Re: -5V on IIgs

[Don Bruder <dakidd@sonic.net>]

In article <1173060644.090959.116950@p10g2000cwp.googlegroups.com>,
 "James Littlejohn" <narguthru@yahoo.com> wrote:

> OK, to recap. and make sure I have it straight, I have the following:
> 
> +12v
> -12v
> +5v
> ground
> 
> Can I use the 7905 between the -12v and ground output to achieve -5v?
> And efficient will this be with a .25A ? If my load is small or non
> existent does this still eat up alot of power in the 'standby' mode?

If you've got  "for real" -12V supply, yeah, the 7905 will work. But 
yes, it's going to eat some power. I'm not ambitious enough to do the 
math, so I can't say how much, but that extra 7 volts has to go 
somewhere, and the somewhere is "away in the form of heat".

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