[sdiy] Voltage regulator weirdness

Peter Ullrich synpro at networld.at
Mon Aug 23 09:49:42 CEST 2004


Ciao
Peter

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                               Ing. Peter Ullrich   
	               Hardware & Software Developer  /  Electronic Musician
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Zitat von Sudhu Tewari <loopstick at hotmail.com>:

> Anyone have an idea why my little dual supply circuit is acting funny?
> 
> I split 30V into +/-15V using 78/7915 regulators. The 7915/neg side works 
> fine, but the positive supply drops from 15v to 13v after a few seconds of 
> power. I've disconnected almost all the filter caps which helped keep 15v 
> for a few more seconds, but it still drops to 13v.
> 
> Any ideas? IC aint getting hot, it's kinda heatsunk.... I'm baffled..
> 
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