hi engineeeeering and friends
i searching for duty cycle control circuit
but i cant found

this is possible to change duty cycle without ferquency change

thanks

 

Is this for an automotive performance modification?

That's the primary use for duty cycle changers these days, to fool the car's fuel injection or ECU to make it give more fuel etc.

 

thanks RB
no this not automotive performance
just exam

 

Check Fig 18 of the Texas Instument datasheet for the NE555 timer IC.

 

This is a job for a monostable multivibrator.

 

This is a job for a monostable multivibrator.

Thanks mr
You can Explain more or give me circuit

 

Look up monostable multivibrator.

 

Check Fig 18 of the Texas Instument datasheet for the NE555 timer IC.

fig 18 is:

 

Setup the delay time of NE555 less than T(=1/Freq) of your Fin(input frequency).

 

fig 18 is:

Must be a different revision of the datasheet. In mine, Fig 18 relates to PWM.

 

many thanks of all

 

nm...misunderstood question....