There is one other thing about the LM34 and LM35. You must have about a 1.2K resistor in series with the sensing lead, and the ADC pin needs to be bypass right at the chip with a .1ufd. Sid Weaver W4EKQ Port Richey, FL -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu