Serbian pi Gold-Skan

[TH Jim]

So, no one else has a home built GoldScan with working iron discrimination????

[paku]

same i dont have that project
now i just make XR-71 still not finish yet

[maikl]

Hi folks,

I see a lot of similarities on these GS schematics to the SurfPI circiut. I have a load of spare parts for surfPI, so I'd like to build one of these GoldScans, but. Apart from Orbit, has anyone else got one of these GS machines to work well, i.e with working iron discrimination?

Regards, Jim.

Yes, and I also want to know...

[liudengyuan]

good

[liudengyuan]

The machine's circuit principle diagram and the PCB if there is any mistake? Please master detail, thank you very much

[eduardo1979]

Hello. I redesigned the scheme GS6 with the help of the original scheme, but there is something I do not know if it's okay.
I ask please Orbit to review this scheme, because I have some doubts and I'm not sure that all is well. Orbit is the author of this scheme and therefore we ask for your help. I have done this project, but has problems with iron discrimination. I have also done the GS4 and it works perfectly and iron discrimination is almost perfect. Gs6 is a very interesting project for me, but I have serious doubts about the connections of the two CD 4093 and CD 4066.
Kind regards.

[greylourie]

Hello. I redesigned the scheme GS6 with the help of the original scheme, but there is something I do not know if it's okay.
I ask please Orbit to review this scheme, because I have some doubts and I'm not sure that all is well. Orbit is the author of this scheme and therefore we ask for your help. I have done this project, but has problems with iron discrimination. I have also done the GS4 and it works perfectly and iron discrimination is almost perfect. Gs6 is a very interesting project for me, but I have serious doubts about the connections of the two CD 4093 and CD 4066.
Kind regards.

Hello Eduardo,
I see on your Eduardo1979 schematic, you have RV6 for adjusting ground balance.
If you look at this post from Reg here : http://www.geotech1.com/forums/showt...448#post123448
You will see him talk about Switch 1a. Look at this switch and see how it operates in the original schematic by Alexis.

Further, look at the following posts by Reg and Jose.
http://www.geotech1.com/forums/showt...376#post162376
http://www.geotech1.com/forums/showt...458#post123458
http://www.geotech1.com/forums/showt...403#post181403

By using a switch 1a, in place as shown in Alexis original. The user has the ability to select signals from BOTH channels. Or ONLY from the Gold channel. Remember that the Gold channel samples earlier than the Iron channel.
Examine the difference between the output on Alexis IC3 between pin7, and pins 9 and 10. Compare that with Orbits U6b pin7 and pins 9 and 10. This is where you can follow the suggestions made in the linked posts to select a Low or High signal.
Reading the posts I linked to above will help you understand what is happening.

Orbits machine is a very nice example. If I had the time and spare money I would build it. And try implement the ideas shown in the 3 posts I linked to above.

Thanks for sharing your work with us.

[bernte_one]

hello erduardo

have you redrawn the layout from orbit for sprinlayout (i know you work with sprint layout)
or did you use the black/White Image from the entry post

i am interested in the sprintlayout file
if nobody has done this already i would Import it to sprint layout and post it here the next days
so we have also a base for future improvements

[eduardo1979]

hello erduardo

have you redrawn the layout from orbit for sprinlayout (i know you work with sprint layout)
or did you use the black/White Image from the entry post

i am interested in the sprintlayout file
if nobody has done this already i would Import it to sprint layout and post it here the next days
so we have also a base for future improvements

I have no design in Layout. I used the black-white design that Orbit published. Sorry.

[liudengyuan]

good,good,good

[bernte_one]

ok, no excuse please

i will make the layout file next days

[Orbit]

the point is setting !
rule set time gold and iron channel !

[liudengyuan]

no.no.no

[samii]

GOLDSKAN.rar Sprint Layout 5 PCB attached.

[liudengyuan]

The circuit principle diagram is wrong