Project - 14 :- Traffic Light Using By Arduino

                               PROJECT – Traffic Light

                       In this tutorial you will learn how to make Traffic Light with Arduino.

                                                   STEP – 1 Components

Components Required:-

1.    Arduino Uno

2.    Breadboard

3.    3  LED

4.    7 Segment

5.    3x 220Ohm resistors,1 1KOhm

Wires.

                                       STEP – 2: Circuit

The connections are pretty easy, see the image above with the breadboard circuit schematic.

                                        STEP – 3 : Code

int displayPin[] = { 2, 3, 4, 5, 6, 7, 8 };

#define GREEN 11

#define YELLOW 12

#define RED 13

// define digits segments

int digit[10][7] = {

{ 1, 1, 1, 1, 1, 1, 0 }, // 0

{ 0, 1, 1, 0, 0, 0, 0 }, // 1

{ 1, 1, 0, 1, 1, 0, 1 }, // 2

{ 1, 1, 1, 1, 0, 0, 1 }, // 3

{ 0, 1, 1, 0, 0, 1, 1 }, // 4

{ 1, 0, 1, 1, 0, 1, 1 }, // 5

{ 1, 0, 1, 1, 1, 1, 1 }, // 6

{ 1, 1, 1, 0, 0, 0, 0 }, // 7

{ 1, 1, 1, 1, 1, 1, 1 }, // 8

{ 1, 1, 1, 1, 0, 1, 1 } // 9

};

void showNumber(int num) {

for (int i = 0; i < 7; i++) {

digitalWrite(displayPin[i], digit[num][i]);

}

}

void sequence(int seconds, int color) {

lightsOff();

digitalWrite(color, HIGH);

for (int i = seconds; i >= 0; i--) {

showNumber(i);

delay(1000);

}

}

void lightsOff() {

digitalWrite(GREEN, LOW);

digitalWrite(YELLOW, LOW);

digitalWrite(RED, LOW);

}

void setup() {

for (int i = 0; i < 7; i++) {

pinMode(displayPin[i], OUTPUT);

}

pinMode(GREEN, OUTPUT);

pinMode(YELLOW, OUTPUT);

pinMode(RED, OUTPUT);

lightsOff();

}

void loop() {

sequence(9, RED); // switch to RED, then count down from 9 to 0

sequence(5, YELLOW); // switch to YELLOW, then count down from 5 to 0

sequence(9, GREEN); // switch to GREEN, then count down from 9 to 0

}

       /* Copy above Code and Paste in Your Arduino Sketch */

    Step 5: Well Done!

You have successfully completed one more Arduino Project and you learned how to make a Traffic Light with Arduino.

                  THANKYOU!

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