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Traffic Light

In this example we will make a single-lane traffic light with the Franzininho DIY.

Materials​

  • Franzininho board
  • Breadboard
  • Red LED
  • Yellow LED
  • Green LED
  • 3 330 R resistors
  • Jumper wires

Circuit​

Make the following connections on the breadboard:

traffic light circuit

Sketch

/*
  Franzininho
  Example: Traffic Light
  In this example we will make a single-lane traffic light.
*/
int red = 2;    // Red LED
int yellow = 1; // Yellow LED
int green = 0;  // Green LED

void setup() {
  pinMode(red, OUTPUT);    // define red LED as Output
  pinMode(green, OUTPUT);  // define green LED as Output
  pinMode(yellow, OUTPUT); // define yellow LED as Output
}

void loop() {
  // phase 1
  digitalWrite(red, HIGH);
  digitalWrite(yellow, LOW);
  digitalWrite(green, LOW);
  delay(5000);
  // phase 2
  digitalWrite(red, LOW);
  digitalWrite(yellow, HIGH);
  digitalWrite(green, LOW);
  delay(1000);
  // phase 3
  digitalWrite(red, LOW);
  digitalWrite(yellow, LOW);
  digitalWrite(green, HIGH);
  delay(5000);
}

Simulation​

Working Video​