Your "fuzzy" results sounds like the LM35 is not being loaded. The
app notes for it show a load resistor, anything from 200R to 10k,
and also RC or series R for capacitive loads (eg long cables). It's
got 0R1 impedance at 1mA o/p so it should have enough oomph
for the PIC's AD to read. More info here (303kB)

http://eewww.eng.ohio-state.edu/~passino/LM35.pdf

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