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HANDS-ON STEAM PROJECT

Automatic Street Light

Grade: 7–8Difficulty: Beginner

Demonstrate light-sensitive control with a low-voltage LED.

Instructions and Learning Resources

Learning objectives

Discover voltage dividers, thresholds and automatic lighting using an LDR.

Steps

  1. Read ambient light levels with a controller.
  2. Choose a dim-light threshold.
  3. Switch a current-limited low-voltage LED.
  4. Test in bright and shaded environments.

Do not use mains lighting for a classroom breadboard experiment.