Coding a Smart Traffic Light Using Arduino (Grade 5–7)

Overview:

This hands-on project introduces students to embedded systems through an engaging real-world problem: designing a smart traffic signal using Arduino and an ultrasonic sensor.

Learning Objectives:

• Understand automation and input/output logic

• Apply loops and conditional statements

• Learn basic circuit building and sensor integration

Tools Required:

• Arduino Uno

• Ultrasonic sensor

• LEDs (Red, Yellow, Green)

• Jumper wires & breadboard

• Arduino IDE / Tinkercad simulator

Procedure Highlights:

1. Introduce the real-life challenge: smart city traffic control.

2. Guide students through circuit connections.

3. Use code to trigger LED changes based on vehicle distance.

4. Test and debug in groups.

Downloadable Files:

📥 [Lesson Plan PDF] and 📎 [Sample Arduino Code]

Download

Reflection Tip:

Encourage students to think: How could this be used in their own neighborhood?