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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!destroyer!cs.ubc.ca!newsserver.sfu.ca!sfu.ca!gay
- From: gay@selkirk.sfu.ca (Ian D. Gay)
- Subject: Re: Temp sensor with PC interface?
- Message-ID: <gay.721935517@sfu.ca>
- Sender: news@sfu.ca
- Organization: Simon Fraser University, Burnaby, B.C., Canada
- References: <1992Nov10.074004.60602@cc.usu.edu> <1992Nov13.210241.22329@networx.com>
- Date: Mon, 16 Nov 1992 17:38:37 GMT
- Lines: 21
-
- mikel@networx.com (Mike Lempriere) writes:
-
- >Jay Cliburn (slh1y@cc.usu.edu) wrote:
- >: I originally wrote:
- >: >>> Can anyone recommend an ambient air temperature sensor which interfaces
- >: >>> to a PC? It doesn't need to be very sophisticated or super accurate, I
- >[stuff deleted]
- >: I left out an important piece of information from my original post -- the
- >: room(s) will be up to ~1000 feet from the computer. I believe this will drive
-
- >(National?, Fairchild?) LM34d chips (3 pin transistor pak) cost about $1.29
- >a piece. The are voltage controlling devices -- you read 0.01 volts per
- >degrees Fahrenheit eg. room temp. of 68 degrees = 0.68 volts.
-
- >With normal 4 conductor wire and a pair of resistors, you're in
- >business! All you need then, is an analogue-to-digital-convertor.
-
- A cheaper alternative might be just to connect a thermistor to the
- game port, if you can find the right thermistor. I would guess this
- will turn out less accurate than an adc.
-
-