How to use temperature sensor with Arduino Uno

The temperature sensor is the most popular measuring device which is capable of sensing the intensity of heat generated by the object to which it is connected. These sensors are most frequently used by us through our household devices such as microwaves, refrigerators, air conditioners, and so on. In this tutorial, we will learn about LM35 (LM means linear monolithic) temperature sensor which is an integrated circuit analog temperature sensor.

It is an easily available, less costly, and accurate result-providing sensor without external calibration or trimming. Its output voltage is linearly proportional with Centigrade temperature which is preferred over other temperature sensors calibrated in Kelvin in which extra additional calculation is needed to convert a measured temperature into centigrade.

LM35 is manufactured by Texas Instruments and is capable of measuring temperatures in the range of -55°C to +150°C. Its output voltage increases by 10 millivolts for every degree Celsius, an increment in temperature means its scaling factor is 10 millivolts per degree Celsius (10 mV/°C). For example, if the temperature being measured is 30°C, the LM35 output voltage will be 300 millivolts. LM 35 temperature sensor is an analog temperature sensor which means it provides output in analog signal form.

Some microcontrollers do not accept analog signals, therefore, they require additional circuitry like analog to digital converter (ADC) to convert the analog signal into digital.

In this tutorial, I will use Arduino Uno which has an inbuilt analog-to-digital converter. Arduino Uno has six analog input pins (A0 to A5). I will use one of these analog pins to convert the analog output of the LM35 sensor into the digital output.

In this tutorial, I will explain to you two projects. In the first project, you will understand, how a temperature sensor can be operated with Arduino Uno with the serial monitor.

In the second example, you will learn how to show the output temperature on LCD using Arduino Uno. I will show you how to calculate output temperature in Celsius as well as Fahrenheit in both projects.

How to use a Temperature sensor with Arduino Uno (with serial monitor):

In this example, I will show you how a temperature sensor can be operated with Arduino uno to generate output on a serial monitor. It will show the real-time measured temperature values in Celsius and Fahrenheit.

For more detail please visit:

https://arduinounomagic.com/how-to-use-temperature-sensor-with/

How to use a temperature sensor with Arduino Uno (With LCD):

In this example, you will learn how to display real-time temperature values in Celsius and Fahrenheit on the LCD screen.

For more detail please visit:

https://arduinounomagic.com/how-to-use-temperature-sensor-with/