The pin out of LM35 is shown in the figure below. LM35 can be operated from a 5V supply and the stand by current is less than 60uA. The voltage output of the LM35 increases 10mV per degree Celsius rise in temperature. It can measure temperature from -55 degree celsius to +150 degree celsius. LM35 is an analog, linear temperature sensor whose output voltage varies linearly with change in temperature. LM35 is three terminal linear temperature sensor from National semiconductors. Once we successfully interface arduino and lm35, we will go on to build a temperature display using arduino and a 16×2 LCD module which constantly monitors temperature around the measurement field/range of LM35 and displays the same on LCD module. In this article, we are presenting a tutorial on how to interface LM35 and Arduino along with its program.
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