Re: [ATM] low voltage heating elements.

[scott <srychnov@chem.ps.uci.edu>]

On Sep 7, 2004, at 11:08 AM, Don Clement wrote:
>
Don,

Could I use a modification of this circuit to control a fan used to 
cool the mirror?  I am thinking of active cooling with a "damp sponge" 
attached to the back of the mirror and a fan blowing over it.  I did 
some tests a while ago with a fan and digital thermometer, and the damp 
sponge approach cools mirrors very quickly but can overshoot--and thus 
dew out your primary.

Scott



> Here is low voltage DIY circuit that automatically keeps optics a small
> amount above ambient and minimizes wattage, battery life, and the 
> effect on
> seeing. http://mysite.verizon.net/res0owmd/id1.html Cost is about $10 
> in
> parts.
>

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