How to get 400 Hz PWM using 555 IC?

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400 Hz PWM using 55 5 ic
how can it made
 

Re: 400 Hz PWM using 55 5 ic

i can help you.but tell me the duty cycle range (minimum duty cycle % to maximu duty cycle %) for the PWM frequency 400HZ
 

Re: 400 Hz PWM using 55 5 ic

35-75% dutycycle.
my absolute requirement is to make 400hz clock to drive mosfet for inverter. i need two 400signal(on is inverted).while starting the frequency will gradually increses from low value to 400hz(for the safety of mosfet). thenafter it must be constant.in normal condition the duty cycle must be 50%.i have a voltage f/b.if the o/p goes to high then dutycycle need to be decrese and if o/p goes low ,it must be increased.
this is my 1st stage to make a 400hz clock
 

Re: 400 Hz PWM using 55 5 ic

duty 10-40%
 

**broken link removed**

and try find online, or google 555 free calculator design etc. A lot of info
 

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