Traffic light with counter

An led traffic light with with extra counter liquid crystal LCD.

Jul 28, 2020

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Components and supplies

Arduino UNO

Resistor 220 ohm

Jumper wires (generic)

Breadboard (generic)

5 mm LED: Yellow

5 mm LED: Green

5 mm LED: Red

Standard LCD - 16x2 White on Blue

Apps and platforms

Arduino IDE

Project description

Code

code

c_cpp

1#include <LiquidCrystal.h>
2const int green_pin=8;
3const int yellow_pin=9;
4const  int red_pin=10;
5const int green_delay=12000;
6const int yellow_delay=3000;
7const  int red_delay=12000;
8LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
9void green()
10{
11  for(int time1=12;time1>0;time1--)
12  {
13    digitalWrite(green_pin, HIGH);
14    digitalWrite(yellow_pin, LOW);
15    digitalWrite(red_pin, LOW);  
16    lcd.print(time1);
17    delay(1000);
18    lcd.clear();
19  }
20}
21void yellow()
22{  
23  for(int  time2=3;time2>0;time2--)
24  {
25    digitalWrite(green_pin, LOW);
26    digitalWrite(yellow_pin,  HIGH);
27    digitalWrite(red_pin, LOW);  
28    lcd.print(time2);
29    delay(1000);
30    lcd.clear();
31  }
32}
33void red()
34{
35  for(int time3=12;time3>0;time3--)
36  {
37    digitalWrite(green_pin, LOW);
38    digitalWrite(yellow_pin, LOW);
39    digitalWrite(red_pin, HIGH);  
40    lcd.print(time3);
41    delay(1000);
42    lcd.clear();
43   }
44}
45void setup()
46{
47  Serial.begin(9600);
48  lcd.begin(16, 2);
49  pinMode(green_pin, OUTPUT);
50  pinMode(yellow_pin, OUTPUT);
51  pinMode(red_pin, OUTPUT);
52}
53void loop()
54{
55  green();
56  yellow();
57  red(); 
58}

#include <LiquidCrystal.h>
const int green_pin=8;
const int yellow_pin=9;
const  int red_pin=10;
const int green_delay=12000;
const int yellow_delay=3000;
const  int red_delay=12000;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void green()
{
  for(int time1=12;time1>0;time1--)
  {
    digitalWrite(green_pin, HIGH);
    digitalWrite(yellow_pin, LOW);
    digitalWrite(red_pin, LOW);  
    lcd.print(time1);
    delay(1000);
    lcd.clear();
  }
}
void yellow()
{  
  for(int  time2=3;time2>0;time2--)
  {
    digitalWrite(green_pin, LOW);
    digitalWrite(yellow_pin,  HIGH);
    digitalWrite(red_pin, LOW);  
    lcd.print(time2);
    delay(1000);
    lcd.clear();
  }
}
void red()
{
  for(int time3=12;time3>0;time3--)
  {
    digitalWrite(green_pin, LOW);
    digitalWrite(yellow_pin, LOW);
    digitalWrite(red_pin, HIGH);  
    lcd.print(time3);
    delay(1000);
    lcd.clear();
   }
}
void setup()
{
  Serial.begin(9600);
  lcd.begin(16, 2);
  pinMode(green_pin, OUTPUT);
  pinMode(yellow_pin, OUTPUT);
  pinMode(red_pin, OUTPUT);
}
void loop()
{
  green();
  yellow();
  red(); 
}

code

c_cpp

1#include <LiquidCrystal.h>
2const int green_pin=8;
3const int yellow_pin=9;
4const   int red_pin=10;
5const int green_delay=12000;
6const int yellow_delay=3000;
7const   int red_delay=12000;
8LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
9void green()
10{
11   for(int time1=12;time1>0;time1--)
12  {
13    digitalWrite(green_pin, HIGH);
14     digitalWrite(yellow_pin, LOW);
15    digitalWrite(red_pin, LOW);  
16    lcd.print(time1);
17     delay(1000);
18    lcd.clear();
19  }
20}
21void yellow()
22{  
23  for(int   time2=3;time2>0;time2--)
24  {
25    digitalWrite(green_pin, LOW);
26    digitalWrite(yellow_pin,   HIGH);
27    digitalWrite(red_pin, LOW);  
28    lcd.print(time2);
29    delay(1000);
30     lcd.clear();
31  }
32}
33void red()
34{
35  for(int time3=12;time3>0;time3--)
36   {
37    digitalWrite(green_pin, LOW);
38    digitalWrite(yellow_pin, LOW);
39     digitalWrite(red_pin, HIGH);  
40    lcd.print(time3);
41    delay(1000);
42     lcd.clear();
43   }
44}
45void setup()
46{
47  Serial.begin(9600);
48   lcd.begin(16, 2);
49  pinMode(green_pin, OUTPUT);
50  pinMode(yellow_pin, OUTPUT);
51   pinMode(red_pin, OUTPUT);
52}
53void loop()
54{
55  green();
56  yellow();
57   red(); 
58}

#include <LiquidCrystal.h>
const int green_pin=8;
const int yellow_pin=9;
const   int red_pin=10;
const int green_delay=12000;
const int yellow_delay=3000;
const   int red_delay=12000;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void green()
{
   for(int time1=12;time1>0;time1--)
  {
    digitalWrite(green_pin, HIGH);
     digitalWrite(yellow_pin, LOW);
    digitalWrite(red_pin, LOW);  
    lcd.print(time1);
     delay(1000);
    lcd.clear();
  }
}
void yellow()
{  
  for(int   time2=3;time2>0;time2--)
  {
    digitalWrite(green_pin, LOW);
    digitalWrite(yellow_pin,   HIGH);
    digitalWrite(red_pin, LOW);  
    lcd.print(time2);
    delay(1000);
     lcd.clear();
  }
}
void red()
{
  for(int time3=12;time3>0;time3--)
   {
    digitalWrite(green_pin, LOW);
    digitalWrite(yellow_pin, LOW);
     digitalWrite(red_pin, HIGH);  
    lcd.print(time3);
    delay(1000);
     lcd.clear();
   }
}
void setup()
{
  Serial.begin(9600);
   lcd.begin(16, 2);
  pinMode(green_pin, OUTPUT);
  pinMode(yellow_pin, OUTPUT);
   pinMode(red_pin, OUTPUT);
}
void loop()
{
  green();
  yellow();
   red(); 
}

Downloadable files

schematic

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