IoT-based Light Dimmer and Speed Controller

A robust, Arduino-powered IoT system for precise remote control of lighting and motor speed/direction, featuring real-time LCD feedback. Built, tested, and shared using the Wokwi simulator for maximum reproducibility and accessibility.

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Overview

This project demonstrates how to design and implement an IoT-based light dimmer and speed controller using Arduino. Users can remotely and precisely adjust both light intensity and motor speed/direction via a physical interface, with all states clearly displayed on an LCD. The modular design makes the solution scalable and adaptable for smart home, industrial, or educational applications.

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Online Simulation (Try it now!)

This project was fully developed and tested using the Wokwi online Arduino simulator, making it easy for anyone to run, share, and experiment with the design—even without real hardware.

• Open the project in Wokwi simulator
• View, run, and modify the simulation instantly online.

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Features

• Remote Control: Adjust light brightness and motor speed/direction via simple interface.
• Modular Design: Separated code for light dimming and speed control.
• LCD Display: Real-time feedback for all parameters (brightness %, speed %, motor mode).
• Energy Efficiency: Fine-tuned control for optimized energy use.
• User-Friendly: Three-button interface for intuitive operation.
• Cloud Simulation: Open, run, and share via Wokwi without any hardware.

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Hardware Components

• Arduino Uno (or compatible)
• Bipolar Stepper Motor (e.g., 200 steps/rev)
• Potentiometer (linear, for analog input)
• 3 Push Buttons (Clockwise, Stop, Anticlockwise)
• LCD Display (20x4 I2C)
• LED (for dimming demo)
• Resistors (as needed)
• Wires & Breadboard

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Circuit Diagram

Add your circuit diagram in the images/ folder and link it here.

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Arduino Code

All code is provided in the code/arduino_light_dimmer_speed_controller.ino file.

Key features:

• Reads potentiometer value to set both light brightness (PWM) and stepper speed.
• Displays current state (brightness, speed %, motor mode) on LCD.
• Controls stepper direction/speed based on push buttons.
• Modular and fully commented for easy customization.

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Getting Started

1. Hardware Setup

• Connect the potentiometer to analog pin A0.
• Connect push buttons to pins A1, A2, and A3 (internal pull-ups enabled).
• Connect the LCD (I2C, address 0x27) to the appropriate I2C pins.
• Connect LED to PWM pin 6 (with resistor).
• Connect the stepper motor to pins 8, 9, 10, 11.

2. Software Setup

• Install Arduino IDE.
• Install libraries: LiquidCrystal_I2C, Stepper
• Load code/arduino_light_dimmer_speed_controller.ino into the IDE.
• Upload the code to Arduino Uno.

3. Usage

• Use potentiometer to set light brightness and motor speed.
• Press Clockwise button for forward motion.
• Press Anticlockwise for reverse.
• Press Stop to halt the motor.
• Observe LCD for all state changes.

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Example Output

Add your LCD screenshots and result images in the images/ folder.

• Light dimmed to 98%
  
• Motor running Anticlockwise at 98% speed
  

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