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Help with a Power Supply

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olivergw

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Hi, i was wondering whether any has any links or knows how i can make a dual rail power supply, it needs to be +15 - 0 - -15, and give out 100ma, it needs to be a rocky steady output as well, hopefully some one can help thanks

Oli :)
 
The chips you probably want to use are the 78xx (positive regulator), and the 79xx(negative regulator), along with a cheap transformer, some diodes and some capacitors.

Just google for "7815 7915", or "7812 7912" for 12Volt versions of the circuit. Alternatively go to www.national.com - one of the companies that makes the chip and look for the data sheets.

James
 
Here's a link for building a power supply
**broken link removed**
but it also insludes +5v and the power rails are 12v/15v depending on how you set it up

alternativly if you can get +/- supply greater than 15v you could use lm317

like this

**broken link removed**
 
I hate webpages that use ASCII schematics!:mad:
 
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