Arduino 4 digit 7 segment display
Arduino 4 digit 7 segment display
Arduino 4 digit 7 segment display
This instructable is more for its code then any thing else. I remember my beginning days of Arduino, I had a difficulty doing this LED display because I did not have a clear knowledge of Arrays (and i still don't) so I had a hard time finding a examples that did not use Arrays, so after a while I succeeded in making it this way.

So to all the other people who don't understand Arrays here is another way of making a 4 digit 7 segment display work.

int aPin = 2; // A
int bPin = 3; // ________
int cPin = 4; // | |
int dPin = 5; // F | | B
int ePin = 6; // | G |
int fPin = 7; // |________|
int gPin = 8; // | |
int GND1 = 9; // | |
int GND2 = 10; // E | | C
int GND3 = 11; // |________|
int GND4 = 12; //
int num; // D
int dig1 = 0;
int dig2 = 0;
int dig3 = 0;
int dig4 = 0;
int DTime = 4;


void setup()
{
pinMode(aPin, OUTPUT);
pinMode(bPin, OUTPUT);
pinMode(cPin, OUTPUT);
pinMode(dPin, OUTPUT);
pinMode(ePin, OUTPUT);
pinMode(fPin, OUTPUT);
pinMode(gPin, OUTPUT);
pinMode(GND1, OUTPUT);
pinMode(GND2, OUTPUT);
pinMode(GND3, OUTPUT);
pinMode(GND4, OUTPUT);
Serial.begin(9600);
}
void loop()
{
digitalWrite( GND1, HIGH);
digitalWrite( GND2, HIGH);
digitalWrite( GND3, HIGH);
digitalWrite( GND4, HIGH);

if (Serial.available() > 0)
{
num = Serial.parseInt();
Serial.println(num);
dig1 = num / 1000;
num = num - (dig1 * 1000);
dig2 = num / 100;
num = num - (dig2 * 100);
dig3 = num / 10;
dig4 = num - (dig3 *10);
}


digitalWrite( GND4, LOW); //digit 4
pickNumber(dig4);
delay(DTime);
digitalWrite( GND4, HIGH);

digitalWrite( GND3, LOW); //digit 3
pickNumber(dig3);
delay(DTime);
digitalWrite( GND3, HIGH);

digitalWrite( GND2, LOW); //digit 2
pickNumber(dig2);
delay(DTime);
digitalWrite( GND2, HIGH);

digitalWrite( GND1, LOW); //digit 1
pickNumber(dig1);
delay(DTime);
digitalWrite( GND1, HIGH);

}

void pickNumber(int x){
switch(x){
case 1: one(); break;
case 2: two(); break;
case 3: three(); break;
case 4: four(); break;
case 5: five(); break;
case 6: six(); break;
case 7: seven(); break;
case 8: eight(); break;
case 9: nine(); break;
default: zero(); break;
}
}

void clearLEDs()
{
digitalWrite( 2, LOW); // A
digitalWrite( 3, LOW); // B
digitalWrite( 4, LOW); // C
digitalWrite( 5, LOW); // D
digitalWrite( 6, LOW); // E
digitalWrite( 7, LOW); // F
digitalWrite( 8, LOW); // G
}

void one()
{
digitalWrite( aPin, LOW);
digitalWrite( bPin, HIGH);
digitalWrite( cPin, HIGH);
digitalWrite( dPin, LOW);
digitalWrite( ePin, LOW);
digitalWrite( fPin, LOW);
digitalWrite( gPin, LOW);
}

void two()
{
digitalWrite( aPin, HIGH);
digitalWrite( bPin, HIGH);
digitalWrite( cPin, LOW);
digitalWrite( dPin, HIGH);
digitalWrite( ePin, HIGH);
digitalWrite( fPin, LOW);
digitalWrite( gPin, HIGH);
}

void three()
{
digitalWrite( aPin, HIGH);
digitalWrite( bPin, HIGH);
digitalWrite( cPin, HIGH);
digitalWrite( dPin, HIGH);
digitalWrite( ePin, LOW);
digitalWrite( fPin, LOW);
digitalWrite( gPin, HIGH);
}

void four()
{
digitalWrite( aPin, LOW);
digitalWrite( bPin, HIGH);
digitalWrite( cPin, HIGH);
digitalWrite( dPin, LOW);
digitalWrite( ePin, LOW);
digitalWrite( fPin, HIGH);
digitalWrite( gPin, HIGH);
}

void five()
{
digitalWrite( aPin, HIGH);
digitalWrite( bPin, LOW);
digitalWrite( cPin, HIGH);
digitalWrite( dPin, HIGH);
digitalWrite( ePin, LOW);
digitalWrite( fPin, HIGH);
digitalWrite( gPin, HIGH);
}

void six()
{
digitalWrite( aPin, HIGH);
digitalWrite( bPin, LOW);
digitalWrite( cPin, HIGH);
digitalWrite( dPin, HIGH);
digitalWrite( ePin, HIGH);
digitalWrite( fPin, HIGH);
digitalWrite( gPin, HIGH);
}

void seven()
{
digitalWrite( aPin, HIGH);
digitalWrite( bPin, HIGH);
digitalWrite( cPin, HIGH);
digitalWrite( dPin, LOW);
digitalWrite( ePin, LOW);
digitalWrite( fPin, LOW);
digitalWrite( gPin, LOW);
}

void eight()
{
digitalWrite( aPin, HIGH);
digitalWrite( bPin, HIGH);
digitalWrite( cPin, HIGH);
digitalWrite( dPin, HIGH);
digitalWrite( ePin, HIGH);
digitalWrite( fPin, HIGH);
digitalWrite( gPin, HIGH);
}

void nine()
{
digitalWrite( aPin, HIGH);
digitalWrite( bPin, HIGH);
digitalWrite( cPin, HIGH);
digitalWrite( dPin, HIGH);
digitalWrite( ePin, LOW);
digitalWrite( fPin, HIGH);
digitalWrite( gPin, HIGH);
}

void zero()
{
digitalWrite( aPin, HIGH);
digitalWrite( bPin, HIGH);
digitalWrite( cPin, HIGH);
digitalWrite( dPin, HIGH);
digitalWrite( ePin, HIGH);
digitalWrite( fPin, HIGH);
digitalWrite( gPin, LOW);
}
Arduino 4 digit 7 segment display
_4x8_bit_numbers.rar843 bytes
 
 

Tag cloud

make build easy simple arduino making homemade solar laser printed portable cheap mini building custom cardboard wooden create super lego turn paracord chocolate your paper light intel