Serial.print and interrupts problem

jamesvote:
Basic rule with serial:
Divide BPS by 10 gives how bytes per sec, divide this into 1 and that is how long it takes to send a byte...
EG 9600bps = 960 into 1 = approx 0.001sec to send 1 byte
Your "tick" is 7200/60 into 1 = 0.009sec
Suggest to start with, change serial to as high as you can go (115k?) this will give you more time between data being sent to next tick

Hey thanks for answering! I really didn't know that about Serial.println, definitely I'm going to check it out and give it a try.

Thanks again!