Digital Thermometer Using Arduino and LM35 Sensor

Digital Thermometer Using Arduino and LM35 Sensor

Temperature measurement is fundamental in electronics and numerous real-world applications. This project demonstrates sensor interfacing by building a digital thermometer using the popular LM35 precision temperature sensor. The LM35 outputs an analog voltage linearly proportional to temperature (10mV per °C). The Arduino reads this analog signal through its ADC, converts it to temperature in Celsius and Fahrenheit, and displays the result on a 16x2 LCD screen.

Components

Arduino Uno
LM35 Temperature Sensor
16x2 LCD
10K Potentiometer
Breadboard

Components	Hexkart	Flipkart
Arduino Uno	Buy Now	Buy Now
LM35 Temperature Sensor	Buy Now	Buy Now
16x2 LCD	Buy Now	Buy Now
10K Potentiometer	Buy Now	Buy Now
Breadboard	Buy Now	Buy Now

Arduino

Arduino is an open source electronic prototyping platform.Arduino board designs use a variety of microprocessors and controllers. The boards are equipped with sets of digital and analog input/output (I/O) pins that may be interfaced to various expansion boards ('shields') or breadboards (for prototyping) and other circuits. The boards feature serial communications interfaces, including Universal Serial Bus (USB) on some models, which are also used for loading programs. The microcontrollers can be programmed using the C and C++ programming languages, using a standard API which is also known as the Arduino language, inspired by the Processing language and used with a modified version of the Processing IDE.

LM35 Temperature Sensor

The LM35 is a precision integrated-circuit temperature sensor whose output voltage is linearly proportional to the Celsius temperature. It provides a typical accuracy of ±0.5°C at room temperature and ±0.75°C over a full -55°C to +150°C range. The sensor outputs 10mV per degree Celsius, making it extremely easy to read with Arduino's analog-to-digital converter. It requires no external calibration or trimming and can be powered from a single 5V supply.