1602 LCD and reading out RPM fan

ProAce · May 17, 2014, 8:41am

A sorry, so I changed it:

int pin = A0;
unsigned long duration;

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

void loop()
{
  duration = pulseIn(pin, HIGH);
  Serial.println(duration);
}

And this came out at 12V 2200 rpm:

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1602 LCD and reading out RPM fan

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