1271dc16_VR___Zak_s_Electronics_Blog_____Arduino_millis__
[Clock] 20MHz [This library (TIMER0)] Looses 1.6ms each second (0.16% error) [This library (TIMER1)] No error [This library (TIMER2)] Looses 1.6ms each second (0.16% error) [Arduino millis()] 
No error
N o e r r o r
U p d a t e s e v e r y 2 m s
U p d a t e s e v e r y 4 m s
U p d a t e s e v e r y 8 m s
U p d a t e s e v e r y 1 6 m s
Millisecond tracking library for AVR » Zak's Electronics Blog ~*
Arduino millis()