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Topic: Voltage on pin12. (Read 665 times) previous topic - next topic

black_13

I have an Arduino Mega 2560 is the voltage on the this pin 12 I perform the following:

void setup() {               
  // initialize the digital pin as an output.
  // Pin 13 has an LED connected on most Arduino boards:
  pinMode(12, OUTPUT);     
}

void loop() {
  digitalWrite(12, HIGH);   // set the LED on
  delay(1000);              // wait for a second
  digitalWrite(12, LOW);    // set the LED off
  delay(1000);              // wait for a second
}

Regards.
James

Noorman

Can you refrase the question?
It is not clear what you mean (at least to me)

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black_13

Are the voltages on the PWM pins (13,12) at 5 volts on the Arduino Mega 2560?

James C4S

Quote
Are the voltages on the PWM pins (13,12) at 5 volts on the Arduino Mega 2560?

All I/O pins are at (or near) VCC.  Since the Mega 2560 is running 5V, the I/O pins will be 5V.
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CrossRoads

If the LED is across pin 12 & Gnd with no current limit resistor - while pin 13 has a series resistor with the LED - the output pin 12 may have been damaged, and no longer outputting 5V.
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