[sdiy] Reed Switch and Magnet Keyboard

[Tim Parkhurst]

You might get a little extra 'breathing room' between the adjacent
magnets/switches by offsetting every other magnet and switch assy. In other
words, on one key the magnet and switch sits fairly close to the pivot
point; on the next key, the magnet and switch sit fairly far away from the
pivot point. One problem I see with this approach is that the switches
sitting close to the pivot point will tend to close slightly earlier than
the switches sitting further away. This might be such a minor timing
difference as to be unnoticeable, but (if needed) you might be able to
compensate by putting shims under the switches that sit further from the
pivot. This would raise them up slightly so that they would close earlier. 

Tim Servo
"Imagination is more important than knowledge." - Albert Einstein




> -----Original Message-----
> From: Ray Wilson [mailto:raywilson at comcast.net]
> Sent: Wednesday, December 10, 2003 5:11 AM
> To: Scott Stites
> Cc: Synth-Diy
> Subject: [sdiy] Reed Switch and Magnet Keyboard
> 
> Hi Scott (and list)
> 
> You mentioned that you had made a keyboard using reed switches and
magnets.
> I want to outfit a set of piano keys in this manner and am interested to
> know how you kept adjacent key switches from being activated together. I
> have a source for some nice inexpensive reed switches and magnets of
various
> sizes and would appreciate your suggestions (and anyone elses who wants to
> chime in).
> 
> Thanks



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