Smart Light Switch Project
Project Overview
The Smart Light Switch using Arduino provides an intelligent lighting solution with both manual and automatic control capabilities. This innovative system adapts to user preferences and environmental conditions, offering seamless brightness control and presence detection for optimal energy efficiency.
- Potentiometer-based brightness adjustment
- Manual on/off switch control
- Direct user control over lighting intensity
- Immediate response to user input
- BH1750 light sensor for ambient brightness detection
- Automatic brightness adjustment based on surrounding light
- Dual HC-SR04 ultrasonic sensors for presence detection
- Smart on/off control based on human presence
Key Technical Features:
- Toggle switch for seamless mode switching
- TRIAC-based light output control for efficiency
- Real-time sensor data processing
- Energy-efficient smart lighting solution
- Responsive presence detection system
This system represents a perfect blend of manual control flexibility and automated intelligence, making it suitable for various applications from home automation to commercial lighting systems. The TRIAC control ensures smooth dimming and energy efficiency.
Circuit Diagram & Components
Complete Circuit Diagram
Smart light switch with Teammate
Smart light switch with Teammate 2
Components Used:
- Arduino Nano: Main microcontroller for system control
- BH1750: Digital light intensity sensor for ambient light detection
- HC-SR04 (x2): Ultrasonic sensors for presence detection
- TRIAC: AC power control for smooth dimming
- Potentiometer: Manual brightness control in manual mode
- Toggle Switches: Mode selection and manual on/off control
- Optocoupler: Electrical isolation for safety
The circuit diagram illustrates the comprehensive connections between the Arduino, sensors, TRIAC control circuit, and user interface components. The dual-mode design ensures versatility while maintaining safety through proper isolation circuits.
You can find the complete source code here
Project Demonstration
The demonstration video showcases both manual and automatic modes of the Smart Light Switch. You can observe the smooth brightness transitions, presence detection capabilities, and the seamless switching between different operational modes. The video highlights the system's responsiveness to ambient light changes and human presence detection.
Demo Highlights:
- Manual brightness control using potentiometer
- Automatic brightness adjustment based on ambient light
- Presence detection and automatic on/off functionality
- Mode switching demonstration
- TRIAC-controlled smooth dimming operation