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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
+/- 9v wall wart for 2 in 1 soundlab
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numbernone



Joined: Aug 16, 2006
Posts: 477
Location: new york city
PostPosted: Fri Oct 06, 2006 8:11 am    Post subject: +/- 9v wall wart for 2 in 1 soundlab Reply with quote  Mark this post and the followings unread
Someone posted a link to a bipolar 9v wall wart some time ago, and as is most common I can no longer locate it. I would really prefer to use an external supply for my new 2 in 1 soundlab project, rather than the battery option. If anyone knows of this link or another available PSU, lay it on me baby!
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fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
PostPosted: Fri Oct 06, 2006 9:25 am    Post subject: Reply with quote  Mark this post and the followings unread
Quote:
Someone posted a link to a bipolar 9v wall wart some time ago, and as is most common I can no longer locate it.


i think it was me! BUT: i don't think a bipolar symmetric wall wart (+V/GND/-V) is common - i'm actually not sure if this is available at all. what i did was to build a small psu fed by an external 9V AC (500mA) wall wart transformer. here's the thread for the psu:

http://electro-music.com/forum/topic-12968.html

you can easily build it on a stripboard and use only the regulators for the +/-9V and leave the others off. you can draw about 100mA from this psu which should be enough for two SLs. actually only the transformer you'll need is a 9V AC wall wart.

cheers,
matthias
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