V G wrote:
>> PWM will be fine..
>
> Out of curiosity, why do you say that?

The guy who said this isn't a expert like Eric Clapton at guitar playing, s=
o
here's a good case for assuming the advice is stupid until proven otherwise=
..

Using PWM in your situation makes no sense.  You have already said you don'=
t
care about efficiency (although I'm not convinced yet you understand the
full implications including getting rid of much extra heat).  PWM is just
another form of full-on / full-off control, which Peltiers will be
inefficient at.  If you're going to do that, then you might as well use a
simple thermostat switch.  That will result in the same inefficiency but be
a lot simpler and easier to build.  You said this is for keeping your drink
cold, so a few degrees fluctuation is going to be fine.  After all, that's
how your refridgerator works too.

So in short, using PWM for this application is a dumb idea.


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