fungus:
Tiny85 doesn't have the same timers as a Mega328.Look for TCCR1 in the datasheet.
I read datasheet and some other topics with changing PWM frequency but i don't understand it correctly..
Since ATtiny85 have 2 PWM outputs (PB0 and PB1) it probably have one PWM timer (TCCR1). This timer has two output compare registers that control the PWM (TCCR0A and TCCR0B).. Is that correct?
From Arduino Playground - TimerPWMCheatsheet playground i can understand that i should set correct settings for wanted frequency.
If i would like to set PWM frequency on this two PWM ports (PB0 and PB1) to around 30 kHz (i would like to drive fans and don't want too much noise because of PWM) i should write this lines in void setup.
TCCR0A = TCCR0A & 0b11111000 | 0x01; <-- for PB0
TCCR0B = TCCR0B & 0b11111000 | 0x01; <-- for PB1
Because i am using internal CPU clock with 8 MHz, i will get around 15 kHz with this setting, not 30 kHz.
Is that correct? Also, is possible to get 30 kHz with internal 8 MHz clock? I would realy like to understand this settings.