The manual/(ON) position of the switch is allow you to manually force a stage to be High (requires the clock to be working - it is a dynamic process). The idea is you toggle it on and off to program in a pattern. The Loop/ON position then turns on the feedback loop, sending the last step back into the first step, so that the pattern can repeat.
Ken
Ken
--- In cgs_synth@yahoogroups.com, "neilbaldwin70" <neil.a.Baldwin@...> wrote:
>
> Hello all,
>
> I posted a similar question over on Muff's but I thought I'd try here too as there seems to be a great deal of knowledge (and Ken's attention!) on here :)
>
> Basically I'm trying to test my SWAMP build and am totally stumped by some features of the Comparator section so it's difficult to know for sure if it's working as intended.
>
> The confusion I'm having is with the Loop features of the Comparator. I think I understand the "Loop In" (jack), "Loop Enable" (jack) and Loop Enable (switch) but the "Manual Loop" bit I am struggling with the most.
>
> In the wiring notes it recommends wiring up a momentary switch, though it does also say to use a (ON)-OFF-ON. From what I understand, you can hold the Manual Loop switch in the (ON) position and the Comparator will loop for as long as you hold it (by routing stage 8 to pin 2 of the LM393) and will stop looping when you let go - though I do have another issue with this later.
>
> Question is: what is throwing the switch in the other direction meant to do - I mean apart from the literal explanation of 'it sends the +VE rail to pin 2 of the LM393' :) ?
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> Second issue: when Looping is enabled (via any means), eventually all the 8 stages of the comparator are held high and you get a constant voltage out of the Mix output (for example). Seems like all the bits of the shift register eventually become 1 whereas I assumed that the shift register would keep rotating?
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> Any help or hints much appreciated.
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> Thanks,
>
> Neil
>