Arduino Nano PI Main Discussion

[MartinB]

Hello everyone. I bought a book, bought a couple of printed circuit boards from a silverdog, an arduino nano. They promise to send it within two weeks. The rest of the details are all there. I hope to have time to do it before the opening of the season. I will use it under water.

Quite a challenge to make the control box waterproof.

[Myntmaster]

Hello everyone. I bought a book, bought a couple of printed circuit boards from a silverdog, an arduino nano. They promise to send it within two weeks. The rest of the details are all there. I hope to have time to do it before the opening of the season. I will use it under water.

[David_1]

deleted.. my own post

[Qiaozhi]

and the Bom ? U4 ?

The Component Parts List is in Appendix A of the book.

[David_1]

and the Bom ? U4 ?

[Qiaozhi]

where is the schematic for the Nano-Pi ?
Found this ?
https://www.geotech1.com/forums/show...nano+schematic

Yes, it's there: Arduino_PI.pdf

[David_1]

where is the schematic for the Nano-Pi ?
Found this ?

https://www.geotech1.com/forums/showthread.php?26505-Arduino-Nano-Pulse-Induction-Metal-Detector-Project-Published-March-2021&highlight=nano+schematic

[David_1]

So I read up to page 9.. on my phone.. does any hear understand rfid. And the chips they put in dogs and cats ? About 20 years ago I was involved in making the readers.. its very similar to a metal detector.. in as much as on coil powers the pet chip via another coil.. but in turn the chip in the animal nulls or doesn't null the transmitting coil to transmit the rfid number back to the reader... !

[bklein]

My receptable wiring seems different from yours. Key is at the bottom, pins 4 and 5 to the left of it (your receptacle is oriented the same)
Nothing on the right side. Yours looks different. Several GPX coils work fine on mine but I haven't taken it to a local park yet.
Lots of steel around my workbench area but if I distance the coil a couple feet from it it works fine.

[Carl-NC]

My best guess right now is you have a bad coil, maybe the shield has broken loose. Have you tried it on a GPX or TDI?

[dingbatca]

Just one minor clarification. I have not modified this coil in any way. The cut line is stock from the manufacture. I will try to get my meter in there to see if the cut line is hooked up, but I doubt it.

[dingbatca]

Does anyone else have a Minelab GPX, GP, SD Mono coil they can test the ANPI against?

My end goal was to have a really good coil. I want to use said coil as my "gold" standard to test all my home brew coils against. The 8" was nice as I could build home brew coils of the same size and shape to test.

[bklein]

Along with what I just posted... I started to think about this Detech coil. As the TX is just cut free, would it be better to terminate it with a damping resistor or short? Would it ring and then couple to the RX coil?
I know guys are running GPX coils on the TDI but maybe the TDI shorts the TX coil out? I've never read anything about this subject, so.....

[bklein]

Here is the whole connector wiring diagram. I started to wonder about the TX coil wiring (that you cut). Make sure you cut the right one...

[Qiaozhi]

I did see post #495. Do you still think that will make a difference knowing pins 1, 2, and 3 are just shorted in the coil side plug?

In your simple test coil there doesn't appear to be a shield. If that works ok in the field then there might be something fishy going on with the GPX coil as regards shielding. If it's not that, then I'm not sure what it could be.

Having re-read your post I see what you mean. The pins are actually shorted together in the coil plug, not the socket.
This is a mystery.