I built a Smart Display Sensor. This project combines my interest in tech with real-world usability. It’s designed to read and display a room’s temperature and light levels using multiple sensors and an LCD screen.

The components I used include an Arduino board, an LCD display, a temperature sensor, and an LDR (Light Dependent Resistor). The device takes real-time readings and updates the display every 5 seconds, alternating between Fahrenheit and Celsius for temperature. It also shows the current light level—whether the room is bright, dim, or dark.

When you plug in the USB, the LCD begins with a custom welcome message and a short boot-up sequence that says “Initializing...”—mimicking a real smart device. Then, it continuously reads data: the temperature sensor gives a Celsius value, which is converted into Fahrenheit using code, and both values are displayed in turn. The LDR detects ambient light levels. Depending on how much light is detected (based on numerical thresholds), the display shows whether the room is bright or dim.

In the code, I used library functions to manage the LCD and simplify commands. I broke the code into setup and loop sections. The setup configures the sensors and display, while the loop handles readings, conversions, and alternating messages.

This project can have many real-life uses—like turning on a light when it gets dark or activating a smart fan when the room gets too warm. It’s a great example of how sensors and code can make everyday life smarter and more responsive.