Rocket launch

Today we are going to attempt to build a rocket launch system with the arduino.  Expect some pictures soon!

Code

There is a new variable invert added in.  This means that the 7 segment can be active high or active low, if turning the segment high turns it on on turning it low turns it on.

int a = 3;
int b = 4;
int c = 5;
int d = 6;
int e = 7;
int f = 8;
int g = 9;
int seg_one = 13;
int seg_two = 12;
int seg_three = 11;
int seg_four = 10;

int pot = A0;
int button = A1;

int led = 1;

int time;

boolean invert = false;


void setup(){
    pinMode(a, OUTPUT);
    pinMode(b, OUTPUT);
    pinMode(c, OUTPUT);
    pinMode(d, OUTPUT);
    pinMode(e, OUTPUT);
    pinMode(f, OUTPUT);
    pinMode(g, OUTPUT);
   
}

void loop(){
  int tmp = analogRead(pot);
  time = tmp * 30 / 1024;
  show(time);
  if(digitalRead(button)) countDown(time);

}

void countDown(int counter){
  for(int i=counter;i>0;i--){
    for (int j=0; j<2000; j++) show(i);
  }
  digitalWrite(led,HIGH);
  delay(1000);
  digitalWrite(led,LOW);
}

void show(int num){
  int unit = num % 10;
  int tens = (num / 10) % 10;
  int hundreds = (num / 100) % 10;
  int thousands = (num / 1000) % 10;
  displayNumber(unit,3);
  delayMicroseconds(1250);
  displayNumber(tens,2);
  delayMicroseconds(1250);
  displayNumber(hundreds,1);
  delayMicroseconds(1250);
  displayNumber(thousands,0);
  delayMicroseconds(1250);
}

void displayNumber(int segment, int val){
  switch(segment){
    case 0: digitalWrite(seg_one,invert);
            digitalWrite(seg_two,!invert);
            digitalWrite(seg_three,!invert);
            digitalWrite(seg_four,!invert);
            break;
    case 1: digitalWrite(seg_one,!invert);
            digitalWrite(seg_two,invert);
            digitalWrite(seg_three,!invert);
            digitalWrite(seg_four,!invert);
            break;
    case 2: digitalWrite(seg_one,!invert);
            digitalWrite(seg_two,!invert);
            digitalWrite(seg_three,invert);
            digitalWrite(seg_four,!invert);
            break;
    case 3: digitalWrite(seg_one,!invert);
            digitalWrite(seg_two,!invert);
            digitalWrite(seg_three,!invert);
            digitalWrite(seg_four,invert);
            break;
    default:digitalWrite(seg_one,!invert);
            digitalWrite(seg_two,!invert);
            digitalWrite(seg_three,!invert);
            digitalWrite(seg_four,!invert);
            break;
  }
  digitSelect(val);
}


void digitSelect(int num){
  switch(num){
    case 0: zero();
            break;
    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;
            
}
}
  
  
void zero(){
  digitalWrite(a,!invert);
  digitalWrite(b,!invert);
  digitalWrite(c,!invert);
  digitalWrite(d,!invert);
  digitalWrite(e,!invert);
  digitalWrite(f,!invert);
  digitalWrite(g,invert);
}

void one(){
  digitalWrite(a,invert);
  digitalWrite(b,!invert);
  digitalWrite(c,!invert);
  digitalWrite(d,invert);
  digitalWrite(e,invert);
  digitalWrite(f,invert);
  digitalWrite(g,invert);
}

void two(){
  digitalWrite(a,!invert);
  digitalWrite(b,!invert);
  digitalWrite(c,invert);
  digitalWrite(d,!invert);
  digitalWrite(e,!invert);
  digitalWrite(f,invert);
  digitalWrite(g,!invert);
}

void three(){
  digitalWrite(a,!invert);
  digitalWrite(b,!invert);
  digitalWrite(c,!invert);
  digitalWrite(d,!invert);
  digitalWrite(e,invert);
  digitalWrite(f,invert);
  digitalWrite(g,!invert);
}

void four(){
  digitalWrite(a,invert);
  digitalWrite(b,!invert);
  digitalWrite(c,!invert);
  digitalWrite(d,invert);
  digitalWrite(e,invert);
  digitalWrite(f,!invert);
  digitalWrite(g,!invert);
}

void five(){
  digitalWrite(a,!invert);
  digitalWrite(b,invert);
  digitalWrite(c,!invert);
  digitalWrite(d,!invert);
  digitalWrite(e,invert);
  digitalWrite(f,!invert);
  digitalWrite(g,!invert);

}

void six(){
  digitalWrite(a,!invert);
  digitalWrite(b,invert);
  digitalWrite(c,!invert);
  digitalWrite(d,!invert);
  digitalWrite(e,!invert);
  digitalWrite(f,!invert);
  digitalWrite(g,!invert);
}

void seven(){
  digitalWrite(a,!invert);
  digitalWrite(b,!invert);
  digitalWrite(c,!invert);
  digitalWrite(d,invert);
  digitalWrite(e,invert);
  digitalWrite(f,invert);
  digitalWrite(g,invert);
}

void eight(){
  digitalWrite(a,!invert);
  digitalWrite(b,!invert);
  digitalWrite(c,!invert);
  digitalWrite(d,!invert);
  digitalWrite(e,!invert);
  digitalWrite(f,!invert);
  digitalWrite(g,!invert);
}

void nine(){
  digitalWrite(a,!invert);
  digitalWrite(b,!invert);
  digitalWrite(c,!invert);
  digitalWrite(d,!invert);
  digitalWrite(e,invert);
  digitalWrite(f,!invert);
  digitalWrite(g,!invert);
}