Arduino Nano PI Main Discussion

[Jeg]

Hi all
Qiaozhi what is your opinion about big frame coils in relation with the ANPI? Does it behave good in slow movement?

Thanks

[Jeg]

Thank you guys, i wish you the best!

[MartinB]

Did you check the Book depository in the Link?

If anyone is having problems ordering a copy of the book from Amazon in their particular country, the Book Depository can supply copies with free delivery worldwide.
https://www.bookdepository.com/Ardui.../9798719427911

Hi waltr,
Good link. Thanks for sharing.

[Qiaozhi]

Hallo again
George i sent the pcb gerber files to a local printing shop thinking that it is a one side board. The owner of the shop told me that it is a double side board. Is that correct? Unfortunately Amazon can not deliver the book here where i live and i will need more time until i get it perhaps over a month. So, may i purchuase the board? Is that the correct version? I downloaded files from here:

https://www.geotech1.com/forums/showthread.php?26505-Arduino-Nano-Pulse-Induction-Metal-Detector-Project-Published-March-2021

Thank you
Jeg

Yes, those are the correct Gerber files. The design is double-sided.
I recommend sending the Gerber files to https://jlcpcb.com/

As waltr said, try The Book Depository to order the book.

[waltr]

Did you check the Book depository in the Link?

If anyone is having problems ordering a copy of the book from Amazon in their particular country, the Book Depository can supply copies with free delivery worldwide.
https://www.bookdepository.com/Ardui.../9798719427911

[Jeg]

double side pcb board

Hallo again
George i sent the pcb gerber files to a local printing shop thinking that it is a one side board. The owner of the shop told me that it is a double side board. Is that correct? Unfortunately Amazon can not deliver the book here where i live and i will need more time until i get it perhaps over a month. So, may i purchuase the board? Is that the correct version? I downloaded files from here:

https://www.geotech1.com/forums/showthread.php?26505-Arduino-Nano-Pulse-Induction-Metal-Detector-Project-Published-March-2021

Thank you
Jeg

[Jeg]

I found out that it is not of the proper diameter for to reach the right resistance and inductance. I used the coil32 software online and suggests a awg22 cable for my needs. So the research continues.

[Jeg]

ethernet cat7

Hi all
I would like to constract a frame coil of 1,20m X 1,20m, for my ANPI. Do you think that an ethernet cable CAT7 would do the job? Any other sugested type of cable for this job?

[Qiaozhi]

wow Qiaozhi you are the writer of this book?!

Correct.

I hope i can trace the book with the pcb boards by living here in Greece. Can't wait to mess with it

I wish you success with the project.

[Jeg]

wow Qiaozhi you are the writer of this book?! That is a great surprise! You have made a great work here, as in many projects over those years! No words for expressing my gratitude. I hope i can trace the book with the pcb boards by living here in Greece. Can't wait to mess with it

[Qiaozhi]

Hi Qiaozhi
Thanks a lot for releasing this great project.

Why do you think that EFE pulse shouldn't move when we adjust the main sample delay pot? We have to introduce the EFE pulse at a moment in which we are sure it is far from the main sample pulse. So my guess is that it has to move so to keep the time difference between main sample and EFE steady as we adjust the delay pot.

Excellent job, thank you guys, and thank you George Overton for opening this project.

The important thing is that the sample pulse and the EFE pulse should be the same width, so the detector will still work ok even without the code change. With the current sketch, the EFE delay is being increased as the sample delay increases, whereas it is normal to keep the delay at a fixed position, and only adjust the sample widths.

By the way, Qiaozhi is a transliteration of George in Mandarin.

[Jeg]

Hi Qiaozhi
Thanks a lot for releasing this great project.

Why do you think that EFE pulse shouldn't move when we adjust the main sample delay pot? We have to introduce the EFE pulse at a moment in which we are sure it is far from the main sample pulse. So my guess is that it has to move so to keep the time difference between main sample and EFE steady as we adjust the delay pot.

Excellent job, thank you guys, and thank you George Overton for opening this project.

[Qiaozhi]

Alfonso (ahermida) has noticed that the EFE sample delay changes when the Delay pot is adjusted.

Although the EFE delay setting is not that critical, it is not supposed to change when you adjust the delay.
It's an easy fix though. Simply remove the following line from the calcTimerValues() routine:
temp4 -= temp3 + temp2;

I've added a second item to the errata list here -> Arduino Nano Pulse Induction Metal Detector Project - Published March 2021

[Qiaozhi]

I received some different 7660's today and now getting -4.76V at TP3 . So thanks again for your help diagnosing this issue.

For reference this is the one that works https://www.bitsbox.co.uk/data/sfic/ICL7660S.pdf

Avoid this one:
https://docs.rs-online.com/8c75/0900766b814f3c41.pdf

[MATT]

It's must be a problem with the 7660 because your scope image (with R1 in-circuit) is the same as I see here.
Referring to the datasheet for the 7660, on page 8 it shows a series resistor of 1k, but I've never had a problem using 10K. It might be worth a try to reduce the value of R1 and see what happens.
Certainly no-one else has ever reported seeing this problem.

I received some different 7660's today and now getting -4.76V at TP3 . So thanks again for your help diagnosing this issue.

For reference this is the one that works https://www.bitsbox.co.uk/data/sfic/ICL7660S.pdf

Avoid this one:

https://docs.rs-online.com/8c75/0900766b814f3c41.pdf