PICKINI V4 - an easy to build, self adjusting PI detector

[BC547]

What do you mean with "sensitivity decreases" ?
Was the sensitivity OK and has it dropped ?
Has the detector worked OK ? or is this the first time you test it ?
Can you adjust the sensitivity potmeter between 0-5V ?

Can you show a picture of your actual board ( front and back ) ? The picture you show is the one from my website.

[Reedick]

Iam testing all component. Irf740. No error. Bs170. No error bc549. No error. What is the problem

[Reedick]

Hi to all please may machine pickini have a problème. (Sensitivity decreases too much). Ennyone hère help me

[Reedick]

IAM using this pcb but sensitivity decreases why. https://www11.0zz0.com/2023/10/01/13/864822868.jpg

[Reedick]

Hi to all please mat machine pickini have a problème. (Sensitivity decreases too much). Ennyone hère help me

[MartyJ1963]

Nothing wrong with the Pickini4, great little detector! It found me a gold ring with diamonds at just over 12 inches! Hope you're fit and well Bernard! Regards, Marty.

[sergio lhullier]

send the kit to Brazil

[sbalio1]

try to make tl12000 its stable in ground and deep search coil. i kow many people have it. i make this pikini v4 i tested it in ground it works . nice projet.

[jeep6789]

Why don't you just post the circuits and procedures here? Why make it so long, you've never seen a circuit diagram, you've never seen a 3, you've never seen a 4, why not make a Felezjoopi, which is hundreds of times better than this toy

[BC547]

PICKINI website moved

The web site for the PICKINI project has moved to

http://www.willaert.world/MD/pickini_en/V4/intro.html

[sbalio1]

yes its ok . this not working https://www.geotech1.com/cgi-bin/pag...fmx1/index.dat

[BC547]

hi i sve my problem it works well..ifound error pin 8 and 9 . unconsolidated

Pin 8 and 9 of the PIC controller should be connected to each other.

[BC547]

If you are looking for bigger objects at larger depths, consider building a simple fluxgate magnetometer
like this one:

https://www.geotech1.com/cgi-bin/pag...fmx1/index.dat

or a kit from:

https://www.fgsensors.com/

[sbalio1]

hi i sve my problem it works well..ifound error pin 8 and 9 . unconsolidated

[BC547]

Here is an example of a larger coil mounted on a cart, to detect WW1 UXO at greater depth with Pickini.

https://www.geotech1.com/forums/showthread.php?23400-PICKINI-V4-an-easy-to-build-self-adjusting-PI-detector&p=258628#post258628

To answer your other questions, you will have to build all these detectors and find out what works best for your purposes.