Pi schematics

[Anonymous]

Help required for Pi schematic
Dear forum members I am seeking your help to find a Pi schematic to build a Pi test bed to evaluate some new concepts in ground balancing and to test some new coils. The requirements for the Pi platform are:
1. Adjustable variable length transmit pulse length time from 20-1500u seconds
2. Adjustable dead time and sampling time from 10-100 u seconds
3. Ability to incorporate various programmable gain and differential op amps into the circuit
4. Continuously adjustable coil damping resistors
5. High current switching transistors with voltage breakdowns of at least 600 volts
6. Circuit flexibility to incorporate various A/D, D/A and DSPs
7. NO ground compensating circuitry
8. Circuit flexibility to remove op amp offset voltages
9. Ability to change the pulse repetition rate
If such a schematic is not available, are then any Pi units that could be modified to become our test bed. I have access to Gold scan 3 and to old mine lab machines. Could Corbyns circuit for example be suitably adapted as a test bed? Does anyone have any ideas?
Thanking you all
Leolovar

 

[Anonymous]

Hi Leovar,
A good PI to start with is already in Kit form. It is the Hammerhead project designed by Carl Moreland. The nice part about this unit is all the information available to get you started.
Obviously, this PI doesn't have all the requirements you have listed, but it has a good base from which to start.
You might want to check it out. I have added a link that will allow you read more about this project. There is a full explanation of how it works and schematics available at the site.
Reg

 

[Anonymous]

Maurice, Reg is right..., i

 

[Anonymous]

Hello Capela:
I tried to open P1.froumforfree,but i could not open it.
Please send me the new shematic in my email.
Best Regards,
Aban

 

[Anonymous]

Hi, contact me at my mail i think i can help you )

 

[Anonymous]

Hi, here is the link to my HH

http://p1.forumforfree.com/allmetals.html