Triangle wave 555 issues - tip not sharp enough

Alec_t said:

As has been said, you probably don't need a perfectly shaped triangle wave (for PWM control for your purpose).
For a perfect triangle wave, the width of each peak in the waveform varies linearly with height above base.
Now consider a very imperfect 'triangle' wave, as below:

Here's a plot of the positive-going peak widths (in microseconds) for each of the heights shown in blue:

As you can see, it's not quite a linear variation of width with height, but it's not far off and should be close enough for good PWM control in many applications, such as speed control.

Click to expand...