Yeah, it is the same one I was using (just today I put the circuit together)
and was getting out 10mV/degree, and the negative temperatures are taken
care of with negative voltage.  You don't have to scale anything, so I think
there must be something wrong.  But I have noticed that, in general, it
seems to read a little on the hot side.  I was getting about 80 F and it
didn't feel that warm in the office =)

But I don't think it should be THAT far out, like 70 C!

I just put an RC filter on the output pin, and I'm powering it from +5V to
GND.  I can't really say what the problem might be.  Maybe your output
circuit (or voltmeter) is loading the chip?

- Wade
----- Original Message -----
From: "Nick Veys" <nick@VEYS.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, July 25, 2001 6:20 AM
Subject: Re: [EE]: LM35 Woes


> I'm using the "Basic Centigrade Temperature Sensor".  It's output is 0mV
> + 10mV/C, and it's extremely simple, just power and ground, and output.
>
> nick@veys.com | www.veys.com/nick
>
>
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Wade Carpenter
> > Sent: Tuesday, July 24, 2001 11:41 PM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: Re: [EE]: LM35 Woes
> >
> >
> > Hi Nick,
> >
> > I think if you refer to the app. notes in the data sheet, it
> > will give you a suggested circuit to use the device in it's
> > proper operating mode; this may be the problem.  I am using
> > the LM34 (Farenheit sensor) and it works quite well.
> >
> > Hope that helps.
> >
> > - Wade
> >
> > ----- Original Message -----
> > From: "Nick Veys" <nick@VEYS.COM>
> > To: <PICLIST@MITVMA.MIT.EDU>
> > Sent: Tuesday, July 24, 2001 7:40 PM
> > Subject: [EE]: LM35 Woes
> >
> >
> > > Greetings :)  I'm having trouble with some LM35 Centigrade
> > temperature
> > > sensors... I'm simply trying to read them w/a multimeter
> > and getting
> > > annoying values.  The Vss and Gnd are 5.12 and 0 respectively, and
> > > when I go to read the Vout, I get between .667 - .733 V.
> > Meaning my
> > > room is a toasty 66.7-73.3C.  Quite warm!  This is happening with 3
> > > separate sensors!  Not sure what my problem is...  Any
> > tips?  Perhaps
> > > I'm reading this totally wrong?
> > >
> > > nick@veys.com | www.veys.com/nick
> > >
> > > --
> > > http://www.piclist.com#nomail Going offline? Don't
> > AutoReply us! email
> > > listserv@mitvma.mit.edu with SET PICList DIGEST in the body
> > >
> > >
> >
> > --
> > http://www.piclist.com hint: To leave the PICList
> mailto:piclist-unsubscribe-request@mitvma.mit.edu
>
> --
> http://www.piclist.com hint: To leave the PICList
> mailto:piclist-unsubscribe-request@mitvma.mit.edu
>
>

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu