Introduction: Display Applications With Arduino
This project has been made to counter 9 to 0 with 7-segment display. The project has shown the necessary connections.
Step 1: Electronic Circuit Diagram
Step 2: Arduino Code
// Arduino pin: 2,3,4,5,6,7,8
// Arduino Pin Pin 7 Segment links
//2 7 (A)//3 6 (B)// 4 4 (C)// 5 2 (D)// 6 1 (E)//7 9 (F)// 8 10 (G)//9 5 (DP)
byte seven_seg_digits[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
{ 1,1,1,0,0,1,1 } // = 9};
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);
writeDot(0);
}
void writeDot(byte dot)
{
digitalWrite(9, dot);
}
void sevenSegWrite(byte digit)
{
byte pin = 2; for (byte segCount = 0;
segCount < 7; ++segCount)
{
digitalWrite(pin, seven_seg_digits[digit][segCount]);
++pin;
}
}
void loop()
{
for (byte count = 10;
count > 0; –count)
{
// Countdown to zero
delay(1000);
sevenSegWrite(count – 1);
}
delay(4000);
}
Step 3:
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