STEM In Action: The Universal Thermometer

 Temperature is everywhere — in the classroom, in the kitchen, and in the lab — but converting between Celsius, Fahrenheit, and Kelvin can sometimes be confusing. To make those conversions instant and visible, Grade 6 students of Mayoor Private School - Ryan Veera Kumar, Vasudev Subhash, Jared Aneesh Grigary -  designed The Universal Thermometer, a compact Arduino-based device that measures temperature and displays it simultaneously in °C, °F and K.

Using a DS18B20 temperature sensor connected to an Arduino and an I²C LCD, the students programmed the system to read ambient temperature in Celsius, calculate the equivalent Fahrenheit and Kelvin values, and show all three readings on the LCD screen. The result is a handy, real-world tool for quick classroom demonstrations, experiments, and everyday curiosity — for example, converting 30°C to Fahrenheit at the press of a button.

The project also highlighted how closely temperature ties into mathematics. The team used simple algebraic formulas for unit conversions and saw how higher-level math models explain temperature behavior over time. Key formulas used in the device include:

  • F = C × 1.8 + 32

  • C = (F − 32) × 0.5

  • K = C + 273.15

They also explored advanced concepts such as Newton’s Law of Cooling and the heat equation to understand how temperature changes in time and space — connecting classroom theory to practical measurement.

Reflecting on the project, the students shared:

 “Building the Universal Thermometer turned formulas from the board into numbers we could see every second. Watching the LCD update in three different units showed us how math, electronics, and programming work together.”

The Universal Thermometer is a perfect example of hands-on STEM learning: it combines problem-solving, coding, and measurement in a simple build that has real classroom utility. By taking a mathematical idea and making it tangible, Mayoor’s young innovators learned how technology can turn abstract concepts into everyday tools.




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