IDX-PRO+VDI

[jlsilicon]

So,
I rewrote the Arduino Code to input an Array of values,
- and now I get a lot better clarity in the data.

I think I will add another OpAmp to increase the Gain more.
I don't need to read the data at 2cm range;
- its not used in the field at that range anyway.
The results are skewed that close to the coil.

[zoomix]

hello,

Can you give me more info on adding two diodes?

A Where you place these diodes?
Is the 1N4148?

VDI geotech module does not respond to a good distance.

I 've realized the VDI lugatek module and I have a +45 display on steel.

On the oscilloscope, the X and Y outputs are 400mV (PCB IDX)

Can not set to 0 for aluminum, potentiometer 4K7 has no influence ..

About VDI input schema, Somebody could tell me if this is an integrator assembly / diverter or differential amplifier ?

What part I could change to improve reception?

Thanks

[jlsilicon]

You connect ADC0 to X and ADC1 to Y on the IDX board.
Or, you can connect ADC0 and ADC1 to the Outputs from U3B p1 and U3D p14.

The Diode(s) are on the IDX Board.

hello,

Can you give me more info on adding two diodes?

A Where you place these diodes?
Is the 1N4148?

VDI geotech module does not respond to a good distance.

I 've realized the VDI lugatek module and I have a +45 display on steel.

On the oscilloscope, the X and Y outputs are 400mV (PCB IDX)

Can not set to 0 for aluminum, potentiometer 4K7 has no influence ..

About VDI input schema, Somebody could tell me if this is an integrator assembly / diverter or differential amplifier ?

What part I could change to improve reception?

Thanks

[jlsilicon]

Off-handedly,

Could we use a Potentiometer of say 10ohn or 2ohm between the RX Coil and the OpAmp - and just use a constant 33nf cap,
- instead of fidgeting with different Capacitors around 33nf ?

Wouldn't this be easier to adjust ?

[zoomix]

Off-handedly,

Could we use a Potentiometer of say 10ohn or 2ohm between the RX Coil and the OpAmp - and just use a constant 33nf cap,
- instead of fidgeting with different Capacitors around 33nf ?

Wouldn't this be easier to adjust ?

Jlsilicon, I think I do not need capacitor on tx and RX because I have an original coil loop 950

Everything works fine ... there was a split in path on the PCB lugatek.

Completely Invisible. I saw with meter. DM-1 lugatek ok

Thank you for your help ..

[emoxristov]

Please upload simulation Proteus for VDI

[holyuser]

Will be soon. Be patient.

[salih]

I can detect the coin of copper and aluminum 2.4mm in the air 33cm
And also 4 * 4 mm copper nugget in the air 10cm
my coil =TX 17.5cm RX 8cm Similar xlt But with different lengths and taking into account the frequency

Please give me tips
1-depth sensitivity in the ground is weak compared to the tests the air?
2-We have two votes pin point and natural sound Imagine no regular land. Supposed to adjust the GB to be one in a pin point or natural sound. I have a problem in a pin point I have to adjust the GB if I'm back to normal voice I have to adjust the GB again ????

[ricalbertvig]

Support 2 tones?

can someone tell me what part I find the way to put a switch for the 2 tones, not having to replace components .. is that I saw somewhere I've searched and can not find it .. I need if anyone can help me with part in the forum where it gets a switch for 2 tones?

[Silver Dollar]

Here's a 2 tone mod that seems to only work in PP mode;

[golfnut]

I think that the Pin point is a bit of an optical illusion,, The Pin point text is for the Switch. Not the 2 tone mod..

[Silver Dollar]

Well pin 1 of the 393 gets pulled negative so cuts off the 2nd tone when the PP button is pushed...

[golfnut]

maybe your right I cant quite work it out now you've said!

[jlsilicon]

Thanks for the help from the users.
I got my original working with about 1 foot range.
Enough to work with for the time being.

[jlsilicon]

My Project goes beyond the original designs
- and seems to be quite successful !
More info later ...