Sensing the temperature using Arduino with the LM35 sensor

In this recipe, we will learn how to sense temperature using the LM35 sensor connected to the Arduino board and will display the temperature in Celsius and Fahrenheit.

Getting ready...

For this recipe, we will require the following three components: a breadboard, Arduino Uno R3, and an LM35 sensor.

The LM35 is a temperature sensor that produces an output voltage that is linearly proportional to centigrade temperature. It does not require any external calibration or trimming to provide an accurate temperature. It has three terminals, Vs, Vout, and Ground, as shown in the following diagram:

Figure 5.12

We will connect the LM35 sensor to the Arduino board as...