[sdiy] Triggering problems with sequencer. Any thoughts?

[Harry Bissell Jr]

The trigger should be generated from the edge of the clock that advances
  the counter...  
  
  Some designs have a trigger that is generated with a switch on each
  output, so you can choose to trigger, or not... on each step.
  
  Any of the above is fairly easy...
  
  H^) harry

mark verbos <mverbos at earthlink.net> wrote:  mult the trigger from the input?





Rykhaard D.A.M.I.A.N. wrote:
> Help! :(
> 
> I've successfully got my 4 steps working, with a single 12 position (1 
> octave) rotary switch on each step.
> 
> I'm now trying to derive a Gate or Trigger FROM each step when it 
> occurs.  The best I've been able to do, is get a Trigger out to one of 
> my envelope generators, when there's a larger than smaller transistion, 
> between voltages from the Control Voltage out summer.  (Summing all of 
> the rotary switch outputs to a single CV out, which itself is working 
> perfectly.)
> 
> As an example - say that I have the 4 notes set on the rotary switches to:
> 
> C1 (lowest pitch)
> C2 (highest pitch)
> E1 (2nd lowest pitch)
> B1 (2nd highest pitch)
> 
> I'm only getting Triggers, from the Highest and 2nd Highest pitch, due 
> to the difference in voltage out of the CV summer.
> 
> I've tried the following combinations on the comparator, that is setup 
> with the following resistor divider on it's negative input:
> 
> - +15V through 1M8 to negative input
> - Negative input through 15K to Ground
> 
> On the positive input of the comparator, I've tried:
> 
> - CV Out through 0.1uF to positive input; 1M to ground
> - CV Out through 0.1uF to positive input; 2M to ground
> - CV Out through 0.001uF to positive input; 1M to ground
> - CV Out through 0.01uF to positive input; 1M to ground
> - CV Out through 0.01uF to positive input; 200K to ground
> 
> Almost all of them gave me the above description.  The worst (0.1 / 1M) 
> gave me a Trigger on only the very highest voltage.
> 
> What can I do, to get a new trigger, from every single step?  (All steps 
> are coming from the 4051 1:8 multiplexer.)  Would I have to have a 
> separate 4051, generating a Gate/Trigger, each time?  (That's my 
> thoughts, now.  Which could be handy for more effects. :) )
> 
> Thanks for any help. :)  At least 1 wav file'll be up at my webpage, as 
> soon as I get a Gate or Trigger functioning properly. :)  (Then I'll get 
> the 2nd rotary for each step done as well, so that I can alternate 
> between each pair, on each step. :D )
> 
> -- 
> Take care,
> Warmth and Peace,
> Ryk
> 
> http://deathlehem.bravehost.com/damian.html - D.A.M.I.A.N.;s webpage - 
> Dec 2705 update


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