In arduino, PWM frequency is 500 hz and 980 hz.......in my application i want 2000 or 3000 hz frequency.can i increase this frequency or any alternative for that?
Unfortunately you can't choose every frequency, but you can set pwm pins to higher frequencies.
That's a bit complicated. It looks like that would require a piece of paper and a calculator and some time. Obviously it is doable but is there a premade Table somewhere that a person can refer to see all the possible combinations on one screen ?