Im using a tiny24 and trying to produce a steady time base (ideally seconds)
Im using the 127Khz internal oscillator to drive an LED via a register counting and comparing how many times the OCF0B flag goes high. This is pulsing my LED at a rate I can see with my eye.
However when i change the CS00,02 bits to alter the pre-scaller, the rate doesnt seem to change.
Is the pre-scaler only for the internal 8MHz resonator or am I seeing flickering harmonics of the base frequency divided or something like that...?
Am I missing something simple?