GOLDSCAN 5 SCHEMATIC QUESTION

[dbanner]

yes i have the timing data somewhere, and no i haven't had the time to build and verify. It's something i would like to do but most people seem to be stuck on surf and baracuda in perpetuity.

[6666]

Seems no interest anymore. anyway, here is good layout i did some time back.

Thanks Dbanner, did you build it to prove it works ?, and do you have the timings ?

[dbanner]

Seems no interest anymore. anyway, here is good layout i did some time back.

[daverave]

Hey Dave
here in Australia they are having good success with Neurofolin which contains L-methylfolate, an active form of folate that addresses part of a complex deficiency found in people with depression
its a simple over the counter supplement that can be purchased without prescription under various brand names in pharmacies.
http://www.9news.com.au/national/201...ralians-suffer

Hi 6666.....many thanks for your advice concerning depression...its something ive had for a long time but got worst cause of different things that have happened to me in the past
it just interfears at times with me being able to do things like my electronic projects.....to be honest i do not trust the pharma companies anymore
cause of all this forced vaccination business which is a big problem i believe in australia...america..and now parts of europe...people should be able
to choose for themselves...so i mistrust pharma now and prefer to go the natural way.

[6666]

Hey Dave
here in Australia they are having good success with Neurofolin which contains L-methylfolate, an active form of folate that addresses part of a complex deficiency found in people with depression
its a simple over the counter supplement that can be purchased without prescription under various brand names in pharmacies.

http://www.9news.com.au/national/2017/09/16/19/12/depression-folate-supplement-australians-suffer

[daverave]

ive not done any projects for several months cause of my depression problems......so GS 5 on hold for now...i did manage to do some detecting on beach and found a palladium wedding band ring...but ive now returned it to its owner...i read on another site fisher are teaming up with the french guy who developed the manta detector and doing a discriminating iron pulse machine...bet it will be very expensive.

[eclipse]

Goldscan 4 for sale with deffect (“It all works but has gained a small problem it detunes itself”) in good condition for 250GBP.
Old, used and broken it goes for high bucks, it's just like when you buy Lamborghini or Ferrari and you sell it it after XX years it still fetches good bucks.

Anyone made progress on the 5th GS ?
I'm still stuck on the PIC32 software, decided I want audio controlled by the MCU, instead of using descrete components, so it takes lots of time.

[kt315]

Dbanner, suggestion to use something more advanced

http://www.geotech1.com/forums/showthread.php?11673-PCB-CAD-CAM-Software

sincerely yours

[Toros]

With what TL052 is better than TL062 ?

[dbanner]

this is my proposed layout for main board. VCO audio and power supply will be on seperate boards. All components have been labelled. Some mistakes have been corrected.

[daverave]

Hi Eric...i didnt realize that the 337T was a way of allowing different coils to be used with GS 5..the circuit i made at the time based on the geotech GS 5 schematic part 1...i was trying to make the front end circuit very compact to fit into a 50mm plastic tube and so maybe there could have been an error in my layout causing the circuit to draw 750 mA.

[Ferric Toes]

Hi All,
My original GS5 had a current limiter originally using a couple of transistors and later the 337T negative regulator wired as a constant current device. This was largely so that you could use other manufacturers mono coils that had a much lower resistance than the ones I made. This limiter kept the mean current at 600mA whatever the weather.

Eric.

[daverave]

supply voltage around 15v

[Orbit]

a few months ago when i built the first stage of GS 5 i set the TX width at 120 uS and transmit frequency at around 3 khz and my back emf was around 750v and my total circuit consumption at around 750 mA...if i increase the frequency control to around 3.3 khz then my consumption go's up to around 850 mA....at this rate my batteries will last only about 3 hours search time which is not good in my view. For me GS 5 should be built according to as near to spec as possible.

With which voltage you supplied ? It's a little weird that much energy ?

[daverave]

a few months ago when i built the first stage of GS 5 i set the TX width at 120 uS and transmit frequency at around 3 khz and my back emf was around 750v and my total circuit consumption at around 750 mA...if i increase the frequency control to around 3.3 khz then my consumption go's up to around 850 mA....at this rate my batteries will last only about 3 hours search time which is not good in my view. For me GS 5 should be built according to as near to spec as possible.