I've been trying to make a PWM circuit, i've made the astable circuit fine but im really struggling to get a certain duty time with the resistors. I want it to be variable but best values I can get is to change from 54% and 83% where as I want it to be adjustable between like 20% to 80%. I don't know how the resistor values would get it me I've tried plucking in values in the formulas without success
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