Biometrics Attendance System

Install Adafruit_Fingerprint library

Smart Parking With OLED

Alcohol Detector

Air Defense System with Radar

Bluetooth Home Automation

Bluetooth-Controlled Smart Home AC Hub

A wireless AC appliance switching hub using an Arduino Uno and Bluetooth (HC-05/06). Safely bridge the gap between low-voltage DC signals and high-voltage AC power to control lights, fans, or heaters from your smartphone via a serial terminal app.

ESP32 WiFi-Controlled Robotic Car

Build a high-torque WiFi-controlled robotic car using an ESP32 and L298N motor driver. Features a custom web-based dashboard for real-time smartphone control, two-wheel drive with a caster for agile maneuvering, and Li-ion power management.

Obstacle Avoiding Robot with Servo Scanning

An autonomous robot that navigates around obstacles using an ultrasonic sensor mounted on a servo for 180° scanning. The robot looks left and right when an obstacle is detected and chooses the clearest path to continue.

Clap Switch — Sound Activated Light

Turn a lamp on and off by clapping twice. Uses a sound sensor module to detect sharp sounds and a relay module to toggle a mains-powered light or appliance. Classic home automation project.

ESP32 Wi-Fi Web Server for LED Control

Create a web-based dashboard served directly from an ESP32 that lets you toggle LEDs on and off from any browser on the same Wi-Fi network. A great introduction to IoT and embedded web servers.

Arduino Ultrasonic Distance Meter

A simple yet practical distance measurement tool using an Arduino Uno and an HC-SR04 ultrasonic sensor. The measured distance is displayed on a 16×2 LCD and simultaneously output to the Serial Monitor for logging.

Water Level Indicator with LED Bar

A visual water level monitoring system using simple wire probes at different heights in a tank. Four LEDs indicate the water level from empty to full. Includes a buzzer alarm when the tank overflows.