TESORO GOLDEN SABRE

[simonbaker]

simonbaker
which are the other resistors which need to be removed (need-a-pic)
if you guys spot something wrong with the board let me know

cheers

I'm pretty sure the resistors circled in blue are the ones -- left over from the battery check. They don't cause any problem though.

I've been labeling all the parts on your PCB for my own understanding (not on attached picture). So far I haven't seen any errors, but I'm not completely deriving a schematic from it, which would be best check.

I am trying to re-draw the PCB using ExpressPCB and then adjust some parts dimensions for my oddball components. Also spreading it out a little to make it easier to experiment with and test. Taking a long time -- if I ever get it built I'll let you know if any problems!

I definitely appreciate layout work done by others. Very hard to do from schematic I'm sure.

Cheers,

-SB

[tiktak]

Happy new year!

Hi,
I wish to all folks here many good projets and finds in comings 2009.

[simonbaker]

Eclipse Schematic

Hi Eclipse:

Do you have schematic for your latest PCB?

I only have schematic for "TGSL Gift Pack" with monostable and no battery check, and another of TGSL with battery check and no monostable.

I think your PCB is no monostable, no battery check. Is there a schematic for that?

Thanks!

-SB

[eclipse]

Simonbaker this is the schematic from "gift-pack" - 1265
and should be almost identical to Ivconic's design, except the layout differences. No monostable or any other mods.
Offcourse credits are for Ivconics design, I only redesigned the board for different box size and components.

[Eugene52]

TESORO GOLDEN SABRE

Hello All , IVCONIC is the Great Technician who re-built and improoved the Golden Sabre and re-shaped the PCB Board to fit in a inexpensive housing , re-named "Golden Sabre LIGHT-1265 . All I did was make a zip Folder and called it a "Gift Pack" to send to "always Happy" Guru kt315 and a few other Happy Members Here . I have not seen Ivconic in Weeks but I wish him a Happy New Year !!! Last I heard he was working on another Great project , fixing / improving Tesoro Eldorado . Happy New Year to Everyone on Geotech . I have a strong feeling that "2009" will be a year of progress on both the "Geotech Forum" and the great new/improoved "THunting.com".............Take Care Everyone...............Eugene52

[simonbaker]

Simonbaker this is the schematic from "gift-pack" - 1265
and should be almost identical to Ivconic's design, except the layout differences. No monostable or any other mods.
Offcourse credits are for Ivconics design, I only redesigned the board for different box size and components.

I opened Gift Pack zip file and the only schematic I find has monostable.

Can you check, maybe there is another zip file somewhere?

Thanks,

-SB

[eclipse]

Actually if you open the board (lay file) in this package you will see the same board design as mine - I don't think there is matching schematic for that board. So there is no actually schematic matching 1:1 for this board, but you can use the monostable schematic, the only thing that the board doesn't match is the new audio stage there. Everything else should be exact the same, or there is error on the board.

[Eugene52]

TESORO GOLDEN SABRE

Actually if you open the board (lay file) in this package you will see the same board design as mine - I don't think there is matching schematic for that board. So there is no actually schematic matching 1:1 for this board, but you can use the monostable schematic, the only thing that the board doesn't match is the new audio stage there. Everything else should be exact the same, or there is error on the board.

Thank-You ECLIPSE !!!! You answered a Question today , that is always asked here on a regular basis . Is there a Final Schematic ??? OR is there a Final PCB LAYOUT Photo ???? So EVERYONE ......REMEMBER : The schematics posted on Geotech are 95 to 99 per cent correct ! The PCB circuit Boards are 95 to 99 per cent correct ! Several projects by " OUTSTANDING GEOTECH MEMBERS" have been completed , but when they are done they post results in writing and sometimes do not have time to finalize any drawings or schematics , because they are outside finding Gold!!!! Everything you need is Here on Geotech or in the Geotech Archives . All projects except for 2 ....Have been completeted !!! And If anyone sees IVCONIC , also Wish him a Happy New Year 2009 !!!!!!!...............Eugene52




DO NOT FORGET TO VISIT THE NEW IMPROOVED Thunting.com , Especially when things are Slow over here on Geotech !!!!!

[simonbaker]

Thank-You ECLIPSE !!!! You answered a Question today , that is always asked here on a regular basis . Is there a Final Schematic ??? OR is there a Final PCB LAYOUT Photo ???? So EVERYONE ......REMEMBER : The schematics posted on Geotech are 95 to 99 per cent correct ! The PCB circuit Boards are 95 to 99 per cent correct ! Several projects by " OUTSTANDING GEOTECH MEMBERS" have been completed , but when they are done they post results in writing and sometimes do not have time to finalize any drawings or schematics , because they are outside finding Gold!!!! Everything you need is Here on Geotech or in the Geotech Archives . All projects except for 2 ....Have been completeted !!! And If anyone sees IVCONIC , also Wish him a Happy New Year 2009 !!!!!!!...............Eugene52

You said it perfectly!

