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smart-street-light-en.md

Urban Efficiency: The Smart Street Light

The Smart Street Light project replicates modern city infrastructure. Traditional street lights burn massive amounts of coal by staying on at 100% brightness all night. This project proposes a smart, energy-saving solution using LDRs and IR sensors.

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The Dual-Sensor Logic

  1. Ambient Light (LDR): During the day, the Photoresistor (LDR) tells the Arduino to keep the street light entirely OFF. As evening falls, the light turns on at a dim 20% brightness (using PWM).
  2. Proximity (IR Sensor): An Infrared obstacle sensor is mounted at the base of the light pole.
  3. The Boost: When a pedestrian or car passes the pole, the IR sensor triggers the Arduino to boost the LED brightness to 100% for 10 seconds, before returning to 20%.

Hardware Requirements

  • Arduino Uno/Nano: To process the logic.
  • Photoresistor (LDR): To detect Day/Night cycles.
  • IR Obstacle Sensor: To detect passing traffic.
  • High-Power White LEDs: The street lamps.

Why Build This?

This project is a perfect demonstration of IoT for Smart Cities. It teaches you how to combine two different sensor inputs (if (NightTime && ObjectDetected)) to create highly efficient, logic-gated automation systems.

ข้อมูล Frontmatter ดั้งเดิม 

title: "Smart Street Light System"
description: "Save city power! Build a miniature street light model that automatically turns on at night and brightens only when a car or person is detected."
category: "Sensors & Environment"
difficulty: "Intermediate"