[Coco] Adding a CoCo 2 Case Fan

[theother_bob]

On my CC3 Portable I made sure to get a low power 12vdc fan (rated less than 100mA @ 12vdc) and tapped power from the 8v regulator (I think the final current draw was around 42mA @ 8vdc, and whisper quiet.)

Physically this was a large CPU fan from a P4 cooler. I had room to use it because I had already removed the internal power transformer. I cut extra slots for exhaust and mounted it diagonally in the corner with ducts to keep the exhaust from blowing back in.

Bob

----- Original Message ----
From: Chad H <chadbh74 at hotmail.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Friday, April 18, 2008 12:29:12 AM
Subject: [Coco] Adding a CoCo 2 Case Fan

I was wondering how those of you who have installed cooling fans in your
original CoCo cases have done this.  Where did you draw the power?  Using a
multimeter I measured the A/C transformer output at approximately 18VAC, not
a common type for fans.  I'm considering doing one more mod to my CoCo by
taking a 40mm fan and placing it just inside the left side of the case,
receded out of site, and blowing right over the heat sink that seems to be
the hottest thing in the case.  Since I couldn't determine a power source
safe to use off of the CoCo motherboard, I'm considering taking a small A/C
to 12VDC board and mounting it inside the case and running the A/C inputs to
a switch by the fan and the same A/C input leads used by the CoCo
transformer.



I would like very much to hear the ideas other have come up with on this.



-          Chad




--
Coco mailing list
Coco at maltedmedia.com
http://five.pairlist.net/mailman/listinfo/coco


      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