/diy/ - Do It Yourself

>>1462387
Personally I'd use a DIP-8 dual comparator and make PWM with that instead. Make an onp-amp-style oscillator with one comparator, feed its capacitor ramp "triangle wave" back into its second comparator, with a resistor divider feeding a voltage into the other pin of the second comparator. Probably more passives than the 555 PWM, but it doesn't change the frequency with the duty cycle. You can also tune the ramp wave to be a lower amplitude and more triangular, if you require. Oh but you'll need a ground rail for the thing to oscillate on either side of, which might be a pain. It's actually not a better circuit at all.