PIR Motion Alarm System
A simple but effective motion-activated alarm using a PIR sensor, buzzer, and LED. Detects human movement within a 7m range and triggers an audible and visual alert. Perfect for doorway monitoring or room intrusion detection.
RFID Door Lock System with RC522
A contactless door lock system using the MFRC522 RFID reader and a servo motor as the locking mechanism. Authorized RFID cards or keyfobs unlock the door, while unauthorized tags trigger a denial buzzer.
ESP32 Weather Station with OLED Display
Build a compact weather station using an ESP32, a BME280 sensor for temperature/humidity/pressure, and a 0.96" OLED display. The station reads live environmental data and displays it on screen with auto-refreshing intervals.
Bluetooth Controlled Car with HC-05
Build a smartphone-controlled RC car using Arduino, an HC-05 Bluetooth module, and the L298N motor driver. Control forward, backward, left, right, and stop from any Bluetooth serial terminal app on your phone.
Line Following Robot with IR Sensors
Build a two-wheeled robot that autonomously follows a black line on a white surface using IR reflectance sensors. Uses an L298N motor driver to control two DC gear motors with differential steering.
Automatic Plant Irrigation System with Soil Moisture Sensor
An automated plant watering system that monitors soil moisture levels and activates a water pump when the soil is too dry. Uses a capacitive soil moisture sensor and a relay module to control a 5V submersible pump.
IR Remote Controlled LED Strip
Control an RGB LED strip using any IR remote control. Map different remote buttons to colors, brightness levels, and effects. Uses an IR receiver module and MOSFET transistors to drive the LED strip from an Arduino.
Gas Leak Detection System with MQ-2 Sensor
A safety-critical gas leak detection system using the MQ-2 smoke and gas sensor. Detects LPG, propane, methane, and smoke. Triggers an audible alarm via buzzer and a visual LED alert when gas concentration exceeds the set threshold.
Temperature & Humidity Monitor with DHT11 and LCD
A real-time temperature and humidity monitoring system using the DHT11 sensor and a 16x2 LCD. Displays live readings with min/max tracking. Ideal for room climate monitoring or greenhouse environments.
Arduino Radar System with Processing Visualization
Build a mini radar system using an Arduino, a servo motor, and an HC-SR04 ultrasonic sensor. The servo sweeps 180° while the sensor scans for objects. Data is sent to a Processing sketch that renders a real-time radar display on your computer.
Smart Blind Stick with Obstacle Detection
An assistive device for visually impaired individuals. Uses an ultrasonic sensor to detect obstacles ahead and alerts the user with a buzzer and vibration motor. Lightweight and battery powered.
Smart Dustbin with Auto-Open Lid
Build an automatic dustbin that opens its lid when it detects someone approaching. Uses an HC-SR04 ultrasonic sensor to detect proximity and a servo motor to control the lid. Perfect for touchless hygiene.