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 Forum index » DIY Hardware and Software » Developers' Corner
problems with sequencer not triggering !!
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thepaddiscuile



Joined: Jul 11, 2007
Posts: 28
Location: ireland

PostPosted: Tue Oct 04, 2011 3:24 pm    Post subject: problems with sequencer not triggering !! Reply with quote  Mark this post and the followings unread

Yo..... I was wondering if somebody can figure this out..

I just breadboarded a 4017 based sequencer and wired it up as basic as possible to start on..

Just wired up a l.f.o for a trigger and using 4 steps to test..

OK cool I hear you say..Now state you're business ;]

OK so I have the 4 steps sequentially connected to l.e.ds for visual representation, and then 4 clock outs all tied to the same point using steering diodes to obtain 1 gate out..then the 5th step is tied back to reset.

Now this in my head is super easy but that's not the result.. I tested the trigger out on my synth envelope gen, but only receive 1 note on and 3 off. Now if I disable the last 3 steps and just take the first one it will trigger every time, Then as soon as I add another step it skips.????

I triple checked my wiring, all simple stuff, I even set up a different lfo just to make sure it was a 50/50 square wave generating clocks..

Didn't make a diffy..

I'm Baffled ?
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thepaddiscuile



Joined: Jul 11, 2007
Posts: 28
Location: ireland

PostPosted: Tue Oct 04, 2011 3:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Forgot to mention..

I haven't buffered the gate outputs yet because M stuck for space on Bread board. Doubt this should matter much yet but then again !!
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thepaddiscuile



Joined: Jul 11, 2007
Posts: 28
Location: ireland

PostPosted: Tue Oct 04, 2011 6:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

My Bad... solved it I think, I needed to put in a couple of nand gates and didn't spot it on the schematic I was looking at.

Laughing
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