I need some help. I have an Arduino Mega and I need this micro to be constantly reading from an ultrasound sensor. The problem is that I want to read from a temperature sensor once per hour. I have done some numbers with the TIMER1, but I am only alowed to throw an interrupt if it is less than 4,19 secons with a 1024 prescaler, because the timer1 has only 16 bits. Therefore, I think using the interrupts are not the best way to do this. Any solution?