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);…

Voltage on pin12.

CrossRoads September 6, 2011, 5:46pm 5

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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Voltage on pin12.

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