atmega 8 to produce pwm

[mahmoud]

how to program atmega 8 to generate pwm with a frequency 100khz by subtracting ramp and  Vref and compare them to drive mosfet of dc-dc converter , where Vref is input for the atmega and the ramp is internally generated

[ankurmm]

Hi, mahmoud 
In Atmega8 you can get PWM output  by  programming TimerX (0,1,2) in Fast PWM mode, phase correct PWM mode and Phase and freq. corrrect mode. In ATmega8 datasheet sample code is given on TimerX. On Youtube seacrh humanHardDrive for video tutorial.  

[Ashutosh Bhatt]

in ATmega controllers generating PWM using fast PWM method is easy. for setting frequency you have to divide clock frequency by desire factor. during this time period the ramp increases from min (0) to max (256).

 

[AJISH ALFRED]

Hi Mahmoud,

Please find this link

http://www.engineersgarage.com/embedded/arduino/variable-frequency-sine-wave-generation-using-arduino

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