throwaway voltage runtime set and forget timer

asdf.ino

// simple voltage babysitter. hook up eg battery or a dcdc output to d7 to get total minutes
// it was digital high. this is useful to see effective runtime of a battery fed boost buck system etc
#define BAT_PIN (7)
#define DEGLITCH (5)

static unsigned int on_minutes = 0;
static unsigned char c = 0;

void setup() {
  Serial.begin(9600);
  pinMode(BAT_PIN, INPUT);
}

void loop() {
  for (int i = 0; i < DEGLITCH; ++i) {
    if (digitalRead(BAT_PIN)) {
      ++c;
    }
  }
  
  if (c >= DEGLITCH) {
    ++on_minutes;
  }
  c = 0;  

  Serial.print(F("on minutes: "));
  Serial.print(on_minutes, DEC);
  Serial.print(F("\r\n"));
  delay(59999); // one minute
}