Published December 26, 2023 © CC BY

LM35 Temp Monitor with ATmega328 & OLED

LM35 sensor with ATmega328 and OLED for stable, real-time temperature monitoring, suitable for education and environmental applications.

AdvancedProtip5 hours424

Things used in this project

Hardware components

Microchip ATmega328P

Seeed Studio Grove - OLED Display 0.66" (SSD1306)- IIC - 3.3V/5V

Texas Instruments General Purpose Dual Op-Amp

Buzzer

Linear Regulator (7805)

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)

Solder Wire, Lead Free

Digilent Mastech MS8217 Autorange Digital Multimeter

Story

This project originated as part of a homework assignment, designed to create a practical and efficient temperature monitoring system using an LM35 sensor, ATmega328 microcontroller, LM358 amplifier, and SSD1306 OLED display. The goal was to build a system that not only served an educational purpose but also offered real-world applications. It demonstrates the integration of various electronic components to achieve a stable and precise temperature reading. While it was initially developed for academic purposes, the design and functionality make it an excellent tool for anyone interested in environmental monitoring or similar applications.

Sheet

This project, developed for a homework assignment, reflects specific requirements and choices guided by educational goals. The LM35 sensor was chosen for its simplicity and accuracy in temperature measurement. The ATmega328 microcontroller serves as an effective and accessible tool for processing sensor data, widely used in educational settings. The LM358 amplifier is utilized to ensure signal stability, crucial for precise readings. The addition of an SSD1306 OLED display allows for real-time temperature monitoring, enhancing the system's practicality. These components were selected to balance ease of use, affordability, and educational value, making the project suitable not only for academic purposes but also for anyone interested in basic temperature monitoring applications.

PCB

This project was developed as a homework assignment for the Biomedical Devices and Artificial Intelligence. The main objective was to read data from an analog sensor capable of generating values between -10mV and +10mV, using the ADC feature of a microcontroller. The LM35 temperature sensor and the ATmega328P microcontroller were employed. An LM358 operational amplifier was integrated as part of the project. The selection of these components was aimed at amplifying and filtering the sensor output before providing data to the microcontroller. The design was tailored to handle both positive and negative outcomes.