Touch-Based Doorbell using Arduino and Touch Sensor

The Touch-Based Doorbell is a smart and hygienic alternative to traditional mechanical doorbells. Built using an Arduino Uno and a TTP223 capacitive touch sensor, this project allows users to ring the doorbell simply by touching a sensor pad—no pressing required. It’s a great solution for smart homes and public spaces where minimizing physical contact is important.

When a user touches the sensor, it sends a signal to the Arduino, which then activates a buzzer to produce a chime sound. The system is simple, cost-effective, and easy to build. It can also be expanded by integrating features like wireless alerts or camera systems.

Light Following Robot using Arduino and LDR Sensor

The Light Following Robot is a fun and educational robotics project that uses Arduino Uno and LDR (Light Dependent Resistor) sensors to detect and follow a light source. It mimics the behavior of light-seeking organisms and is great for learning sensor-based automation and basic robotics.

The robot is built on a chassis with two DC motors controlled by an L298N motor driver. Two LDRs are placed at the front to sense light intensity. When one LDR detects more light than the other, the Arduino signals the motors to turn toward the brighter side. If both LDRs detect equal light, the robot moves forward.

Traffic Light Controller using Arduino and Traffic Light Module

The Traffic Light Controller project uses an Arduino Uno and a traffic light module (or individual red, yellow, and green LEDs) to simulate a real-world traffic signal system. It’s an ideal beginner project for understanding automation, timing, and microcontroller-based control systems.

The Arduino is programmed to control the lights in a specific sequence—green (go), yellow (wait), and red (stop)—each with a set time duration. This cycle runs continuously, mimicking an intersection traffic light system. Optional enhancements like pedestrian buttons, vehicle sensors, or countdown timers can be added to make the project more interactive and realistic.

RFID-Based Attendance System using Arduino

The RFID-Based Attendance System is a smart and contactless method to record attendance using RFID technology. It uses an Arduino Uno, RC522 RFID reader, and RFID tags/cards assigned to individuals.

When a person taps their RFID card near the reader, the system reads the card’s UID and checks it against pre-stored data in the Arduino. If the UID is valid, a 16×2 LCD (with I2C) displays a message like “Attendance Marked”, and a buzzer or LED can signal a successful scan. Invalid cards show an “Access Denied” message.

Rain Detection System using Arduino and Rain Sensor

The Rain Detection System is a simple and practical project that uses an Arduino Uno and a rain sensor module to detect the presence of rain or moisture. It is useful for applications like smart irrigation, automatic window control, and home automation.

The system works by using the rain sensor’s sensing plate, which detects water droplets. When it rains, the sensor’s resistance changes and sends a signal to the Arduino. Based on this signal, the Arduino can display a message on a 16×2 LCD (with I2C) or trigger outputs like a buzzer or LED for alerts.