This project describes in detail how to use a LM35 temperature sensor to measure the surrounding temperature and display on a LCD screen by interfacing with a PIC microcontrolller. The LM35 sensor gives an analog output voltage that is proportional to the temperature. The output from the sensor is converted to a 10-bit digital number by the internal ADC of PIC16F688 micro. This project provides every details of software and hardware design involved.
Measuring temperature using LM35 Sensor – [Link]