OBJECTIVE
Display numerical data using a 2-digit seven-segment display with an Arduino Uno.
MODULES REQUIRED
- Arduino UNO
- Seven segment Display
- Jumper wire
SCHEMATIC DIAGRAM
Connecting a 7-Segment Display to Arduino:
- A-G to D2-D8
- SEG 1 to D13
- SEG 2 to D12
ARDUINO CODE
JavaScript
//Prepare binary array for all 7 segment to turn on 7 segment at
position of a,b,c,d,e,f,g
int digit[10] = {0b0111111, 0b0000110, 0b1011011, 0b1001111,
0b1100110, 0b1101101, 0b1111101, 0b0000111, 0b1111111,
0b1101111};
int digit1, digit2; // initialize individual digit to controll each segment
void setup(){
for (int i = 2; i < 9; i++) {
pinMode(i, OUTPUT); // declare 0-9 th pin as output
}
pinMode(12, OUTPUT); //declare 7 seg Digit1 pin as output
pinMode(13, OUTPUT);//declare 7 seg Digit2 pin as output
}
void loop() {
for (int j = 0; j <= 99; j++)// for lopp to pass value from 00-99
{
digit2 = j / 10;
digit1 = j % 10;
for ( int k = 0; k < 20; k++)// For loop to control the digit control to
print 00-99
{
digitalWrite(12, HIGH);
digitalWrite(13, LOW);
dis(digit2);
delay(10);
digitalWrite(13, HIGH);
digitalWrite(12, LOW);
dis(digit1);
delay(10);
} } }
void dis(int num){
for (int i = 2; i < 9; i++) {
digitalWrite(i, bitRead(digit[num], i - 2));
} }
INSTRUCTIONS
- Connect the modules and components as per the schematic diagram.
- Upload the Arduino code into the Arduino board.
- Check the 7 segment displays shows number 00 to 99.
WORKING
- The Arduino UNO cycles through numbers 00 to 99, converting each digit to its corresponding 7-segment code and displaying it on the two-digit 7-segment display sequentially.
