Universal PI Micro

[amtech2005]

Universal PI Micro

I DID CHECK OUT THE http://www.goldprospecting.invisionplus.net AND ITS A GREAT NEW SITE WITH ALL ITS NEW ELECTRONIC DESIGN TOPICS OR THREADS. BUT SOMETHING IS MISSING AND ITS BIG !!!! SO I WILL START A NEW THREAD HERE ON GEOTECH THAT WILL HELP A LOT OF PEOPLE INCLUDING MYSELF . AND IT WILL BE A TOPIC THAT IS NOT COPIED FROM ANY OTHER FORUM. IT WAS SOMETHING I WAS TRYING TO START 3 OR 4 YEARS AGO AND NEVER GOT AROUND TO IT. YOU WILL SEE IT TONIGHT OR TOMORROW. IT WILL BE NAMED SOMETHING TO THE EFFECT OF "I.C." [INTEGRATED CIRCUIT] APPLICATIONS FOR V.L.F AND P.I. METAL DETECTOR'S. I WILL EXPLAIN WHAT I AM TRYING TO DO ON THE FIRST POST...............EUGENE

Thanks DOUG

Hi there,
This thread has gone very quiet. Has there been any progress or has it gone underground?

Interested bystander.

Bugwhiskers now mostly only posts on a new forum:

http://goldprospecting.invisionplus.net/

Well worth a look at this forum,a lot of good electronic and other stuff both for members and guests.

Hi there,
This thread has gone very quiet. Has there been any progress or has it gone underground?

Interested bystander.

[bugwhiskers]

Correction

Correction to the above post, I meant to say the MAX405xA family. The "A" suffix denoting the premium parts with better specs. They are not cheap nor readily available but worth the effort as the voltage at the threshold of detection is miniscule and can easily bleed away via chip/cap leakage.

regards
bugwhiskers

[bugwhiskers]

Maximising sensitivity

To maximise sensitivity it is recommended that all the sample and hold capacitors be polypropylene types and the muxes be the MAX405x family due to their better leakage figures, 10 times better in fact than the standard 405X or 74HC405X series.


regards
bugwhiskers

[Atul Asthana]

Rajesh ji,
Check your private message.

[rajesh]

t/r

hi atul im form indor mp mai bana raha hu gary chemelec ka t/r locator 10 peas our ke pahle maine gary ka pulses 1 banaya tha this good working 1 meter for big metal mera mobile no hai 9893588660....

[Atul Asthana]

AVR design? Is any one working on it?

Is any one working on a ATMega design for this PI detector?

[gef12]

What I think bugwiskers is trying to say fellows is that trying to find gram size gold nuggets in heavily mineralized soils / grounds is the real challenge and he is doing well. Who needs to find cannon balls 5 feet in the ground ..you have to put in the hard yards and then dig for it ... give me the gold any day.
cheers
gef

[bugwhiskers]

Making a PI that will see target at a distance is one of the easier tasks. All that is required is a large coil, lots of current and lots of amplification.
Making a detector that can eliminate the ground signal that in some instances can be thousands of times stronger than the target and being able to discriminate is the real challenge.

regards
bugwhiskers

[Atul Asthana]

Every one here seems to be a nut case mumbling to themselves,

Every one here seems to be a nut case mumbling to themselves, just like a cpu talking to ram without any proper output, with their clone schematics, try to get to the front end circuitry you fellows. Just changing the display with graphical one and cloning the hardware wil not help you fellows, since year 2000 i am seeing this site, and no improvement, many 2nd grade manufacturers in India has a PI detector which can detect a cannon ball 5 feet away in air, you fellows dont even come to this limit, and you cant come to the speck of 20 feet detectors....

Excellent information from Unregistered. I am sure s/he will like to enlighten us with a little glimpse of the technology used by 2nd grade manufacturers instead of complaining about no improvement.

Are you there???

lazy scope owners

People having test instruments etc should experiment with low noise designs, and using optos for signal transmission etc etc.... the noise feedbacks from ground etc etc these fellows are lazy and very lazy.

Every one here seems to be a nut case mumbling to themselves, just like a cpu talking to ram without any proper output, with their clone schematics, try to get to the front end circuitry you fellows. Just changing the display with graphical one and cloning the hardware wil not help you fellows, since year 2000 i am seeing this site, and no improvement, many 2nd grade manufacturers in India has a PI detector which can detect a cannon ball 5 feet away in air, you fellows dont even come to this limit, and you cant come to the speck of 20 feet detectors....

Advanced Circuitry

Every one here seems to be a nut case mumbling to themselves, just like a cpu talking to ram without any proper output, with their clone schematics, try to get to the front end circuitry you fellows. Just changing the display with graphical one and cloning the hardware wil not help you fellows, since year 2000 i am seeing this site, and no improvement, many 2nd grade manufacturers in India has a PI detector which can detect a cannon ball 5 feet away in air, you fellows dont even come to this limit, and you cant come to the speck of 20 feet detectors....

[Atul Asthana]

Discrimination : Decay diagrams and settings

Thanks, that helps.
I guess, carrying out this comparison in software should be still better. I hope the ATMega8 design will be available in the near future.