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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.mira.net.au!pumpkin.pangea.ca!www.nntp.primenet.com!nntp.primenet.com!news.sgi.com!howland.erols.net!vixen.cso.uiuc.edu!uwm.edu!alpha1.csd.uwm.edu!bacon From: bacon@alpha1.csd.uwm.edu (Jason Wayne Bacon) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Interfacing sensors to FreeBSD Date: 30 Nov 1996 20:33:47 GMT Organization: University of Wisconsin - Milwaukee Lines: 20 Message-ID: <57q5nb$k8p@uwm.edu> References: <57pos2$2ae@uriah.heep.sax.de> Reply-To: bacon@alpha1.csd.uwm.edu NNTP-Posting-Host: 129.89.169.1 Originator: bacon@alpha1.csd.uwm.edu From article <57pos2$2ae@uriah.heep.sax.de>, by j@uriah.heep.sax.de (J Wunsch): > robert@nanguo.chalmers.com.au (Robert Chalmers) wrote: > >> Does anyone know how to go about interfacing a temperature sensor to >> a FreeBSD box, so that I can get a temperature readout displayed? > > You need some form of an A/D converter. The thing that comes closest > to such a task in the PC environment is the game port, but it can only > convert resistivity, and its interface inside the machine is fairly > ugly (no interrupts possible, and you're responsible to measure the > pulse time yourself). There are ADC's available that plug into a parallel port. That would probably be the simplest solution for Unix, since the bus card ADC's usually only come with DOS/Windows drivers. There are all kinds of sensors you can attach to the analog end. Don't ask me where to buy them in Australia, though. :-) -Jason