Analogue-sequencer

At 12:24 PM 10/11/03 -0000, you wrote:

>Third, also for the clock-thing: I'm looking for a good start/stop 
>cirquit. Now I use a common push to make switch for stopping and 
>starting the machine, but the switch doesn't work right. For when I 
>start the machine, it runs, but mostly it stops immediatly. When I 
>hit the knob it's like the switch switches on and off really fast for 
>several times, and after that the machine runs, or not. 
>I hope you understand what I mean, and that someone is able to help 
>me.
>Cheers,
>Roel


Hi Roel,

Sounds to me like you need to "debounce" your momenatry switches.  There's
a bunch of ways to accomplish this, and searching google should turn up a
variety of options.  I typically run the switch contact through a series
capacitor (HPF), then to a pull-up or pull-down resistor (depending on if
your switch shorts to ground or V+).  Then I use schmitt trigger gates to
clean up the pulse.  

Hope this helps a bit... your project sounds interesting.  Any chance
you'll put a turntable-style pitch fader on there?  I would love to be able
to adjust the tempo of my equipment like that... and maybe a "push" and
"pull" button to nudge the beat forward and backwards to line it up with
another song, just as a dj would do.

Dave

Resonant Frequency:
resfreq@hoohahrecords.com
http://www.hoohahrecords.com/resfreq/index.html

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