// Staccato controller for Vacuum Tube Tesla Coil (VTTC)
// Ver 1
// 1.9.2023 - Kaj Luukko

const int pinAC = A1;         // 50 Hz half wave input pin A1
const int potInterval = A2;   // Potentiometer for intervall pin A2
const int potLenght = A3;     // Potentiometer for lenght pin A3
const int potDelay = A4;      // Potentiometer for delay pin A4
const int outPinTriac = 12;   // Digital out pin 12 for triac
const int outPinLED = 13;     // Digital out pin 13 for LED
const int inButton = 2;       // Push button input digital pin 2
int i = 0;

void setup() {
  pinMode(pinAC, INPUT);
  pinMode(potInterval, INPUT);
  pinMode(outPinTriac, OUTPUT);
  pinMode(outPinLED, OUTPUT);
  pinMode(inButton, INPUT);
  digitalWrite(outPinTriac, LOW);
  digitalWrite(outPinLED, LOW);
}

void loop() {
  while (analogRead(pinAC) < 15){}
    if (digitalRead(inButton) == HIGH) {
    fire();
    while (digitalRead(inButton) == HIGH) {}
  }
  i = i + 1;
  if ((i >= map(analogRead(potInterval),0,1020,50,0)) && (analogRead(potInterval) > 10)){
    fire();
    i = 0;
  }
  if (i > 0){
    while (analogRead(pinAC)>15){}
  }
}

void fire() {
  for (int ii=0; ii<map(analogRead(potLenght),0,1020,25,1); ii++) {
      delayMicroseconds(map(analogRead(potDelay),0,1020,0,9000));
      digitalWrite(outPinTriac, HIGH);
      digitalWrite(outPinLED, HIGH);
      delay(1);
      digitalWrite(outPinTriac, LOW);
      while (analogRead(pinAC) > 15){}
      digitalWrite(outPinLED, LOW);
      while (analogRead(pinAC) < 15){}  
      
  }
}