Date:         Tue, 5 Nov 2002 12:42:56 -0500
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Fridge fan, turbo version?
Comments: To: rodney.woten@LENNOXIND.COM
In-Reply-To:  <TFSUTDMT@lennoxind.com>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At one time I was playing with auxiliary fans/air flow to the back of the
fridge, and I found that adding fans made the temperature inside the box go
up instead of down -- so I left it with just a Fridge-Mate fan replacing
the original, and in the same location.  I'd sure be interested in any
temperature-vs-airflow data that people might have.

At 10:50 AM 11/5/2002, Rodney Woten wrote:
>  Another crazy thought I had was to install some kind of a rheostat in
> series with it to vary the speed.  Turn it up all the way on the hottest
> days, and down when I lay me down to sleep.  I just can't quite get the
> circuit right, though.  Anyone on the list know of a simple way to
> control the speed on a 12 VDC motor????

Try adding diodes in series with the + lead.  Each one will drop the
voltage half a volt or so.  You can wire them to a rotary switch once you
decide how many work for you.  Below about 6-7 volts I would expect the
motor to quit and/or run slowly backwards.

david


--
David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"