GOLDSCAN 5 SCHEMATIC QUESTION

[Koala]

It was 2014 but someone here claims to have the schematics

http://www.findmall.com/read.php?34,1935936,2099839

[daverave]

ok thanks for that Koala.

[6666]

I went down the GS5 path a few years ago , but abandoned it due to unproven or unconfirmable information .
What are your design expectations for this detector ?.

Carl has made you a great offer, if you can get your signal past the documented GS5 preamp you could be on a winner,

[Carl-NC]

Dave, do you work with micros? The GS5 used a 555 + discrete logic clocking whereas the TDI used a micro which makes all the clocking and frequency control easier. The code I wrote for the PI3 in ITMD is probably not far from what is needed to replicate this function.

The GS5 and original TDI used an AD654 V-to-F chip to create the hi-lo tones through separate amp paths. In the TDI-SL I replaced the pricey '654 with a simple 555 that exactly replicated the tones. It would take me a lot of thinking to re-figure out how I did that, my suggestion instead is to slap on a simple 555 VCO just to get the thing to run. You can make something better later.

[Orbit]

4001 the signal that the signal is not wide, that she does not respond when the object passes ! To get a clear difference Between two tonnes !

https://www.youtube.com/watch?v=dV-3yKez6YY

vco 555 pin 5 !

[daverave]

Dave, do you work with micros? The GS5 used a 555 + discrete logic clocking whereas the TDI used a micro which makes all the clocking and frequency control easier. The code I wrote for the PI3 in ITMD is probably not far from what is needed to replicate this function.

The GS5 and original TDI used an AD654 V-to-F chip to create the hi-lo tones through separate amp paths. In the TDI-SL I replaced the pricey '654 with a simple 555 that exactly replicated the tones. It would take me a lot of thinking to re-figure out how I did that, my suggestion instead is to slap on a simple 555 VCO just to get the thing to run. You can make something better later.

Hi Carl...Unfortunately i cannot do programming....many years ago i did try and learn pic programming but it got too heavy for my mind and i gave up...as you say a simple 555 vco will do the trick for now...i like a challenge and the gs 5 will be a good project.

[daverave]

[ATTACH]40017[/ATTACH]

4001 the signal that the signal is not wide, that she does not respond when the object passes ! To get a clear difference Between two tonnes !

https://www.youtube.com/watch?v=dV-3yKez6YY

vco 555 pin 5 !

thanks Orbit for that link

[daverave]

[ATTACH]40017[/ATTACH]

4001 the signal that the signal is not wide, that she does not respond when the object passes ! To get a clear difference Between two tonnes !

https://www.youtube.com/watch?v=dV-3yKez6YY

vco 555 pin 5 !

that youtube video is really nice how he has modified the gs 4 with gs 5 audio....i love the gs 5 audio and hope one day i can do that in the future.

[ionut_mtb]

Can someone explain me how discrimination is working on this detector? Is ferrous/non ferrous or low conductive/ high conductive target.

[daverave]

Can someone explain me how discrimination is working on this detector? Is ferrous/non ferrous or low conductive/ high conductive target.

im not sure how the disc works on the gs 5 but i know its something to do with the ground cancelling circuit.

[kt315]

Can someone explain me how discrimination is working on this detector? Is ferrous/non ferrous or low conductive/ high conductive target.

not ferrous not non ferrous not low high conductive. NOTHING. NO DISC like you have in a VLF.

it was done ONLY (SIC!!!!) for small gold nuggets, 0.5...1... 2 gramm... very specific detector especially done for australian conds and some regions of US gold fields. for beach maybe if you want find very tiny chains.
i dont understand why people so want the spec detector if they do not have gold sand around.

Eric on beach in Australia. black sands. is that clear my explanation?
http://www.findmall.com/read.php?34,...70#msg-2303370

[daverave]

hi kt...i thought gs 5 can reject some iron in ground cancell mode...i think the iron has to be in a horizontal position to be rejected...but in ground/disc mode you loose some depth from what i understand.

[Qiaozhi]

Can someone explain me how discrimination is working on this detector? Is ferrous/non ferrous or low conductive/ high conductive target.

The discrimination on the GS5 is definitely not ferrous/non-ferrous. It's the same as the TDI, which purloins the ground balance function to give a different audio tone for targets either above or below a particular setting.
http://www.detectorprospector.com/go...n-settings.htm

[mickstv]

Re the audio section, i've posted my method a few time on the forum. Here it is again.....

Hi/Lo tone and audio level rise from threshold.

[eclipse]

Yes that is the schematic I was referring to, thanks mickstv