[sdiy] Varying gate lengths (using a 4017 counter) for a simple sequencer?

[Dave Magnuson]

Tom G from EFM did something along these lines with his Seq2A.  Schematic 
is available on his site:
http://www.ele4music.com/pdfs/seq2a.pdf

You'll see the gate out with gate length near the bottom right corner of 
the schematic.

Hope this helps

Dave





At 11:07 AM 7/30/04, Julian wrote:

>Hi there,
>
>I'm messing with a 4017 decade counter, as a simple sequencer.
>
>Is there a simple way to take the regularly spaced outputs (gates) from
>this, and vary the length of them - i.e.. both make them shorter then they
>actually are, and longer then they actually are?
>
>
>Basically what I'm thinking is a simple sequencer, like the one mentioned in
>the 'simple sequencer' thread earlier, but with control over the gate times
>too.
>
>Ken stone's project using this chip offers a solution using switches to swap
>between the gate signal and a set, shorter, pulse, but what id really like
>is a completely variable time that can also be different for each step,
>ideally being able to even have overlapping gates (i.e.. longer then one
>clock cycle) although, i guess this isn't nearly as important as being able
>to shorten the gate individually for each step.
>
>
>So, any suggestions? (in relativly novice terms please - im still quite near
>the bottom of the curve ;)
>
>Thank you,
>
>Julian
>
>
>
>
>
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