All things SurfPI, a comprehensive summary of useful links.

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	All things SurfPI, a comprehensive summary of useful links. « on: August 15, 2015, 08:53:18 am »

Yes the Surf PI is a very good and simple design for beginners with the possibility to do modifications.

Please look at the following links to help you in your quest to build your own SurfPI detector.

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http://www.silverdog.co.uk/shop/imag...ematic1_2A.JPG

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http://www.geotech1.com/forums/showt...f-PI-schematic

or PI Pro / pin-pointer schematics

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http://www.geotech1.com/forums/showt...55-Surf-PI-Pro

As for Surf PI modifications please check out these links

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http://www.geotech1.com/forums/showt...n-modification

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http://www.geotech1.com/forums/showt...ut-for-Surf-PI

there are also some more modifications, these are on the

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www.thunting.com

website

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http://www.thunting.com/smf/modifications_do_it_yourself_repairs/making_a_surf_pi_12-t596detectors

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http://www.thunting.com/smf/pi_designs_deepseekers/underwater_pi_project-t2838.0.html

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http://www.thunting.com/smf/pi_designs_deepseekers/surf_pi_questions-t18386.0.html

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http://www.thunting.com/smf/pi_designs_deepseekers/surf_pi_speaker_modification-t56554.0.htmlhtml

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http://www.thunting.com/smf/pi_designs_deepseekers/surf_pi_coil_help-t28087.0.html

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http://www.thunting.com/smf/pi_designs_deepseekers/fast_basket_type_coil_for_pi_good_info-t28246.0.html

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http://www.thunting.com/smf/pi_designs_deepseekers/pulse_induction_tutorial-t3649.0.html

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http://www.thunting.com/smf/pi_designs_deepseekers/surf_pi_v12-t18771.0.html

Also here are links to some information you will find useful when building coils.

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http://www.geotech1.com/forums/showt...urf-PI-DD-coil

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http://www.geotech1.com/forums/showt...from-silverdog

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http://www.geotech1.com/forums/showt...oil-Resistance

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http://www.geotech1.com/forums/showt...?16322-PI-coil

This is a link to a very useful coil calculator for wen you build your coils

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http://www.geotech1.com/forums/showt...oil-Calculator

If you want to have a kit you can buy that you can assemble yourself please visit the following link (but you will need to make or buy your own coil)

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http://www.silverdog.co.uk/shop/inde...&product_id=76

As for getting better depth .. you need a bigger diameter coil, but you will loose sensitivity on smaller objects because of this.

using a ferrite core is possible with a small coil .. but the only thing you have to take into consideration is that the coil needs to be matched to the circuit. the Surf PI circuit calls for coil inductance of around 240uH to 300uH with a coil resistance of approx 1 ohm to 1.6 ohms (resistors in series may be needed to achieve the desired resistance) else you could damage the parts in the circuit.

other useful stuff

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http://www.thunting.com/smf/modifications_do_it_yourself_repairs/water_sifter_and_scoop_plans-t18492.0.htmlhtml

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http://www.deeptech-bg.com/Understanding_The_PI_Detector.htm

It's good to research! Do your homework!

If you find any further modifications, that work, please feel free to post them on this thread.

GL with your SurfPI build if you decide to proceed.

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GoldDigger1950

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	Re: All things SurfPI, a comprehensive summary of useful links. « Reply #1 on: August 15, 2015, 09:13:30 am »

Please note that the Geotech1 Links are all 404 error pages unless you are logged in to that forum. So, log in first, then go there.

Actually, you must be logged in to HostGator.

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« Last Edit: August 15, 2015, 09:15:21 am by GoldDigger1950 »	Logged

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	Re: All things SurfPI, a comprehensive summary of useful links. « Reply #2 on: August 15, 2015, 01:34:10 pm »

If your going to do all those changes, Just do the Hammer Head. It has most of those adjustments on the basic board.

Posted on: August 15, 2015, 01:28:44 pm

None of those links worked for me. Even if I was logged in to Geo tech.

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	Re: All things SurfPI, a comprehensive summary of useful links. « Reply #3 on: August 15, 2015, 01:36:14 pm »

Me either. For some reason all the Geotech links give a 404 page error.

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Lord Dracon Topic starter

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	Re: All things SurfPI, a comprehensive summary of useful links. « Reply #4 on: August 15, 2015, 03:40:54 pm »

had a play.. Angry

. it's because the links have been shortened by my tablet Huh?

.... and now the web addresses are not recognised... please can you delete this thread and I will start again .. if possible.. I will also put into as to you need a geotech ac to access the info..if not, I will repost on this thread.. thanks

Posted on: August 15, 2015, 02:04:58 pm

Whilst this thread is still active here is an updated repost (With all the links, hopefully working) Kiss

Yes the Surf PI is a very good and simple design for beginners with the possibility to do modifications.

Please note; You will not be able to access any of the geotech info unless you are logged into an account, which is easy to set up if you don't already have one.

Please look at the following links to help you in your quest to build your own SurfPI detector.

