pin for strength signial and conductivity

[windaube]

hi

I want to add an arduino with screen to display the "strength signal" and the "conditivity"

what pin use for connect to arduino?

sorry for my bad english

thanks

[waltr]

The outputs of the differential stages is what you want to use.
However, being that these are AC coupled and filtered these are basically Band Pass Filters at around 10Hz.
Therefore the Arduino needs to watch for a threshold Voltage then Capture both signals and do math.
The Conductivity would be a Phase Angle and is the Arctan of the ratio of the two signals.

Check Roderico's thread on the VDI from IDX and TGSL here:
https://www.geotech1.com/forums/show...3-VDI-RODERICO

In this thread are discussions and schematics and PIC C code. This is what I use on my TGSL and it works very well.
The Code is for a PIC processor but in C so would not be difficult the port the the Arduino.

Also check Dbowers VDI project using an Arduino here:
https://sites.google.com/site/dbcoil...di-experiments

[windaube]

Thank you
I found the diagram to connect an arduino or another microcontroller.
but I don't know where to find the point X and Y on the diagram ?

[waltr]

Thank you
I found the diagram to connect an arduino or another microcontroller.
but I don't know where to find the point X and Y on the diagram ?

Do you mean where to connect in the TGSL Schematic??
The common points are after the first differential stages which are U103 pins 1 & 7 in the schematic from the TGSL101.pdf document.
X is the GB channel (U103-7), Y is the Disc channel (U103-1).
It is then common to add another differential Gain stage to feed the ADC inputs as per Roderico's VDI schematics.

Have you built and have working the TGSL??
Then connect the two O'scope channels to these points and set the O'scope to X-Y to see the relationship.
This is basically what the VDI processor code does.

[windaube]

Have you built and have working the TGSL??

no I check each step to be sure not to be blocked during manufacture.
the construction of the tgsl will will begin soon

to add a vdi I think use the "VDI-RODERICO" projet for schematic, but replace the PIC with an arduino.

I don't know how to program at PIC and I don't have the equipment to flash it,but i know arduino.

I think I used this code, and modify it
https://www.geotech1.com/forums/show...uino-based-VDI!

The common points are after the first differential stages which are U103 pins 1 & 7 in the schematic from the TGSL101.pdf document.
X is the GB channel (U103-7), Y is the Disc channel (U103-1).

you answered my question perfectly

[waltr]

Sounds good and your English is very good.

Either a PIC (which I know) or and Arduino (which you know) can do the VDI.

Please post back here on your TGSL and VDI builds.