My current project is to start with Eclipse's PCB (minus a couple of unneeded resistors) and transfer to ExpressPCB format (free program). However, my component sizes may be different and the traces will be drawn a little differently, and the board size will be much bigger to begin with (4 x 6). But it is a starting point, and I'll post it eventually if anyone wants to improve it, etc.

I have also created a schematic in ExpressSCH format that is drawn as close as possible to Ivconic and Gift Pack schematics, but removing components so it matches Eclipse's PCB (minus the unneeded resistors). So hopefully it will be a matching PCB and Schematic. Of course, I may make some errors so I'll be building and testing first.

Cheers!

-SB

[ivconic]

Huh, to much fuzz here, without such need!?
There are NOT "uneeded" resistors there? Who give you such idea? Those resistors there prevents opamp's inputs and output to flow. So keep those there.
I think i already posted my final (and best) work on this subject!? I am not sure (lazy to search back the pages). So i am posting complete final work again here. You have here all you need to complete device. No mistakes. Works perfect. You have schematic and .lay file here. Enjoy!

P.S.
There are coupling capacitors (0.1uF) at major points (according to my humble opinion) that must be coupled.
No monostable mod in this last version; simply no need for it. Monostable can provoke some instability, so i decided and left that idea. Further, audio is modded and boosted a bit with much better solution, no need for monostable at all.
This is FINAL version, most accurate and best so far. No need for further confusing about this subject.

[ivconic]

"..Monostable can provoke some instability.."
Actually monostable cant do that. But monostable input is so sensitive, it can be switched On by slitest hum from previous stage. Pitty. I experienced huge "instabillity" and lot of falses on real soil. To overcome the problem, coil must be hold 10-15cm away from soil surface - which is huge drawback...logically..
So... trying this and that...finally i decided and left that idea.
Other hand, new audio applied on last version is real bijou! I am very satisfied with it! Works fantastic. You must try to see!
This last version became my working detector and aproved itself several times in last 3 months. So stabille i cant explain!? It is calm, silent and stabille that much - in the begining i checked many times if device is switched On?! With no metal in soil i can walk 200-300 meters with no sound at all, no hum, no nothing....silent as a fish!
When detects something, audio is strong,soft and rich...also target depth&size&type dependable...just what i always wanted!
But pay attention on BD140 there. Must be a kind. I checked many simillar transistors and all those are not working the same. By trial&error i found out BD140 as most suitable, giving most pleasant tone.

[simonbaker]

Huh, to much fuzz here, without such need!?
There are NOT "uneeded" resistors there? Who give you such idea? Those resistors there prevents opamp's inputs and output to flow. So keep those there.
I think i already posted my final (and best) work on this subject!? I am not sure (lazy to search back the pages). So i am posting complete final work again here. You have here all you need to complete device. No mistakes. Works perfect. You have schematic and .lay file here. Enjoy!

P.S.
There are coupling capacitors (0.1uF) at major points (according to my humble opinion) that must be coupled.
No monostable mod in this last version; simply no need for it. Monostable can provoke some instability, so i decided and left that idea. Further, audio is modded and boosted a bit with much better solution, no need for monostable at all.
This is FINAL version, most accurate and best so far. No need for further confusing about this subject.

Great, much appreciated!

Also, good point about "unneeded resistors". A question I have been meaning to ask was whether inputs and outputs of unused op amps can be floating or should be "tied off" somehow to prevent oscillations or other effects. I know some components need it, but not sure with op amps.

So, if that's the case, sorry for bad advice -- Ivconic says keep resistors R48, R49, R50, R51 (connected to LM358 U107b) even if not using battery check circuit.

Cheers,

-SB

[eclipse]

Thank you ivconic you are always so helpfull, we really appriciate your efforts!

[simonbaker]

Huh, to much fuzz here, without such need!?
There are NOT "uneeded" resistors there? Who give you such idea? Those resistors there prevents opamp's inputs and output to flow. So keep those there.
I think i already posted my final (and best) work on this subject!? I am not sure (lazy to search back the pages). So i am posting complete final work again here. You have here all you need to complete device. No mistakes. Works perfect. You have schematic and .lay file here. Enjoy!

P.S.
There are coupling capacitors (0.1uF) at major points (according to my humble opinion) that must be coupled.
No monostable mod in this last version; simply no need for it. Monostable can provoke some instability, so i decided and left that idea. Further, audio is modded and boosted a bit with much better solution, no need for monostable at all.
This is FINAL version, most accurate and best so far. No need for further confusing about this subject.

Hi Ivconic:

Thanks for latest design. But ".lay" file does not seem to have component values labeled. Do you have another file with labels?

Also, can you explain "coupling capacitors" (.1uF) more? Did you put them on PCB or schematic? What is function?

Regards,

-SB

[eclipse]

I suppose the coupling capacitors are on the solder side of the board, but what location are those ? Perhaps they are the reason for the calm operation of the deviced + the bigger GND ring around the board outline.
Yup there are no labels on the board, would be good to have them labeled, the board is very nice, small size could fit to many small md boxes, hmm perhaps I should try it