[sdiy] Accordion-style controller

[John Luciani]

On 2/11/07, Johannes Öberg <johannes.oberg at gmail.com> wrote:

> John Luciano wrote about opto-interrupters:
>
> I'll look into that, are they complete 'forks' where you just insert
> something between the, uh, what do you call them? Fork-pins?

A fork with two tines (a U). I believe you just refer to it as a slot.

> That method might provide a way to get 'pressure' sensitivity into the
> keyboard. A real accordion tends to bend and distort the tone (like a
> blues harmonica) when you hold the buttons very lightly.

Some opto's are on/off others are analog. To get the pressure you need
an analog slot interrupter and a method to vary the amount of light that
goes thru the slot as you change the pressure. The mechanism could get
quite complicated if you need a lot of switches.

My foot pedals are only on/off and the board is very simple.

(* jcl *)

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