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http://www.silverdog.co.uk/shop/image/data/schematic1_2A.JPG

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http://www.geotech1.com/forums/showthread.php?13810-Whites-Surf-PI-schematic

or PI Pro / pin-pointer schematics

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http://www.geotech1.com/forums/showthread.php?18655-Surf-PI-Pro

As for Surf PI modifications please check out these links

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http://www.geotech1.com/forums/showthread.php?18613-Surf-PI-gain-modification

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http://www.geotech1.com/forums/showthread.php?16576-Led-output-for-Surf-PI

There are also some more modifications, here on the

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www.thunting.com

website

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http://www.thunting.com/smf/modifications_do_it_yourself_repairs/making_a_surf_pi_12-t596detectors

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http://www.thunting.com/smf/pi_designs_deepseekers/underwater_pi_project-t2838.0.html

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http://www.thunting.com/smf/pi_designs_deepseekers/surf_pi_questions-t18386.0.html

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http://www.thunting.com/smf/pi_designs_deepseekers/surf_pi_speaker_modification-t56554.0.htmlhtml

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http://www.thunting.com/smf/pi_designs_deepseekers/surf_pi_coil_help-t28087.0.html

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http://www.thunting.com/smf/pi_designs_deepseekers/fast_basket_type_coil_for_pi_good_info-t28246.0.html

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http://www.thunting.com/smf/pi_designs_deepseekers/pulse_induction_tutorial-t3649.0.html

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http://www.thunting.com/smf/pi_designs_deepseekers/surf_pi_v12-t18771.0.html

Also here are links to some information you will find useful when building coils.

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http://www.geotech1.com/forums/showthread.php?17772-Surf-PI-DD-coil

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http://www.geotech1.com/forums/showthread.php?19486-Best-coil-for-Surf-PI-1-2-from-silverdog

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http://www.geotech1.com/forums/showthread.php?19169-PI-Coil-Resistance

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http://www.geotech1.com/forums/showthread.php?16322-PI-coil

This is a link to a very useful coil calculator for wen you build your coils

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http://www.geotech1.com/forums/showthread.php?17909-Coil-Calculator

If you want to have a kit you can buy that you can assemble yourself please visit the following link (but you will need to make or buy your own coil)

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http://www.silverdog.co.uk/shop/index.php?route=product/product&path=36&product_id=76

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http://www.thunting.com/smf/modifications_do_it_yourself_repairs/water_sifter_and_scoop_plans-t18492.0.htmlhtml

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http://www.deeptech-bg.com/Understanding_The_PI_Detector.htm

Posted on: August 15, 2015, 03:12:26 pm

	Quote:	Posted by homefire
If your going to do all those changes, Just do the Hammer Head. It has most of those adjustments on the basic board.

Maybe someone only wants to do one or two modifications and see how each affects the circuit, more a learning tool. Why have everything done for you, what will you learn then? appart from its quicker to have a ready made circuit.. then if that's the case you might as well go and buy a ready made machine.

I feel the PI is a good entry level PI machine as it is basic enough that you can break down the schematic into a flow chart/process chart and see how each section works, if you are confident enough you could then go on and calculate the timings of the components based on the resistances, capacitance and conductance all built into the circuit.. I can decipher it and I only did electronics at A-level (college level) 22 years ago and not much since. but i suppose I was fairly bright as I managed to build a fairly complex car alarm with siren, door sensors, entry and exit timing etc. when I was 18. Tongue

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	Re: All things SurfPI, a comprehensive summary of useful links. « Reply #5 on: August 15, 2015, 04:00:58 pm »

LOL! Why Re Envent the Wheele when it's been done for you and explained how it works?

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	Re: All things SurfPI, a comprehensive summary of useful links. « Reply #6 on: August 15, 2015, 04:51:07 pm »

I suppose your right... but not everyone can see a circular object , apply some logic and come up with the wheel Bang Head

(you have seen some of the posts on this site Grin

... lol) they need to get some hands on experience first. Just because we have the wheel and know what it is for, some long lost tribe might not have a clue. Round About

Then there is future development, we would not have the tyre now (still in constant development), if someone had not seen a problem with the wheel!
So I'm not going to argue. This is just a place to get all the simple, yet useful information relating to the SurfPI together for all the people who struggle with this project.
Basics first.

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	Re: All things SurfPI, a comprehensive summary of useful links. « Reply #7 on: August 15, 2015, 05:03:16 pm »

You keep at it mate, no such thing as useless information as long as it's correct information. I for one have a habit of breaking down schematics because by doing it I find new ways of going about doing things and sometimes how not to do them.

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GoldDigger1950

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	Re: All things SurfPI, a comprehensive summary of useful links. « Reply #8 on: August 15, 2015, 05:42:19 pm »

	Quote:	Posted by Lord Dracon
(you have seen some of the posts on this site ... lol) they need to get some hands on experience first.

I understand how they feel about buying a metal detector. A decent one is going to cost about the same as a trip the grocery store at the low end and around the price of a decent used car at the upper end. That's a lot of cash to lay out for a speculative hobby.

What they don't realize is that if you go out 3 days a week and gather 200 coins with an average value of 5c, that means you take in $10 a week just in coins. Add in the occasional piece of jewelry or valuable relic and you could be looking at $50 a week or more. Do that for 6 months and you have $1200 in just about face value alone. In three years time you would have paid for that top of the line detector.

But when you are on the outside looking in, it can be very scary.

For those of you who thought 200 coins a week was a lot, that's what I do in a single session these days. But then, the computer between the headphones is trained to know where to look. Just like a lot of the guys here who go out regularly.

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	Re: All things SurfPI, a comprehensive summary of useful links. « Reply #9 on: August 15, 2015, 11:34:58 pm »

The GT links in post 5 work for me.

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