Traffic Light

Emulate a traffic light, that behaves the way it would in Bahrain. Feel free to change it in any way it would in your country!

Component List:

• 1 x Arduino Uno R3
• 3 x LED (any color)
• 3 x Resistor
• Jumper Wires
• 1 x Breadboard
• 1 x Ultrasonic Sensor HC-04

 

Wiring Guide:

1. Connect the anode (longer leg) of each LED to a separate digital pin on the Arduino (pins 2, 3, and 4).
2. Connect the cathode (shorter leg) of each LED to a separate resistor.
3. Connect the other end of each resistor to the ground (GND) on the Arduino.
4. Connect the ground (GND) of the Arduino to the ground rail of the breadboard.
5. Connect the power (5V) of the Arduino to the power rail of the breadboard.

Code:

// Pin definitions
const int redPin = 2;
const int yellowPin = 3;
const int greenPin = 4;

// Time delays in milliseconds
const int redDelay = 5000; // 5 seconds for red
const int yellowDelay = 2000; // 2 seconds for yellow
const int greenDelay = 5000; // 5 seconds for green
const int blinkDelay = 400; // Half second delay for blinking

void setup() {
// Set the LED pins as OUTPUT
pinMode(redPin, OUTPUT);
pinMode(yellowPin, OUTPUT);
pinMode(greenPin, OUTPUT);
}

void loop() {
// Red light
digitalWrite(redPin, HIGH);
digitalWrite(yellowPin, LOW);
digitalWrite(greenPin, LOW);
delay(redDelay);

// Yellow light
digitalWrite(yellowPin, HIGH);
delay(yellowDelay);

// Green light
digitalWrite(redPin, LOW);
digitalWrite(yellowPin, LOW);
digitalWrite(greenPin, HIGH);
delay(greenDelay);

for (int i = 0; i <= 5; i++)
{
digitalWrite(greenPin, LOW);
delay(blinkDelay);
digitalWrite(greenPin, HIGH);
delay(blinkDelay);
}

// Yellow light
digitalWrite(greenPin, LOW);
digitalWrite(yellowPin, HIGH);
delay(yellowDelay);


}

  Looking to build this project? Check out our custom, Bahraini Assembled, starter kit here! https://www.bitware.store/product/arduino-uno-r3-compatible-with-arduino-ide/
[bitware_arabic_portfolio_content]