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Automatic Street Lights Triggered by Vehicle Movement Project


Energy conservation is the need of the hour, and our automatic street light project is at the forefront of this movement. This advanced system ensures that street lights only operate when they detect vehicle movement, significantly reducing energy consumption.

How It Works

The innovative system employs sensors placed strategically to detect vehicle movement. Upon detection, the street lights in the vehicle’s path illuminate to full intensity, while the lights behind the vehicle revert to a lower intensity or turn off entirely. The system leverages Pulse Width Modulation (PWM) for intensity control, executed through an 8051 microcontroller.

Hardware & Software Specifications

  • Hardware: 8051 Microcontroller, Crystal Oscillator, Resistors, Capacitors, Transistors, Diodes, PCB and Breadboards, etc.
  • Software: Keil µVision IDE and Embedded C programming language.

Modes of Operation

  • Energy-Saver Mode: Lights remain off and only switch on upon vehicle detection.
  • Eco Mode: Lights stay on at 10% intensity and switch to full brightness when a vehicle is detected.


  • Energy Efficiency: Significant reduction in power consumption.
  • Safety: Ensures well-lit conditions for moving vehicles.
  • Adaptive: Can adapt to different environmental conditions.

Block Diagram and Further Details

For a comprehensive understanding, a detailed block diagram and project report PDF are available, providing in-depth information and a complete project explanation.


The automatic street light system based on vehicle movement is a step forward in intelligent energy management and safety on the roads. The system promises not only energy savings but also a reduction in maintenance and operational costs.

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