PinPointer- Has anyone seen or built this?

[chemelec]

Hi chemelec - do you have specs on the coil in your schematic? Inductance, ferrite used, wire diameter, turns?
Thanks
Beav

1/4 X 1 1/2 Inch Ferrite Rod.
I Wound a 2 Layer Coil on it Using 30 AWG wire, with a measured Inductance of 1.2 mH.
(Not Sure of exact number of Turns, But Close Wound covering 1 Inch of the Rod.)

(Going to Cuba on Jan 17 for a Holiday, so may not reply more.)

[Beav]

Hi chemelec - do you have specs on the coil in your schematic? Inductance, ferrite used, wire diameter, turns?
Thanks
Beav

[chemelec]

I use the 1u5 Because I got a Deal on ordering a 1000 lot of them.
You can use 1u tantalum.
I like Tantalums, but even a 0.1 Polyester or Disc Cap will work.

I Buy Most of my Parts in 100, !000, Some even in 10,000 Lots.

However, Soon to Throw them All in the Garbage.

[MartyJ1963]

@Chemelec,,,,Thanks for the pcb image,,you're a star. I'll trace over it in Sprint and give it a try,,,I'll have to order some tantalums though cos' I don't think I have any 1u5,,,,Sorry to ask, but do you have an image of the silk screen? Much appreciated. Regards. Marty

[chemelec]

Marty, Hope This Works

[chemelec]

I Tried to Upload this Layout, But it says it is Too Big of a File.
Even tried Re-Sizing it Much Smaller.
It was Created in Sprint 6.0.

[MartyJ1963]

Hiya Chemelec....Would you have a copy of the pcb for the Pin pointer 4-E please. Thanks. Marty

[nonkapo]

Thanks Gary.

[chemelec]

No Longer Updating my Website.
And Possibly Shut it Down in the near future.

[nonkapo]

My Pinpointer:

http://chemelec.com/Projects/Metal-Pin-4/J-Fet_Pin-Pointer_2.avi

Using a Bigger Diameter Ferrite Rod will Increase Detection Distance, But than Pin Pointing Isn't as Precise.

Thanks for the video Gary,but i cant see the schematics on your site(nothing with jfets at least). Is it new project?

@Nonkapo,,,,Thanks, but the link is not working also. I have already made the Malysh FM2. It worked great at first but then only the LED's worked when there was detection,,no sound,,,don't know why? I tried several different chips,,both pic12f675 and the pic12f629,,it would give sound and LED's at first then only LED'S. I'm still trying to figure out why. Thanks. Marty

It works for me in the middle east. Try another browser.

[chemelec]

My Pinpointer:

http://chemelec.com/Projects/Metal-Pin-4/J-Fet_Pin-Pointer_2.avi

Using a Bigger Diameter Ferrite Rod will Increase Detection Distance, But than Pin Pointing Isn't as Precise.

[waltr]

@Dom44,,,,Thanks for letting me know. Would you know of any working Pinpointer projects that I could try? Really would appreciate it,,,Thanks, Marty

I built a pin pointer using Teemos' circuit.
http://www.geotech1.com/forums/showt...tector-project
Pin pointer details and pictures in this post:
http://www.geotech1.com/forums/showt...483#post241483

[MartyJ1963]

@Nonkapo,,,,Thanks, but the link is not working also. I have already made the Malysh FM2. It worked great at first but then only the LED's worked when there was detection,,no sound,,,don't know why? I tried several different chips,,both pic12f675 and the pic12f629,,it would give sound and LED's at first then only LED'S. I'm still trying to figure out why. Thanks. Marty

[nonkapo]

Yes it works decent.

You can buy Malysh as (all ready soldered, inclusive 5cm coil,
what you need more is housing) kit from this Bulgarian guy:

http://newhobby.eu/pinpointer-with-discrimination.html

Link is not working. Try this one. https://newhobby.eu/en/metal-detectors/33-pinpointer-with-discrimination.html
Just ordered but will be delivered to me only march, so then will share the experience.

[MartyJ1963]

@Dom44,,,,Thanks for letting me know. Would you know of any working Pinpointer projects that I could try? Really would appreciate it,,,Thanks, Marty