Hello, I am trying to use the interrupts with the MEGA2560 and I find the different pins are acting inconsistent with the levels I am reading. When I boot up I read the voltage on interrupts 2(pin 21) and 3 (pin 20) at 5 volts, but the interrupts 0 (pin 2) and 1 (pin 3) read a low level, 0 volts. I…

Attaching interrupts to the MEGA2560

MarkT July 9, 2013, 11:55am 3

More to the point without knowing what you've connected to the various pins there's
no way to judge whether those values are as intended or not. Circuit please....

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Attaching interrupts to the MEGA2560

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