[sdiy] suggestions for foot control

[Roy J. Tellason]

On Friday 16 June 2006 08:45 am, Paul Perry wrote:
> Are you trying to foot control a pot that is already part of a circuit, or
> are you just looking for a foot controlled source of control voltage?
> If the latter, I advise making a led/ldr system with a shutter that cuts
> off the light gradually as your foot rocks. Because, that is the only kind
> that will not wear out. Or go noisy.

I would agree with this.  Look at what the organ manufacturers are doing when 
it comes to stuff like this -- that "expression pedal" is going to see a 
*LOT* of activity over time,  and most of what I've seen out there has eithr 
taken this approach or gone with a pot that varies a DC voltage that's 
heavily filtered to get rid of the noise.  Even those that carry the audio 
directly and use a high-quality sealed pot (often dual or 3-section units for 
the separate audio channels found in organs) will eventually wear enough to 
get noisy,  and I don't know that replacements are going to be all that easy 
to find these days.

-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
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