Whites Surf PI schematic

[Aiko]

Thanks for the idea Cordius, but not difference. Anyway – Surf PI works very well. If there was a discrimination, it was going to be a dream.

[cordius]

try to invert the two wire of the coil, in your photo the red wire with the ground wire of the coil.

[Aiko]

Thanks Qiaozhi! Even I touch the minus on the batteries it follows a beeping. Or, If I turn some of the potentiometers even through plastic knob. I think, if I have a metallic corpus (in my case it is plastic) even then if I touch the corpus will follows a beeping.

To all – please excuse my English!

Regards!

[Qiaozhi]

Did you make this PI? Even I touch the ground (minus on the batteries) it follows a beeping sound.

Regards!

I have not made this PI, but not grounding the metallic case is a common problem. I assume you're not actually touching any of the circuit components to cause the beeping?
Perhaps you simply do not have enough decoupling caps fitted.

[Aiko]

Try connecting the metallic case to the 0V rail.

Did you make this PI? Even I touch the ground (minus on the batteries) it follows a beeping sound.

Regards!

[Qiaozhi]

No interference beeping in your device? Strange Maybe this is not exactly interference, but when I touch any metallic part of my device it beeps at once.

Try connecting the metallic case to the 0V rail.

[Aiko]

No interference beeping in your device? Strange Maybe this is not exactly interference, but when I touch any metallic part of my device it beeps at once.

[Geo]

Thanks Geo

My hot glue pistol is my favorite instrument

Do you have an interference problems with your device?

Regards!

Hi Aliko
No problem

[Aiko]

Thanks Geo

My hot glue pistol is my favorite instrument

Do you have an interference problems with your device?

Regards!

[Geo]

Very good Aiko. Small, light and with good performance detector.
I Like it.
There is another reason. Your construct likes with mines.....
Much...much Hot Glue
Regards

[Aiko]

This is my handmade. One euro cent detect clear at 15 cm. 1 euro maybe 30 cm.

[Aiko]

Hi guys!

I also build this excellent PI. Many thanks to all and especially to Cordius for the PCB.

The detections distance is very good, but my device beeping when I touch any metallic part. I think this is some kind of electromagnetic interference. Is this normal? As I understood the discrimination pot. is for this, but if I decrease the interference with this pot, the detections depth also comes down. Is there anybody with the same problem? I will post some pictures later.

Regards!

[humhum]

Hi! HUMHUM

Maybe a single VU indication between ferrous and non-ferrous.



Best Regards
DIRCEU

Yes, Maybe..

[DIRCEU]

Thanks for all answer. Do you do Baracuda discrimination?
I waiting you for result with Baracuda.

Best regard.

Hi! HUMHUM

Maybe a single VU indication between ferrous and non-ferrous.



Best Regards
DIRCEU

[humhum]

Thanks for all answer. Do you do Baracuda discrimination?
I waiting you for result with Baracuda.

Best regard.