Universal PI Micro

[Götz von Berlichingen]

Carl has kept this forum going for ten years.
We all should show our gratitude by posting interesting subjects.
So I propose we make this an "Open source" project.
At least the "demo" mode.
Tinkerer

OK, but i dont think this Project is related to Bugwhisker's Universal PI Micro, or is it ?
I spent a long time reading this Thread and it seems like the Universal PI Micro is a finished (and dead) Project.
Bugwhisker's latest Detector is a "secret" Project.

OK, lets make it open Source and please start a new Thread to keep this one free of offtopic Stuff.

[bugwhiskers]

Hi Tinkerer,

If you want to smooth out noise from the ADC readings you can try the following method.

Create a string of locations in RAM, maybe 64
Have a routine that shifts them all along one position each cycle, loses the oldest and puts the latest reading in the first position.

Each cycle add them all up then divide by 64 (shift right 6 times) voila, a software integrator.
If you have 10000 cycles per second then the time lag wrought by the averaging will be minimal.

No signal strength will be lost, just noise.

Prevention is better than cure. Make sure your PCB has an effective ground plane and all the components associated with the front end are grounded as near as possible to the same point. The + of the tank cap is a good spot.

regards
bugwhiskers

[Tinkerer]

New Thread

Hi Tinkerer,

If you want to smooth out noise from the ADC readings you can try the following method.

Create a string of locations in RAM, maybe 64
Have a routine that shifts them all along one position each cycle, loses the oldest and puts the latest reading in the first position.

Each cycle add them all up then divide by 64 (shift right 6 times) voila, a software integrator.
If you have 10000 cycles per second then the time lag wrought by the averaging will be minimal.

No signal strength will be lost, just noise.

Prevention is better than cure. Make sure your PCB has an effective ground plane and all the components associated with the front end are grounded as near as possible to the same point. The + of the tank cap is a good spot.

regards
bugwhiskers

Thanks for your help Bugwhiskers.

This is certainly very good advice.

I am going to start a new thread as Gotz suggests. We would very much welcome your input also in the new thread.

Tinkerer

[Tinkerer]

New thread

OK, but i dont think this Project is related to Bugwhisker's Universal PI Micro, or is it ?
I spent a long time reading this Thread and it seems like the Universal PI Micro is a finished (and dead) Project.
Bugwhisker's latest Detector is a "secret" Project.

OK, lets make it open Source and please start a new Thread to keep this one free of offtopic Stuff.

I am going to start a new thread "MCU PI Discriminator"

Tinkerer

[bugwhiskers]

Hi Tinkerer,

Have a look at the following link.

http://goldprospecting.invisionplus....t=0&#entry3443

regards
bugwhiskers

[bugwhiskers]

Schematic

Attached is a brief schematic to show the concept.

regards
bugwhiskers

[Tinkerer]

Clever way to resolve the RX signal

Attached is a brief schematic to show the concept.

regards
bugwhiskers

Thanks for posting the schematic and the explanation. The use of the constant current source and measuring the time is certainly very clever and very innovative.
Your results are very impressive.

Tinkerer

[bugwhiskers]

Hi Tinkerer,

I have added some more info on discrimination at the following link.

http://goldprospecting.invisionplus....t=0&#entry3475

regards
bugwhiskers

[Uykusuz]

Hi to all

This links is my projects viedos.

http://video.google.com/videoplay?do...28985205264269

http://video.google.com/videoplay?do...07037523843742

@bugwhiskers

Thank you for explanation.

[bugwhiskers]

Hi Elbombaci,

Well done job on the Screen menu !

Unfortunately I don't understand Russian. Could you post and tell us what we are looking at.

I have made some breakthroughs in minimising EMI and also extraordinary resolution of signal that could benefit your project. You can see some details at the following links.

http://goldprospecting.invisionplus....showtopic=1639

http://goldprospecting.invisionplus....g&showforum=71



regards
bugwhiskers

[Uykusuz]

Thank you for links,

I'm from Turkey.


"GUC AYARI" = Duty Cycle
"ORNEKLEME GECIKMESI" = Sample Delay
"ORNEKLEME ARALIGI" two sample between delay
"ORTALAMA" = Demand
"T:" Total Bars
"X:" First Bar - End Bar

[aft_72005]

Hi to all

This links is my projects viedos.

http://video.google.com/videoplay?do...28985205264269

http://video.google.com/videoplay?do...07037523843742

@bugwhiskers

Thank you for explanation.

Hi elbombaci
Interesting work, but seem as without vco and sound.
Best regards.

[Unregistered]

Hi elbombaci
Interesting work, but seem as without vco and sound.
Best regards.

A good new micro pi project by BW is going at :
http://goldprospecting.invisionplus....g&showforum=71
worth a look.

[Unregistered]

I can't get on to that site. It seems to be down more often then up!

I get.....
ERROR: Cannot find database cluster_42
THIS ERROR WAS SUCCESSFULLY LOGGED ??????

[Unregistered]

I can't get on to that site. It seems to be down more often then up!

I get.....
ERROR: Cannot find database cluster_42
THIS ERROR WAS SUCCESSFULLY LOGGED ??????

working ok for me at present and i find ok most times
complete QED pi schematic i find uploaded from BW just now