Gedon:
Just a Quick Question about Arduino...
If i'm using PIN 2 as Interrupt pin, does the required voltage, being above 3V is HIGH and below 3V is LOW, still a necessity?
Hi
I'm not at all sure of the 3V value you're quoting here. Unless I'm reading the datasheet incorrectly (which is a possibility, granted), when VCC is in the range 2.4V - 5.5V, the highest value where the pin is guaranteed to be read as low is 0.3V and the lowest value where the pin is guaranteed to be read as high is 0.6V. (this is from Page 313, section "28.2 DC Characteristics").
The interrupt section of the datasheet does not list alternative voltages for low and high so I expect the same rules apply, though others will have greater experience in this area.
Cheers ! Geoff