uneducated
New Member
I need an astable 555 timing circuit with adjustable duty cycle (from 10% to 90%) and also with an adjustable frequency. So far I have figured a circuit which allows me to do this in a way, but I have to adjust the on time and off time separately.
Take a look at the attached image and you can see two resistors (pots). Adjusting one of these will allow a longer/shorter on time, and the other a longer/shorter off time.
Is there a way that I can use one adjustment to adjust the duty cycle, and another adjustment for the frequency, but without affecting one another. eg. turn the frequency up without adjusting the duty cycle?
Take a look at the attached image and you can see two resistors (pots). Adjusting one of these will allow a longer/shorter on time, and the other a longer/shorter off time.
Is there a way that I can use one adjustment to adjust the duty cycle, and another adjustment for the frequency, but without affecting one another. eg. turn the frequency up without adjusting the duty cycle?