[sdiy] velocity-sensitivity for footpedals ?

[Happy Harry]

Yeah it is easy.... you take the rate of change of the voltage
from the pedal... and send that out as a voltage... the hard part
is determining WHEN to sample/hold that voltage if thats what you want to 
do.

Easiest way is to choose the limit of pedal rotation (like volts = max, or 
min) and trigger the S/H.

Alternate way is to hook up a piezo sensor and sense the impact, or
two phototransistors and measure the time a mask takes to shadow both
cells.

H^) harry


>From: Mountain Man <mtman at cloud9.net>
>To: synth-diy <synth-diy at node12b53.a2000.nl>
>Subject: [sdiy] velocity-sensitivity for footpedals ?
>Date: Mon, 07 May 2001 06:15:05 -0400
>
>I'm considering for a future project converting a set of organ pedals to
>midi.  I'm wondering how I'd add velocity sensing to such a set-up.  Is
>this something that can be accomplished with readily-obtainable parts?
>
>Thanks,
>Elby
>

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