer - as always! Isn't it fantastic, my new "Micro-Nintendo"?

Congratulation, dear Funfinder, on succesful modding. This is ein real Krempel not like nintendo.

I modded such one in magnetometer by rewinding coil on ferrite - can post picture if you wish.

[Funfinder]

WM6:
How you dare calling my fanstastic selfbuilt power-pinpointer "Krempel" which means: "old worthless stuff"?

Shure the circuit isn't "hitec" but the detection range is 3 times better than the 3 times more expensive Whites pinpointer so in total I got a 9 times success!


Thanx for your offer showing me/us your magnetometer mod - I'm interrested in seeing it. How does it work and how sensitive it is?

[WM6]

Hi Funfinder,

those Krempel was in supportive mean only. I highly appreciate your constructors efforts.

Here picture of my pin-pointer made out of security detector and can be switchable to magnetometer:

It can sense moving screwdriver at 18cm distance.

[Geo]

Hi Funfinder.
Congratulation for your pinpoint.
Can you tell me why you replaced the round coil of the prototype with the square one???
Did you changed the frequency???

Regards

[Funfinder]

@ WM6

> those Krempel was in supportive mean only. I highly appreciate your constructors efforts.

Very well then and thanx also for your constructive input.
Your Magnetometer Mod looks really great and professional! I guess it's not that simple as it looks.
What size has the screwdriver, does it also detect non-ferrous metal and can u use it as compass?


In the meanwhile I'm no longer shure the used circuit of the Conrad MD5 ist "usual pinpointer stuff". Because:

- It only reacts when metal is moving.
- uses high sensitivity "Memory Circuit"
- switches automatically into Standby-Modus
- uses 2 ICs

I tried to modified the electronic into non-motion pinpointing by connecting 2 IC pins but I only could eliminate the beeping sequence - metal still needs to be moved. Doesn't matter alot, it works!


@ Geo
Thanx for your interrest!

I've been very lucky with the new coil - there was nothing to change at all! I even didn't desoldered the coil wires, just moved the coil through an ex-AC-DC power supply housing, made 2 big windings out of the original coil and it fitted perfectly!

The new mini-coil is more sensitive to smaller stuff (til 8mm!) - this was the main intention - and it's better for searching into small holes.

There is one internal variable resistor for adjustment but I even hadn't to use it after modification. But I added a 2nd one because the piezo-siren was far too loud. Btw. a few hours ago I "modded" the tip of the Whites pinpointer - the old one was almost broken and the new tip will penetrate much better the soil.

And I heard there exists pinpointers that have already much better depth compared to the cheapo ferrite-coil ones - like the Garrett Pro or even better - vibratiing P.I. Pinpointers for under water.

But I like my new - "Mini-Metaldetector" - it will be the star of the next party!

[Funfinder]

Now I found that here (in Germany):
http://detectorcenter.eu/
http://detectorcenter.eu/Detektoren1...unter_md05.htm
this Detector MD05 costs inclusive handle 88 Euro - 3 times
more than at the Conrad. So always be careful where you buy!

coin: 8cm
cola-can: 32cm
battery-life: 20h

[Ganesh]

MD from Conrad

The pinpointer seems to be quite sensitive but a motion design as a pinpointer seems to me not the best concept for pinpointing needs. I assume you need to move it just slowly in order to get a response right?

Ganesh

[Funfinder]

You have to move the small coil, but only around 5 mm.

If you have enough money:
Better get the Garrett Pro-Pointer, it's much more powerful.

[Ganesh]

Probe modding

If I had the money I would buy either the garrett or an uniprobe or pistol probe. But I go detecting only occasionally. So far I found my stuff even with my Lidl stud/metal detector. It does 3 cm on a 1€ coin. It is just not so handy to probe around in a smaller hole.
The MD5 is available vor 20€ now on ebay. So I am temted to buy it and mod it.
I thought also buy a security wand and use it as a pinpointer. Right now my preferred model is sold out in ebay and I had to order it directly from HK.

Ganesh