TDI project

[usefi5961]

Hello everyone:I am looking for schematic of TDI metal detector.
does anyone have schematic and DD coil information of white's TDI metal detector?
Thanks

[kt315]

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[usefi5961]

Hi kt315,Thank you very much for reply,does a information about making DD search coils?and does a schematic is correct ?do you have pcb file?schematic is very close to gs4.4 sample .
thanks.

[kt315]

hello amigo
this is a product by Eric Foster and Carl. because you see a convergence to GS4. but my word here is last so let Carl to tell you more.

[Carl-NC]

GS4 --> GS5 --> TDI --> TDI-SL

I did the TDI-SL, not the TDI. They are all very similar.

[usefi5961]

Thanks,dear Carl,do you have schematic and DD coil instruction?do you doing reverse engineering this detector?

[Carl-NC]

The schematic kt315 posted looks correct. For the DD coil I would use

TX = 300uH 2Ω
RX = 300uH 2Ω-10Ω

[usefi5961]

The schematic kt315 posted looks correct. For the DD coil I would use

TX = 300uH 2Ω
RX = 300uH 2Ω-10Ω

Thank you very much