TDI PRO PROJECT COMPLETE

[Carl-NC]

I have few questions about the pots/external connections, maybe you can provide some help if you keep notes.

Probably I can help.

[Elliot]

its a very good box to use and i found the detector not too heavy and very well balanced...be nice to see a photo of your detector when completed.

The UK Ultra Box was successfully used on another Pi machine here too https://www.youtube.com/watch?v=VmGORWpQMog&t=58s

[eclipse]

Thanks Carl, here are few questions I have:

1. On the bottom side there are Frequency and Delay connectors - I'm going to try 100K potentiometers /is that OK/
2. The threshold connector - I'm going to try 100K potentiometer /is that OK/
3. The ground balance connector is 4 pin connections are not very obvious at the moment
4. On the top side what is the P1 connector, it's not labelled what it is, perhaps GAIN, in the SL the GAIN it's 100K but here probably a 50K is more appropriate value?

[Carl-NC]

1. Freq & Delay were originally 10k. Still, 100k will probably work.
2. Threshold is 100k.
3. On the GB connector, 2 pins (1 & 3) are for the 100k pot connection. The other 2 pins (2,4) are for shielding. The wiring for the pot should be small shielded coax. S-video cable would work.
4. As I recall, P1 is shorted for calibrating the backend circuitry. I don't remember the procedure so try not to mess with trimpots.

[eclipse]

Thanks Carl.

I will let you know when this thing fires up, hopefully no smoke.

[Elliot]

Hi pustareka...my project is all new and very stable...the 8 uS delay is useful for dry sand but too low for wet sand use...maybe in a few months time i will start a third tdi project with modifications for even better depth but not waterproof next time...i really like the design of GS 5/TDI....i think eric's design is the best all round pulse detector.

G'Day Daverave. I always thought that a 8uS sample delay was too low for wet sand use too, but I've since learned otherwise with this new design. I used it successfully at 8uS in wet sand with no problems whatsoever. https://www.youtube.com/watch?v=1b__o20ziJw&t=237s

[daverave]

Hello Elliot...Did you make the aqualand detector yourself and if so what circuit is your detector based on ????

[surfdetector]

Hello Elliot...Did you make the aqualand detector yourself and if so what circuit is your detector based on ????

Here is the thread
https://www.geotech1.com/forums/show...D-Coil-Options

[daverave]

Hi surfdetector...thanks for the link..

[Orbit]

My TDI ...www.youtube.com/watch?v=BLoIkjD0HWo

[Altair]

My TDI ...www.youtube.com/watch?v=BLoIkjD0HWo

Splendid!
Congratulations for your hard work!
I have sent you a P.M.

[Orbit]

Splendid!
Congratulations for your hard work!
I have sent you a P.M.

I'm sorry, contact Whites electronic ....

[Sean_Goddard]

Are these new builds or simply re-boxing a TDI PCB?

Does anyone have a PCB/Schematic I can have a copy of please?

[daverave]

i dont have a TDI pro schematic...my two TDI's are based on GS 5 and have been modified to the Pro version and operate at 8 uS delay.

[surfdetector]

i dont have a TDI pro schematic...my two TDI's are based on GS 5 and have been modified to the Pro version and operate at 8 uS delay.

Is your modified GS5 project one that you are able to share a schematic of with the forum?
Cheers