Traffic Light LED

A simple 3 led traffic light system.

Jul 28, 2022

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cars

led

road

Devices & Components

Arduino Uno Rev3

Jumper wires (generic)

USB-A to B Cable

5 mm LED: Yellow

Solderless Breadboard Half Size

5 mm LED: Red

5 mm LED: Green

Resistor 220 ohm

Project description

Code

Arduino Traffic Lights Code

c_cpp

1//Coded BY: nolimitcircuit
2//Last edited: 7/28/22...10:02 Am EST 
3
4
5#define   RLED 5 //Pin Red LED is connected to
6#define YLED 6 //Pin Yellow LED is connected   to
7#define GLED 7 //Pin Green LED is connected to 
8
9void setup() {
10   // Declare the LEDs as an output
11  pinMode(RLED, OUTPUT);
12  pinMode(YLED,   OUTPUT);
13  pinMode(GLED, OUTPUT);
14}
15
16void loop() {
17  
18  digitalWrite(GLED,   HIGH); // Turn the Green LED on
19  delay(10000); // Wait for 10000 milliseconds   (10 seconds)
20  digitalWrite(GLED, LOW); // Turn the Green LED off
21  delay(200);   // Wait for 200 milliseconds (.2 seconds)
22  digitalWrite(YLED, HIGH);// Turn   the Yellow LED on
23  delay(4000); //Wait 4000 milliseconds (4 seconds)
24  digitalWrite(YLED,   LOW); // Turn the Yellow LED off
25  delay(200); //Wait for 200 milliseconds (.2   seconds) 
26  digitalWrite(RLED, HIGH); //Turn the red LED on 
27  delay(10000);   //Wait 10000 milliseconds (10 seconds) 
28  digitalWrite(RLED, LOW); //Turn Red   LED off 
29  
30}

//Coded BY: nolimitcircuit
//Last edited: 7/28/22...10:02 Am EST 


#define   RLED 5 //Pin Red LED is connected to
#define YLED 6 //Pin Yellow LED is connected   to
#define GLED 7 //Pin Green LED is connected to 

void setup() {
   // Declare the LEDs as an output
  pinMode(RLED, OUTPUT);
  pinMode(YLED,   OUTPUT);
  pinMode(GLED, OUTPUT);
}

void loop() {
  
  digitalWrite(GLED,   HIGH); // Turn the Green LED on
  delay(10000); // Wait for 10000 milliseconds   (10 seconds)
  digitalWrite(GLED, LOW); // Turn the Green LED off
  delay(200);   // Wait for 200 milliseconds (.2 seconds)
  digitalWrite(YLED, HIGH);// Turn   the Yellow LED on
  delay(4000); //Wait 4000 milliseconds (4 seconds)
  digitalWrite(YLED,   LOW); // Turn the Yellow LED off
  delay(200); //Wait for 200 milliseconds (.2   seconds) 
  digitalWrite(RLED, HIGH); //Turn the red LED on 
  delay(10000);   //Wait 10000 milliseconds (10 seconds) 
  digitalWrite(RLED, LOW); //Turn Red   LED off 
  
}

Arduino Traffic Lights Code

c_cpp

1//Coded BY: nolimitcircuit
2//Last edited: 7/28/22...10:02 Am EST 
3
4
5#define  RLED 5 //Pin Red LED is connected to
6#define YLED 6 //Pin Yellow LED is connected  to
7#define GLED 7 //Pin Green LED is connected to 
8
9void setup() {
10  // Declare the LEDs as an output
11  pinMode(RLED, OUTPUT);
12  pinMode(YLED,  OUTPUT);
13  pinMode(GLED, OUTPUT);
14}
15
16void loop() {
17  
18  digitalWrite(GLED,  HIGH); // Turn the Green LED on
19  delay(10000); // Wait for 10000 milliseconds  (10 seconds)
20  digitalWrite(GLED, LOW); // Turn the Green LED off
21  delay(200);  // Wait for 200 milliseconds (.2 seconds)
22  digitalWrite(YLED, HIGH);// Turn  the Yellow LED on
23  delay(4000); //Wait 4000 milliseconds (4 seconds)
24  digitalWrite(YLED,  LOW); // Turn the Yellow LED off
25  delay(200); //Wait for 200 milliseconds (.2  seconds) 
26  digitalWrite(RLED, HIGH); //Turn the red LED on 
27  delay(10000);  //Wait 10000 milliseconds (10 seconds) 
28  digitalWrite(RLED, LOW); //Turn Red  LED off 
29  
30}

//Coded BY: nolimitcircuit
//Last edited: 7/28/22...10:02 Am EST 


#define  RLED 5 //Pin Red LED is connected to
#define YLED 6 //Pin Yellow LED is connected  to
#define GLED 7 //Pin Green LED is connected to 

void setup() {
  // Declare the LEDs as an output
  pinMode(RLED, OUTPUT);
  pinMode(YLED,  OUTPUT);
  pinMode(GLED, OUTPUT);
}

void loop() {
  
  digitalWrite(GLED,  HIGH); // Turn the Green LED on
  delay(10000); // Wait for 10000 milliseconds  (10 seconds)
  digitalWrite(GLED, LOW); // Turn the Green LED off
  delay(200);  // Wait for 200 milliseconds (.2 seconds)
  digitalWrite(YLED, HIGH);// Turn  the Yellow LED on
  delay(4000); //Wait 4000 milliseconds (4 seconds)
  digitalWrite(YLED,  LOW); // Turn the Yellow LED off
  delay(200); //Wait for 200 milliseconds (.2  seconds) 
  digitalWrite(RLED, HIGH); //Turn the red LED on 
  delay(10000);  //Wait 10000 milliseconds (10 seconds) 
  digitalWrite(RLED, LOW); //Turn Red  LED off 
  
}

Downloadable files

Arduino Traffic Lights Schematics

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