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cstate_singularity
Joined: Sep 30, 2013 Posts: 2 Location: California
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Posted: Mon Sep 30, 2013 3:39 pm Post subject:
Power Supply Design |
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I am looking at designing a synth based on some designs I found in a great book called Electronic Music Circuits published in 1982 by a gentlemen named Barry Klein. It has given me the most insight into my goals, which is surprising considering its age. Not surprisingly many of the chips that are mentioned in the book (SSM, CEM) are not available. I think I can get around that part of it but currently I am curious as far as how to solve the power issues.
Most of these designs and most other DIY synth circuits seem to use a +-15V bipolar supply. I'm not really interested in having a transformer reduce main level AC inside what should be a small box. I also need to get a 5V DC supply for the Arduino brain which will drive the synth by converting MIDI to CV. (My code is SO bad but it works!) I've also considered using an AC-AC adapter but that seems a bit dated and I want to use current techniques in my design.
Any tips or tricks that I can use to use something like a 9V DC input to power this setup? Am I way off? I still have a lot to learn, but if anyone could point me in the right direction I would be most appreciative! |
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24079 Location: The Netherlands, Enschede
Audio files: 278
G2 patch files: 320
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Posted: Mon Sep 30, 2013 3:44 pm Post subject:
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cstate_singularity
Don't know if you saw this one?
It's a nice one to get into power supplies a bit _________________ Jan
also .. could someone please turn down the thermostat a bit.
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24079 Location: The Netherlands, Enschede
Audio files: 278
G2 patch files: 320
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Posted: Mon Sep 30, 2013 3:48 pm Post subject:
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Oh, sorry - you dont want that ... a lot of circuits are indeed using a bipolar supply, its a bit messy to create that from from a single 9V, to DIY that is, but there are switching DC to DC converters which could do it for you. _________________ Jan
also .. could someone please turn down the thermostat a bit.
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cstate_singularity
Joined: Sep 30, 2013 Posts: 2 Location: California
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Posted: Mon Sep 30, 2013 3:55 pm Post subject:
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Thanks so much for the quick response and the welcome! I hadn't seen that one, it looks like a good resource and might be applicable to some of my future design goals.
I'm not set on a particular design, and I have seen some of the mess of converting common DC to bipolar. I guess I'm kind of wondering how does something like the Dave Smith Mopho, or the Shruthi-1 handle its power.
I'm gonna get to looking up the switching DC to DC converters you mentioned. I'm on a temporary assignment for work so I have tons of time for the next couple weeks. |
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L´Andratté
Joined: Sep 23, 2012 Posts: 150 Location: Hamburg, Germany
Audio files: 5
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Posted: Sun Dec 08, 2013 5:54 pm Post subject:
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Why not use 24VDC wallwart and convert to +12/-12?
Needs a voltage divider and buffer...
If you insist on 9VDC there are stuff like lt1054 chips, check out Diystompboxforum for details. |
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prgdeltablues
Joined: Sep 25, 2006 Posts: 222 Location: UK
Audio files: 12
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Posted: Mon Dec 09, 2013 2:29 am Post subject:
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If it will only draw a modest amount of power, you could use two 9V batteries in series, centre-tapped, to give you +/- 9V bipolar supply.
Peter |
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