[sdiy] replacing step incrementor/decrementor with continuous pot

[Happy Harry]

If that is true, a retriggerable one shot will kill any pulses
faster than you want to allow.

I think most scanning software can run pretty fast, you need less than
5mS to eliminate key bounce.

H^) harry


>From: Christian Hofmann <chris at scp.de>
>To: synth-diy at node12b53.a2000.nl
>Subject: Re: [sdiy] replacing step incrementor/decrementor with continuous 
>pot
>Date: Tue, 20 Mar 2001 18:51:10 +0100
>
>
>On Tue, 20 Mar 2001 17:07:51 +0000
>Emmanuel AMADIO <emmanuel at postimpressions.co.uk> wrote:
>
> > Shouldn't be to hard using a rotary encoder with a bit of logic to 
>recreate
> > the up and down from the increment/decrement
> > or whatever of the rotary encoder.
> > Basically the rotary encoder has 3 digital output which varies in gray 
>code I
> > think, so you can determine if you
> > increment or decrement or don't change using probably only logic gates.
>
>Hi,
>basically this may be possible - but it might not work as expected,
>because the key panel scanning software's debouncing method may be
>confused by pulses arriving faster than a normal human operator can
>generate.
>Debouncing is kind of a logical low pass filter, and it probably is
>designed to reject fast bouncing spikes, but pass through repeated
>button depressions.
>Hard to say what will be the maximum rate for the encoder generated
>pulses that will be accepted.
>
>regards
>Christian

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