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 Forum index » DIY Hardware and Software » Circuit Bending
DIY PSU for 9v machines
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themanthatwasused



Joined: Aug 17, 2011
Posts: 2
Location: Singapore

PostPosted: Sun Sep 04, 2011 1:24 am    Post subject:  DIY PSU for 9v machines
Subject description: Please help me on a recommendation for a simple PSU for 9v handmade instruments
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Hi, im still a relative newbie in this forum and on DIY instruments.
I am currently using two oscillators that my friend help me build.
As seen above, one is a Hex Schmitt trigger chip, and a NAND chip oscillator.

I want to make two more or another device plus my Roland TR626, which will all be powered by 9v. If I want to put them in one case, how do I make a simple and effective PSU for the 4 machines that are 9V.
I have built and bent simple objects before and can handle basic soldering so I can handle basic circuits for this.

Can anybody here recommend a simple way to do this?
Has anyone attempted the same project?

Thanks in advance.
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Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Sun Sep 04, 2011 6:15 am    Post subject: Reply with quote  Mark this post and the followings unread

One possible solution is the small bear electronics 9v ps kit - Here's a link

http://www.smallbearelec.com/Projects/SmWart/SmWart.htm


Good luck
Gary
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themanthatwasused



Joined: Aug 17, 2011
Posts: 2
Location: Singapore

PostPosted: Sun Sep 04, 2011 6:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

Mongo1 wrote:
One possible solution is the small bear electronics 9v ps kit - Here's a link

http://www.smallbearelec.com/Projects/SmWart/SmWart.htm


Good luck
Gary


Wow, looks simple enough for a novice like me.
Thank you so much sir!
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dylar



Joined: Apr 25, 2011
Posts: 51
Location: iowa

PostPosted: Sat Oct 15, 2011 10:57 pm    Post subject: Reply with quote  Mark this post and the followings unread

If it's just a DC 9V power supply you want, the easiest way is to grab a wall wart and solder the wires to a stripboard. Just create a bus.
There are plenty of designs for reducing any possible ripple in the signal if you want to get all hi-fi about it. But in my experience running several pedals off a bussed wall wart is a perfectly fine solution (in short, you're just making a daisy chain from a wall wart).
Building a power supply from scratch isn't really worth it (IMO) unless you need some sort of specialized supply, like a bipolar one.
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dylar



Joined: Apr 25, 2011
Posts: 51
Location: iowa

PostPosted: Sat Oct 15, 2011 11:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

also, if you want to filter the power supply but don't want to mess with wiring a transformer, couldn't you just build the filtering part of the Small Wart and solder the secondary of a wall wart to where the secondary of the transformer would go? Having a bit of extra filtering isn't going to hurt anything, right?
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corex



Joined: Mar 02, 2010
Posts: 112
Location: Las Vegas

PostPosted: Mon Oct 17, 2011 1:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

Using a wall-wart directly is easy, but I find that it's not much more difficult to use an LM7809 and regulate it (use a 12V wall wart, say.)

If you want to get fancy with regulation and filtering, the MFOS bipolar supplies are a good way to go: http://www.musicfromouterspace.com/analogsynth_new/WALLWARTSUPPLY/WALLWARTSUPPLY.php
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