Rodrigo, the LM35 outputs 10mV/deg C where 0 deg C = 0mV, -1 deg = -10mV, +1 deg = +10mV, etc. So 667mV = 66.7 deg C. It really sounds like Nick is using an LM34 which would give 66.7 deg F... - Tom At 02:05 AM 7/25/01 -0400, Rodrigo Valladares P wrote: >Your sensors are ok, the temperature range is -55 to +150 centigrade >degrees, and the slope is 10.0 mV/Deg, starting at 0V = -55 deg: > >0V is -55 deg. >0.70V is 15 deg. >2.1V is 155 deg. > >this makes sense ? :) > >----- Mensaje original ----- >De: "Nick Veys" >Para: >Enviado: Martes 24 de Julio de 2001 10:40 PM >Asunto: [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 ------------------------------------------------------------------------ Tom Handley New Age Communications Since '75 before "New Age" and no one around here is waiting for UFOs ;-) -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu