digital thermometer using lm35

A digital thermometer is utilized for measuring room temperature. This project serves as a foundational exercise for beginners to comprehend the functions of various pins on the PIC16F877A microcontroller. The design incorporates the analog-to-digital conversion (ADC) capabilities of the PIC16F877A and employs seven-segment displays (SSDs) alongside the LM35 temperature sensor. Sensors are commonly employed for temperature measurement, and the LM35 series is recognized for its precision as an integrated circuit.

The digital thermometer circuit operates by taking temperature readings from the LM35 sensor, which outputs an analog voltage proportional to the temperature in degrees Celsius. The PIC16F877A microcontroller is programmed to read this analog voltage using its built-in ADC feature. The ADC converts the analog signal into a digital value that can be processed by the microcontroller.

In this design, the LM35 is connected to one of the ADC input pins of the PIC16F877A. The output voltage from the LM35 increases linearly with temperature, providing a direct relationship between the temperature and the voltage output. The microcontroller's ADC module is configured to sample this voltage and convert it to a digital value, which is then scaled to represent the actual temperature.

The processed digital temperature value is sent to the seven-segment display driver, which translates the digital output into a format suitable for visual representation on the SSDs. The microcontroller controls the SSDs by activating the appropriate segments to display the temperature reading in a user-friendly format.

This circuit exemplifies the integration of analog sensors with digital processing and display technologies, making it an ideal project for beginners in electronics. The use of the PIC16F877A microcontroller allows for further exploration into programming and interfacing with various electronic components, enhancing the learning experience.Digital thermometer is used for determining room temperature. It is basic project for beginners to understand functions of different pins of PIC16F877A.It is made by using analog-to-digital conversion(ADC) function in PIC16F877A & seven segment display(SSDs) using LM35 as temperature sensor.   Sensors are widely used for temperature measurement but LM35 series is  precision Integrated Circuit..

🔗 External reference