At 06:32 AM 4/8/2011, you wrote:
> > I intend to supply it with a purely DC source. I'm going to take the po=
wer
> > straight from my +5 or +12 rail out of the computer's PSU, or a spare P=
SU I
> > have lying around. I love those PSUs. Lots of power, convenient=20
> voltage, can
> > be used for anything.
> > --
>Not sure if PSU supplies are that pure.  I see pure =3D $$$ and would
>suspect ripple on all the DC rails as most components can handle some
>ripple.
>
>But I think any ripple here would equal heat.

There is not much improvement to be had below 10% ripple. It's an RMS vs.
average thing, compounded by the dismal performance of Peltiers vs.
mechanical refrigeration at the best of times. See app notes for Peltiers.

>Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the rewar=
d"
speff@interlog.com             Info for manufacturers: http://www.trexon.co=
m
Embedded software/hardware/analog  Info for designers:  http://www.speff.co=
m



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