LEARN HOW TO USE SEVEN SEGMENT DISPLAY(LT542) WITH ARDUINO



Hardware required:
1) Arduino UNO
2) LT542
3) Jumper wires(Male to Male)
4) 220 Ohm resistor

LT542 SEVEN SEGMENT DISPLAY IS USED HERE WHICH IS OF COMMON ANODE ARRANGEMENT.

 Using Fritzing software,I have developed breadboard structure and schematic for easy understanding.

 Here is the following code written on microcontroller of arduino board.
void setup() 
{              
  pinMode(2, OUTPUT); 
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  digitalWrite(9,1);  // start with the "dot" off
  }

void loop() 
{
 // write '9'
 digitalWrite(2, 0);
 digitalWrite(3, 0);
 digitalWrite(4, 0);
 digitalWrite(5, 1);
 digitalWrite(6, 1);
 digitalWrite(7, 0);
 digitalWrite(8, 0);
 delay(1000);
 // write '8'
 digitalWrite(2, 0);
 digitalWrite(3, 0);
 digitalWrite(4, 0);
 digitalWrite(5, 0);
 digitalWrite(6, 0);
 digitalWrite(7, 0);
 digitalWrite(8, 0);
 delay(1000);
 // write '7'
 digitalWrite(2, 0);
 digitalWrite(3, 0);
 digitalWrite(4, 0);
 digitalWrite(5, 1);
 digitalWrite(6, 1);
 digitalWrite(7, 1);
 digitalWrite(8, 1);
 delay(1000);
 // write '6'
 digitalWrite(2, 0);
 digitalWrite(3, 1);
 digitalWrite(4, 0);
 digitalWrite(5, 0);
 digitalWrite(6, 0);
 digitalWrite(7, 0);
 digitalWrite(8, 0);
 delay(1000);
 // write '5'
 digitalWrite(2, 0);
 digitalWrite(3, 1);
 digitalWrite(4, 0);
 digitalWrite(5, 0);
 digitalWrite(6, 1);
 digitalWrite(7, 0);
 digitalWrite(8, 0);
 delay(1000);
 // write '4'
 digitalWrite(2, 1);
 digitalWrite(3, 0);
 digitalWrite(4, 0);
 digitalWrite(5, 1);
 digitalWrite(6, 1);
 digitalWrite(7, 0);
 digitalWrite(8, 0);
 delay(1000);
 // write '3'
 digitalWrite(2, 0);
 digitalWrite(3, 0);
 digitalWrite(4, 0);
 digitalWrite(5, 0);
 digitalWrite(6, 1);
 digitalWrite(7, 1);
 digitalWrite(8, 0);
 delay(1000);
 // write '2'
 digitalWrite(2, 0);
 digitalWrite(3, 0);
 digitalWrite(4, 1);
 digitalWrite(5, 0);
 digitalWrite(6, 0);
 digitalWrite(7, 1);
 digitalWrite(8, 0);
 delay(1000);
 // write '1'
 digitalWrite(2, 1);
 digitalWrite(3, 0);
 digitalWrite(4, 0);
 digitalWrite(5, 1);
 digitalWrite(6, 1);
 digitalWrite(7, 1);
 digitalWrite(8, 1);
 delay(1000);
 // write '0'
 digitalWrite(2, 0);
 digitalWrite(3, 0);
 digitalWrite(4, 0);
 digitalWrite(5, 0);
 digitalWrite(6, 0);
 digitalWrite(7, 0);
 digitalWrite(8, 1);
 delay(4000);
} 
                        
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