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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Gltchy WSG questions
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numbernone



Joined: Aug 16, 2006
Posts: 477
Location: new york city

PostPosted: Thu Sep 14, 2006 11:03 am    Post subject: Gltchy WSG questions Reply with quote  Mark this post and the followings unread

First shot at the WSG is completed (on radioshack perfboard, with point to point wiring no less). It makes some great noises so far, also it is obviously not functioning completely!!!

1. The filter pot is having no effect at all.
2. A few of the pots are only active in the last 20 degrees or so of rotation, muting its functionality in the other region of rotation.

I think this covers it, forgive me as I finished late late last night and didn't have much chance to do much beyond check most of the connections (all were fine). I intend to do some more in depth troubleshooting this evening and was hoping to go home armed with suggestions of where to look first.

Thanks,
matthew
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Wild Zebra



Joined: Apr 28, 2005
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PostPosted: Thu Sep 14, 2006 12:30 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
A few of the pots are only active in the last 20 degrees or so of rotation, muting its functionality in the other region of rotation.

I kinda think this might be typical, unless mine is not working right either. With mine depending how its set up sometimes some pots don't do much. But if I fiddle around all the pots will do something.

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opg



Joined: Mar 29, 2004
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PostPosted: Fri Sep 15, 2006 6:41 am    Post subject: Reply with quote  Mark this post and the followings unread

Yes, I too have one knob with that 20-degree rotation deal- kind of. I found that it actually works the full range, but it seems to be exponential. I can't remember which does which (Wacky, Zany, etc), but it's the one that can only be used when flipping the toggle switch. The intervals you can adjust with that feature can be set SOOOOOOO slowly because of its exponential setup.
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Joel



Joined: Sep 12, 2006
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PostPosted: Fri Sep 15, 2006 7:08 am    Post subject: Reply with quote  Mark this post and the followings unread

so it's a log instead of a lin pot?
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opg



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PostPosted: Fri Sep 15, 2006 10:43 am    Post subject: Reply with quote  Mark this post and the followings unread

Joel wrote:
so it's a log instead of a lin pot?


No, that's the weird thing. I'd have to look at the schematics again to see where the pinouts of that IC are going.

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fonik



Joined: Jun 07, 2006
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PostPosted: Fri Sep 15, 2006 11:37 am    Post subject: Reply with quote  Mark this post and the followings unread

i don't know nothing about this particular problem, neither took a look at the schematics but if you have problems with pots (not working fullrange or lin instead of expo or vice versa) the following article from mister laurie biddulph about tailoring pots will help (i found it very informative anyway):

http://www.elby-designs.com/documents/tailoringpotentionometers.pdf

cheers,
matthias
http://www.modular.fonik.de
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Wild Zebra



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PostPosted: Fri Sep 15, 2006 12:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

I not sure what my pots were as I scrounged them from some non working stuff. Oh well it sounds cool anyway
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Joel



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PostPosted: Fri Sep 15, 2006 12:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wild Zebra wrote:
Oh well it sounds cool anyway


That's the main thing Smile
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Uncle Krunkus
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PostPosted: Sat Sep 16, 2006 7:03 am    Post subject: Reply with quote  Mark this post and the followings unread

Next to the value there will be a letter: -
A is Log
B is Linear
C is Antilog, (and if you ever find one of these you've probably been teleported into an episode of the Twilight Zone! Laughing Rare as hens teeth)

B used to be Log, and A used to be Linear, but they swapped them around so there would be less confusion Rolling Eyes
BTW if the letter is missing, a linear pot will read half it's overall resistance when turned half way. A log pot will be no where near it.

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