Hello I,m trying to build a chronograph just Using AVR 16 bit timer and interrupts .im using an ATmega8A running at 8Mhz with External crystal. I was using an Overflow interrupt to count seconds that should be 122 overflows per second at /1 prescaler . well look and see if you can see my problems it…

Cant figure out what Im doing wrong here

system October 12, 2017, 7:52pm 4

I,m trying to build a chronograph

It's very easy to use the input capture of timer 1

Have a look at Nick Gammon's own forum for useful examples.

Topic		Replies	Views
Should I outsource my counting to something external? Micros is too slow. General Guidance	56	14921	May 5, 2021
Interrupt Juggling for my Chornograph Programming	21	5623	May 5, 2021
Simultaneous use of timer and input pin interrupts Programming	7	5080	May 5, 2021
velocity measuring chronograph Syntax & Programs	14	12245	May 6, 2021
any timer/interrupt experts? Syntax & Programs	3	1705	May 6, 2021