vcnoiz clock in problem

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GNE
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vcnoiz clock in problem

Post by GNE » Tue Dec 03, 2013 8:46 pm

I didnt know there was a sub forum for Hexinverter.

I originally posted in euro

viewtopic.php?t=98814

Depending on what type of CV I use, the clock in will make the vcnoiz go dead [ even with all cables removed ] and requires a power shutdown / restart to work again.

I only got 2 responses in Euro forum.
1 user was getting the same results, another not.

Anyone else?

I bought this used from the forum, not the kit. Is this a difficult fix. [ or is this normal behavior ]

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hexinverter
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Post by hexinverter » Tue Dec 03, 2013 10:10 pm

Sorry to hear it's giving you troubles! I've not experienced this with my vcNOIZes but then again I tend to clock it at fairly fast speeds with square signals. What shape and frequency of clock signals are you experiencing this with?

The clock input does not have hysteresis on the input comparator so this means that it is expecting fast-ish (ie: sequencer rates at slowest) SQUARE WAVE signals. If you use a sloped/ramping/triangle/whatever at a slow frequency it may cause the clock input to begin oscillating as the input signal slowly ramps up, and lock up.

If I ever revise the design I will change it to play happier with odd shaped clock signals, but the design was made with square wave signals in mind so it's something I didn't think of adding at the time! :waah: :sadbanana: I will most certainly change it if I do another run of them in the future! Thanks for bringing this up!!!
Hexinverter Électronique
em: stacy[at]hexinverter.net

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GNE
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Post by GNE » Wed Dec 04, 2013 8:11 am

Hi

I guess I should have read the manual more carefully.
It does work perfectly with a SQUARE WAVE.
I didn't understand that it was not designed to accept other CV types.

Thank you for taking the time to answer my question even though I bought it used. [ I did buy a new Jupitor Storm ]

Both VCnoiz and Jupitor Storm are excellent modules.

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hexinverter
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Post by hexinverter » Wed Dec 04, 2013 12:32 pm

GNE wrote:Hi

I guess I should have read the manual more carefully.
It does work perfectly with a SQUARE WAVE.
I didn't understand that it was not designed to accept other CV types.

Thank you for taking the time to answer my question even though I bought it used. [ I did buy a new Jupitor Storm ]

Both VCnoiz and Jupitor Storm are excellent modules.
Hey again!

Well, in truth I should have thought that people would likely want to use more unconventional shaped signals for clocking it (it is modular land after all!) but it totally slipped my mind. So thank you for bringing it up. :tu: Now I will implement it in the future should I update the design! :cloud:

Glad to hear that you are enjoying the modules nonetheless! :yay:
Hexinverter Électronique
em: stacy[at]hexinverter.net

peripatitis

Post by peripatitis » Sun Jan 05, 2014 6:53 am

I am going to buy a vcnoiz soon, it looks like a great module,
congrats :tu:

So i was wondering,
is this only an issue of waveshape or is it also about the speed of the clock ?
Would a square lfo for example cause the module to behave weird ?

Any idea when a revised version will be ready ?

and merry christmas btw :)

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hexinverter
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Post by hexinverter » Sun Jan 05, 2014 10:06 pm

peripatitis wrote:I am going to buy a vcnoiz soon, it looks like a great module,
congrats :tu:

So i was wondering,
is this only an issue of waveshape or is it also about the speed of the clock ?
Would a square lfo for example cause the module to behave weird ?

Any idea when a revised version will be ready ?

and merry christmas btw :)
Hiya! :)

Hopefully this doesn't further confuse the issue at hand: but, it's neither, but kind of both! It's actually an issue with the rate at which the voltage excursion from LOW to HIGH happens. So, square waves are fine because they jump very quickly from LOW to HIGH on the rising edge.

FAST triangles/other weird shapes should be just fine. But slow shapes that are not square will result in a slowly rising edge, and then it might cause it to behave funny.

A square LFO should be just fine in other words! Then you can get random gates out of the module.

I have no idea when/if a revision will be right now. Sorry! :sadbanana:

And, Happy Holidays to you too! :) Here's my greeting card:

Image
Hexinverter Électronique
em: stacy[at]hexinverter.net

peripatitis

Post by peripatitis » Tue Jan 07, 2014 10:48 am

Cool now i got it :tu:


haha, great greetings card !

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