Project I - 2. Counter with 7 Segment Based on Arduino

Counter with 7 Segment

How this system works is to calculate the amount of input and data expenditure. The input data is obtained from keystrokes UP, while the DOWN key is used for data counter reduction.

This tool consists of Arduino UNO as the main system & controller of the system. Up button as the number of data counter counters while the DOWN button to reduce the contents of the counter. While 7-Segment is used for display counter.

Hardware Requirement

Arduino Uno Board
4 Digit of 7-Segment with Common Anode
3 Push Button
Power supply +5 Volt
Jumper

7-Segment | Source

Block Diagram

Schematic

7-Segment CA Wiring | Source

Arduino - 7 Segment Wiring

Source Code/Sketch

unsigned int count;
int segA = 2;
int segB = 3;
int segC = 4;
int segD = 5;
int segE = 6;
int segF = 7;
int segG = 8;
int dig1 = 9;
int dig2 = 10;
int dig3 = 11;
int dig4 = 12;
void setup() {
for(char i=2; i<13; i++){
pinMode(i,OUTPUT);
}
pinMode(A0,INPUT);
pinMode(A1,INPUT);
pinMode(A2,INPUT);
digitalWrite(A0,1);
digitalWrite(A1,1);
digitalWrite(A2,1);
}
void loop() {
char seg1 = int(count)/1000;
char seg2 = (int(count)%1000)/100;
char seg3 = (int(count)%100)/10;
char seg4 = (int(count)%100)%10;
if (count < 10){
seg1=10;
seg2=10;
seg3=10;
}
else if (count < 100){
seg1=10;
seg2=10;
}
else if (count < 1000){
seg1=10;
}
digitalWrite(12,1);
digitalWrite(9,0);
displaySeg(seg1);
delay(5);
digitalWrite(9,1);
digitalWrite(10,0);
displaySeg(seg2);
delay(5);
digitalWrite(10,1);
digitalWrite(11,0);
displaySeg(seg3);
delay(5);
digitalWrite(11,1);
digitalWrite(12,0);
displaySeg(seg4);
delay(5);
if (digitalRead(A0)==0 && count < 9999){
count++;
delay(200);
}
else if(digitalRead(A1)==0 && count != 0){
count--;
delay(200);
}
else if(digitalRead(A2)==0){
count=0;
}
}
void displaySeg(char segment){
switch (segment){
case 0: digitalWrite(segA,0);
digitalWrite(segB,0);
digitalWrite(segC,0);
digitalWrite(segD,0);
digitalWrite(segE,0);
digitalWrite(segF,0);
digitalWrite(segG,1);
break;
case 1: digitalWrite(segA,1);
digitalWrite(segB,0);
digitalWrite(segC,0);
digitalWrite(segD,1);
digitalWrite(segE,1);
digitalWrite(segF,1);
digitalWrite(segG,1);
break;
case 2: digitalWrite(segA,0);
digitalWrite(segB,0);
digitalWrite(segC,1);
digitalWrite(segD,0);
digitalWrite(segE,0);
digitalWrite(segF,1);
digitalWrite(segG,0);
break;
case 3: digitalWrite(segA,0);
digitalWrite(segB,0);
digitalWrite(segC,0);
digitalWrite(segD,0);
digitalWrite(segE,1);
digitalWrite(segF,1);
digitalWrite(segG,0);
break;
case 4: digitalWrite(segA,1);
digitalWrite(segB,0);
digitalWrite(segC,0);
digitalWrite(segD,1);
digitalWrite(segE,1);
digitalWrite(segF,0);
digitalWrite(segG,0);
break;
case 5: digitalWrite(segA,0);
digitalWrite(segB,1);
digitalWrite(segC,0);
digitalWrite(segD,0);
digitalWrite(segE,1);
digitalWrite(segF,0);
digitalWrite(segG,0);
break;
case 6: digitalWrite(segA,0);
digitalWrite(segB,1);
digitalWrite(segC,0);
digitalWrite(segD,0);
digitalWrite(segE,0);
digitalWrite(segF,0);
digitalWrite(segG,0);
break;
case 7: digitalWrite(segA,0);
digitalWrite(segB,0);
digitalWrite(segC,0);
digitalWrite(segD,1);
digitalWrite(segE,1);
digitalWrite(segF,1);
digitalWrite(segG,1);
break;
case 8: digitalWrite(segA,0);
digitalWrite(segB,0);
digitalWrite(segC,0);
digitalWrite(segD,0);
digitalWrite(segE,0);
digitalWrite(segF,0);
digitalWrite(segG,0);
break;
case 9: digitalWrite(segA,0);
digitalWrite(segB,0);
digitalWrite(segC,0);
digitalWrite(segD,0);
digitalWrite(segE,1);
digitalWrite(segF,0);
digitalWrite(segG,0);
break;
case 10: digitalWrite(segA,1);
digitalWrite(segB,1);
digitalWrite(segC,1);
digitalWrite(segD,1);
digitalWrite(segE,1);
digitalWrite(segF,1);
digitalWrite(segG,1);
break;
}
}