Re: [ATM] Electronics help needed - temperature control

[Dave Smith <smithersscope@yahoo.com>]

Hi Gil,
Don Clements designed a circuit to control a dew
heater for secondaries and finders and such. I can't
see any reason why it would not work for controlling a
fan. Power consumption or current might be an issue,
but I couldn't address that. Perhaps someone else
could?

Don's site:
http://mysite.verizon.net/res0owmd/id1.html

There's a link from Don's site to Ken Lowther's page
for a printed circuit board.

I've printed up and etched a 6-pack of those boards
and have wired my first one up. So far so good.

Dave

--- Gil McFarlane <gilboastro@yahoo.com> wrote:

> I am working on a way to control mirror temperature
> and want to have a cooling fan (12V) that turns on
> when temp is above a certain level (that I can set).
> 
> My son was working on this for me - but he had to go
> back to college!  (Kids now days.)  Does anyone have
> any suggestions?
> 
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