[sdiy] Rubber contact keyboards

[Ken Stone]

>I've been hunting around for something like this to fix the appallingly 
>unreliable keyboards on the Korg Poly6/Poly61. The commonest fault on 
>broken Polysixes (which for some reason I seem to be a magnet for) is 
>dead keys on the cheap plastic keyboard, followed by the famous memory 
>backup battery leakage problem.

which of course was exactly why the one I obtained wouldn't work. I fixed
most of the rubber keys by inserting a short length of "dripper feed" tube
in the opening in the top of the rubber. It was a perfect fit. The remaining
failures, all grouped together due to a single strip being beyond help was
fixed by putting reed switches on the PCB and attaching magnets to the keys,
using, if I recall correctly, exactly the same tubing to attach the magnets
to the keys.

Ken
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>