Arduino Uno Projects

Maximize solar panel energy harvest with an intelligent single-axis sun tracker that pivots toward the brightest light source in real time.

Build a dual-threat hazard monitor that spots flames and gas leaks simultaneously using an Arduino, flame sensor, gas sensor, emergency relay exhaust, and loud audio alarm.

Build a smart parking lot gate with entry and exit ultrasonic sensors, a servo barrier arm, green and red traffic lights, an audio chime, and live slot tracking on an LCD.

Build an automatic plant watering system using an Arduino Uno, an analog soil moisture probe, an I2C LCD screen, and a relay-switched water pump with hysteresis control.

Build a precision digital scale using an Arduino, an HX711 24-bit load cell amplifier, a one-touch tare button, and live gram readouts on an I2C LCD screen.

Build an automated flood warning station using an Arduino, an ultrasonic sensor to track rising water levels, a 10-segment LED bar graph, and an emergency audio siren.

Build an energy-saving smart solar streetlight using an Arduino Uno, an LDR ambient light sensor, a PIR motion detector, and a relay-switched high-lumen street lamp.

Build a hygienic touchless trash bin using an Arduino Uno, an HC-SR04 ultrasonic sensor, and an SG90 micro servo that automatically opens when your hand approaches.

Build a simple countdown timer with an Arduino Uno, a single-digit 7-segment display, a push button, and a buzzer. Press the button to count from 9 down to 0, then hear a short finish alert when the countdown ends.

Build a small tilt alarm box with an Arduino Uno, a tilt switch, an LED, and a buzzer. The Arduino watches the tilt switch, confirms that the box has moved, then turns on both visual and sound alerts.

Build a beginner-friendly mini stopwatch with an Arduino Uno, two push buttons, and an LCD1602 display. One button starts and stops the timer, the other resets it, and the LCD shows elapsed seconds with a simple tenths-of-a-second display.

Build an Arduino heartbeat monitor with a pulse-style heart beat sensor, an LCD1602 display, and a buzzer. The Arduino watches the analog pulse signal, detects clean beat peaks, estimates BPM from the time between beats, and shows the live result on the LCD.