Russell McMahon wrote....

> You could consider trying the conductive silver paint sold for PCB track
> repair.
> There is a certain art in using this.
>
> It is generally NOT conductive when whet and relies on the nonconducting
> binder evaporating away and leaving the silver in contact. Once you have the
> knack it makes OK PCB tracks.
>
> May be incompatible with your rubber though ???
>

We use spray on nickel coating...
I spray a bit onto a card, then use a small paint brush to apply it
directly to the pad.

The trick is to leave the nickel to dry for 8 hours to reach min
resistivity, but will work in a membrane application within half an
hour since the scan is tolerant of a high-ish resistance.


_____________________________

Lance Allen
Technical Officer
Uni of Auckland
Psych Dept
New Zealand

www.psych.auckland.ac.nz

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