[sdiy] 4017 sequencer

Ken Stone sasami at hotkey.net.au
Fri Dec 31 23:01:17 CET 2004


As already said, the pots interact with each other. More specifically - 
when one pot is set to zero, it shorts ALL steps to zero via the common CV
output. 

Ken

>Hi all,
>
>I've been working on a little 8 step CV sequencer project, and I'm getting
>odd results.
>
>Here is the schematic;
>http://www.wearerecords.com/temp/4017_8step.jpg
>
>As you can hopefully see(sorry for the bad schematic), I am attempting to
>use the reset and a 1P8T switch to chose how many steps are used.  Another
>switch SPDT, enables or disables the chip.
>
>After much trouble shooting, I've gotten rid of any errors that I could
>find, and still there is an issue.  S1 works when it's selected for 1-4
>steps, but jams on 5 when selected to run 5-8 steps.  When stuck at step 5,
>it seems that ALL of the pots effect the CV that is output.
>
>If anyone can help me, with the information that I've given, I would be very
>thankful.  It already makes a really fun 1-4 step sequencer, so I really
>want the whole project to work.
>
>Thanks!
>Pat
>
>
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au or sasami at cgs.synth.net
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>




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