IDX-PRO+VDI

[eduardo1979]

Here it is and it works great. Is proved.

[sinko1]

Hello, eduardo1979 maybe you mod idx-pro with two tone?

[eduardo1979]

[silverdog]

Hello Silverdog,
If connected to power no more then 50-75 mA ? There is +8V on U1/7 and ca.-8V on U1/4 ?
If you connect the tx coil on the board you have a good signal ? Can you check this with a scope ?
If you have a good TR signal then check the signal at the unconnected receive wire from the coil... must be a signal from some mV's and response if you move metal under the coil
If you have receive signal that is responding to metal then connect the receive wire's to the board.
Now look if you have the same "un connected" signal at U1/3 if so then look at U1/6. You must see a larger signal at U1/6 then on U1/3 ..
If no signal replace U1, if small signal check the parts R2-C2-R1-C32. If no success.. disconnect C3 and look again.
Check also C1... that cap is also the one you need for adjusting the tr/rec. freqs... look at the output U1/6 if you chance C1.

Succes

Ap

IDX is working ok !

It was my stupidity, I has placed a 40106 instead of 4066

Onto the VDI next

Silverdog

[holyuser]

So the VDI can be used for all VLF detectors, if there is phase differents between X and Y (ground and disc channel ?)

Yes, I suppose, but not tested.

The power for the VDI board can be taken from the detectors board ?

Yes, the VDI supply voltage may be in the range of 5,5 to 16 volts, if MCP1703 used.

and if regulated out from the detector is connected to the VDI board there is also a Batt. Check function ?

Should be works.

[ApBerg]

I had another play last night with the Whites shooter DD coil, there does actually seem to be an RX waveform, although very, very small I can see it amplfy if I place a pair of pliers near the coil

Being an amateur could anyone help, I would love to get this project going
Is my coil just incompatible, is the Rx signal I'm seeing real or noise induced or something ?

poking in the dark

Silverdog

Hello Silverdog,
If connected to power no more then 50-75 mA ? There is +8V on U1/7 and ca.-8V on U1/4 ?
If you connect the tx coil on the board you have a good signal ? Can you check this with a scope ?
If you have a good TR signal then check the signal at the unconnected receive wire from the coil... must be a signal from some mV's and response if you move metal under the coil
If you have receive signal that is responding to metal then connect the receive wire's to the board.
Now look if you have the same "un connected" signal at U1/3 if so then look at U1/6. You must see a larger signal at U1/6 then on U1/3 ..
If no signal replace U1, if small signal check the parts R2-C2-R1-C32. If no success.. disconnect C3 and look again.
Check also C1... that cap is also the one you need for adjusting the tr/rec. freqs... look at the output U1/6 if you chance C1.

Succes

Ap

[silverdog]

I had another play last night with the Whites shooter DD coil, there does actually seem to be an RX waveform, although very, very small I can see it amplfy if I place a pair of pliers near the coil

Being an amateur could anyone help, I would love to get this project going
Is my coil just incompatible, is the Rx signal I'm seeing real or noise induced or something ?

poking in the dark

Silverdog

[ApBerg]

Hello ApBerg,

VDI work does not depend on the TX frequency of the MD.
Is essential phase angle between x & y channels .

Best regards.

Thanks .....! So the VDI can be used for all VLF detectors, if there is phase differents between X and Y (ground and disc channel ?)
The power for the VDI board can be taken from the detectors board ? and if regulated out from the detector is connected to the VDI board there is also a Batt. Check function ?

This is nice ! Thanks again !

Ap

[holyuser]

Hello ApBerg,

VDI work does not depend on the TX frequency of the MD.
Is essential phase angle between x & y channels .

Best regards.

[ApBerg]

Here You are:

Hello Holyuser,

First thanks for this nice projeckt ! , also for Eduardo ! I have some small boards from Silverdog and they work ok (I think), nice the 'Geotech' welcome at start up.

Now I like to know in what freqency rance can Holyusers VDI be used, work they also on 14Khz ? the Tesoro freq's.

Best regards.

Ap

[holyuser]

Here You are:

[6666]

In the file Geotech_VDI.rar

there is a pdf file called ?????????.pdf

I cannot open it, is anybody having trouble opening that pdf ?

[eduardo1979]

IDX-PRO+VDI

The VR3 is the regulator of the phase. Here is all the information needed for this project.

[silverdog]

A bit of help required

Connected up the Whites shooter coil over the weekend to the IDX, no joy

I seem to have a nice TX wave but nothing on RX, as there is no cap on the pcb is it possible there is no cap in this coil ?

Eduardo could you explain what you set VR3 to ?
Maybe show more details of the coil you used and how you connected it ?

Connection points for the VDI would be useful too, although not diffcult to work out a picture is always good, particularly for amateurs like me

[silverdog]

TX=0,587mH
RX=36,5mH

I picked up a Blue Max Shooter DD coil which I was hoping to use on this project
It arrived yesterday and initial measurements give the following

TX=0.54mH
RX=15.4mH

Should this be ok for the IDX Pro ?
Anyone have pin outs, I'm not sure about the shield and how best to connect to the pcb, I rather not cut the connector so will look to source a male 5 pin plug that will fit