Hi Rob,
I am making some good progress with my ISR and to start with am printing the count on the serial monitor.
Have also got a 3 digit common cathode display wired to arduino Mega 2560 and the code to count upto 0-999-0
therefore am wondering how do I call the counting code after the interrupts have occured so as to display the count/counter
(incrementing or decrementing) on the 3 digit seven segment display??
Much appreciated.
Steffano.