/*
  Arduino Forum
  Topics:       Triggering 5 millisecond pulses part #1
  Category:     Using Arduino
  SubCategory:  Programming Questions
  Link:         https://forum.arduino.cc/t/triggering-5-millisecond-pulses-part-1/1135999/85
*/

#define ainPin A0

#define compareVoltage 2.0f
#define pulseTime 50ul
#define hiAmplitude 6
#define loAmplitude 1

float input_voltage;
uint32_t pulseStartAtMs;
bool inPulse;
uint8_t Millis ;

void setup() {
  Serial.begin(115200);
  input_voltage = 0.0f;
  inPulse = false;
}

void loop() {
  int analog_value = analogRead(ainPin);
  float prevInputVoltage = input_voltage;
  input_voltage = (analog_value * 5.0) / 1023.0f;

  if (prevInputVoltage < compareVoltage && input_voltage >= compareVoltage) {
    Millis = hiAmplitude;
    inPulse = true ;
    pulseStartAtMs = millis() ;
  }

  if (inPulse && millis() - pulseStartAtMs >= pulseTime) {
    inPulse = false ;
    Millis = loAmplitude;
  }

  Serial.println(
    "Input:= " + String(input_voltage, 2)
    + ", Millis:= " + String(Millis)
    + ", Compare Voltage:= " + String(compareVoltage, 2)
  );
}