Hello everyone, first time to the forum, but I need help!
I'd like to design in hardware a static frequency variable duty PWM generator and running into some issues. My current design consists of a 555 timer configured in astable operation generating a 50% duty 150Hz square wave which is driving the trigger on another 555 timer configured for for monostable operation. I understand that I can vary the duty this way using a pot. Ok, onto my constraints...
I am required to use 3 potentiometers; 1 to set the lower duty cycle limit, 1 to set the upper duty cycle limit, and 1 to vary the duty between the 2 limits. I know i could easily accomplish this using a micro, but I am trying to have everything in hardware. No code.
Any suggestions?
Thanks