[sdiy] optical retrofit for minis?

[Kevin Lightner]

>  >
>>  Here's the situation:
>>
>>  Minimoog keyboard actions are dying left and right.
>>  More and more frequently, the plating on the contact springs and
>>  bussbars are wearing through, springs stretched, buss bars bent and
>>  the rubber standoffs on the contact board hardening. I have several
>>  minis here, all with restored electronics, but with bad keyboards.
>>  The clients are looking into options (buying another mini for parts,
>>  MIDI, etc.)
>>
>
>Kevin,
>
>how about magnets/reed switches?  I used these to MIDI an old organ 
>pedalboard.  I'm not sure how fast and even the response would be, 
>but it's worth checking out.  The install is pretty easy and 
>requires no change to the keyboard electronics.
>I'ts been a while, but I'd guess it would only cost a couple of 
>dollars/key (2 reed switches + magnet).
>
>  David


This was my first idea, but it requires 44 magnets to be placed on 
the key mechanisms and with precise placement.
Hall effect sensors are *really* expensive too, compared to the 
opto-interruptors.
Thanks though :))


-- 
Regards,
Kevin Lightner

Myself: http://www.synthfool.com
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