LM35 is a temperature sensor that can measure the temperature in the range of -55 ° C to 150 ° C. It is a 3-terminal device that provides an analog voltage proportional to temperature. The higher the temperature, the higher the output voltage.
Analog output voltage can be converted to digital form using ADC so that a microcontroller can process it. For more information on LM35 and how to use it, see the topic LM35 Temperature Sensor in the Sensors and Modules section.