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.

Earthquake Detector using Arduino and Vibration Sensor

The Earthquake Detector is a basic yet effective project built using an Arduino Uno and a vibration sensor (SW-420) to detect tremors or seismic activity. The sensor continuously monitors ground vibrations. When sudden or strong vibrations are detected, it sends a signal to the Arduino, which then triggers an alarm using a buzzer or LED to alert nearby individuals.

This system is simple to build and helps demonstrate how vibration sensing can be used in early warning systems. It can be further enhanced by integrating a 16×2 LCD to display real-time status or even a GSM module to send alerts remotely.

Real-Time Clock Display using Arduino and RTC Module

The Real-Time Clock (RTC) Display is a practical Arduino project that shows the current time and date using an RTC module like the DS3231 or DS1307, and a 16×2 LCD with I2C interface. The RTC module keeps track of time even when the Arduino is powered off, thanks to its internal battery.

The Arduino reads the time and date from the RTC module via I2C communication and continuously updates the LCD display. It shows real-time hours, minutes, seconds, and date, making it ideal for clocks, loggers, or time-based automation projects.

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.

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.

Flame Detector Alarm using Arduino and Flame Sensor

The Flame Detector Alarm project is a safety-focused system that uses an Arduino Uno and an IR flame sensor to detect fire or flame and trigger an alert. It is ideal for early fire detection in homes, labs, or industrial areas.

The IR flame sensor detects infrared light emitted by fire within a specific range. When a flame is detected, the sensor sends a signal to the Arduino, which immediately activates a buzzer and an LED indicator. This provides both audible and visual warnings of potential fire hazards.