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 Forum index » DIY Hardware and Software » Thomas Henry designs
Voltage for TH designs.
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acidblue



Joined: Jun 26, 2009
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PostPosted: Fri Oct 22, 2010 9:00 am    Post subject: Voltage for TH designs. Reply with quote  Mark this post and the followings unread
Can these designs run on +-12V? Or are they strictly +-15V?
Reason I ask is my local supplier has a great deal on a +-12V supply.
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Sound



Joined: Jun 06, 2006
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PostPosted: Fri Oct 22, 2010 9:45 am    Post subject: Re: Voltage for TH designs. Reply with quote  Mark this post and the followings unread
acidblue wrote:
Can these designs run on +-12V? Or are they strictly +-15V?
Reason I ask is my local supplier has a great deal on a +-12V supply.


Hello acid,
Yes in general they could work on +/-12V, just require little adjustments for work properly. But this is a very general question, you should specify which design are referring to.

Some examples:
SN Voice @ +/-12V
vca-1
vco-1

Think that adapt circuits require to know a little what you are doing. That is always good. But more complex circuits could need time.
An easy solution is to have two power supplies one +/-12V and another +/-15V.
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acidblue



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PostPosted: Fri Oct 22, 2010 11:27 am    Post subject: Re: Voltage for TH designs. Reply with quote  Mark this post and the followings unread
Quote:


Hello acid,
Yes in general they could work on +/-12V, just require little adjustments for work properly. But this is a very general question, you should specify which design are referring to.

.


These are the modules I'm interested in :
VCO-1, VCF-1, VCA-1
X-4060 and the XR-VCO
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Sound



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PostPosted: Fri Oct 22, 2010 1:20 pm    Post subject: Reply with quote  Mark this post and the followings unread
VCO-1, and VCA-1 you have the links above.

Looking at sschematics VCF I only see R21 that provides current reference. If for 15V is 100K, for 12V is 80K. So R21=80K.

Ill try look at the other schematics. By the way , this is theoretic, i didn't test it. I just look for voltage references, current references and offset and amplitude outputs.

If you will have a lot of modules at +/-15 V, you can look on ebay for "power one HBB15".
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acidblue



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PostPosted: Fri Oct 22, 2010 1:24 pm    Post subject: Reply with quote  Mark this post and the followings unread
Sound wrote:


If you will have a lot of modules at +/-15 V, look on ebay for "power one HBB15".


Been looking already, found a cheap Chinese one for about $17.
Just might get it and use 15V instead.
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