hi there just looking into using a hall sensor on my arduino and came across this code below, i dont know if im being blind but where does it state which input pin its using? const int ledPin = 13; volatile int rpmcount; int sensorState = 0; unsigned int rpm; unsigned long timeold; void rpm_fun() …

what input pin is it using?

system January 18, 2013, 5:03pm 2

attachInterrupt(0, rpm_fun, FALLING);

Right there, pin 2.

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