Hello All,
I am working on a project where I have to make a PWM generator (adjustable with a pot) using a 555 timer. What I need done is to create a circuit that keeps the output at 200hz while being able to adjust the duty cycle from 10% to 100% using a pot or rotary switch actually.
I'm relatively new with electronics. I've read the data sheet for the 555 and read up astable operation. So far from what I've come up with, adjusting resistor values will change both duty cycle and frequency. I need to be able to keep the frequency stable at around 200 hz, while changing the duty cycle. Also, another problem with that is that, I can't calculate it to get below 50% duty cycle for some reason.
Does anyone have any recommendations? I am not very creative with this.
Thanks a lot
I am working on a project where I have to make a PWM generator (adjustable with a pot) using a 555 timer. What I need done is to create a circuit that keeps the output at 200hz while being able to adjust the duty cycle from 10% to 100% using a pot or rotary switch actually.
I'm relatively new with electronics. I've read the data sheet for the 555 and read up astable operation. So far from what I've come up with, adjusting resistor values will change both duty cycle and frequency. I need to be able to keep the frequency stable at around 200 hz, while changing the duty cycle. Also, another problem with that is that, I can't calculate it to get below 50% duty cycle for some reason.
Does anyone have any recommendations? I am not very creative with this.
Thanks a lot