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From: sewilco@meccts.UUCP
Newsgroups: comp.misc
Subject: Re: Computer Thermometer
Message-ID: <2423@meccts.MECC.COM>
Date: Thu, 2-Apr-87 15:15:24 EST
Article-I.D.: meccts.2423
Posted: Thu Apr  2 15:15:24 1987
Date-Received: Sat, 4-Apr-87 18:37:12 EST
References: <128@dvm.UUCP> <1676@kitty.UUCP>
Reply-To: sewilco@meccts.UUCP (Scot E. Wilcoxon)
Organization: MECC Technical Services, St. Paul, MN
Lines: 20
Keywords: Thermometer, Instrument, RS-232
Summary: Hardware or computer store may have attic fan thermostat.

In article <128@dvm.UUCP>, frank@dvm.UUCP (Frank Wortner) writes:
> in a computer room.  Once the thermometer indicates a temperature above a
> safe maximum, the computer it was connected to could shut down itself and

I used the switch from an attic fan.  A surplus store in town has dozens of
them, each labeled with the temperature at which it closes the
circuit.  They look like squat cylinders with two wires coming out.
I confirmed the 85 degree label with a plastic bag, a glass ofhot
water, and a good thermometer.

In my case, I used the mouse switch port on an Apple Lisa.  Larry
Lippman already described how to use modem control lines for the same
purpose.  If you don't have a spare serial port, consider using the
modem control lines on a direct-connect console, printer, or other
device which doesn't use those lines.
-- 
Scot E. Wilcoxon   (guest account)  {ihnp4,amdahl,dayton}!meccts!sewilco
(612)825-2607           sewilco@MECC.COM            ihnp4!meccts!sewilco
	It may be the event of the century, but
	"Supernova 1987A" isn't a good catchword.