Design and Development of the Mechanical Structures for Smart Street Light Control

The rapid growth of urbanization has increased the demand for energy-efficient infrastructure, particularly in street lighting, which often operates at full capacity regardless of actual need, leading to significant energy wastage. This project proposes a smart, low-cost street light control system designed to address these inefficiencies by automating lighting operations using an Arduino Uno microcontroller. The system utilizes a Light Dependent Resistor (LDR) to detect ambient light levels, ensuring that lights only turn on during the night or in low-light, cloudy conditions. To further optimize power consumption, Passive Infrared (PIR) sensors or IR sensors are deployed to detect the motion of vehicles or pedestrians. When motion is detected, the lights operate at 100% intensity; otherwise, they dim to a lower power state (e.g., 10%–20%) or turn off completely. Key components include the Arduino microcontroller, LDR sensor, IR/PIR sensors, relay modules (for controlling high-voltage AC lights), and LED luminaires. In some implementations, a Real-Time Clock (RTC) module is integrated to ensure precise scheduling. Experimental results indicate that this system can reduce energy consumption by up to 65% compared to conventional, always-on lighting systems. Furthermore, the system enhances safety by ensuring adequate lighting when needed and reduces maintenance costs by extending the lifespan of the lamps.