J
Jim Thompson
- Jan 1, 1970
- 0
I suppose the more intelligent way to use that calculator is to enter
duty cycles that are arbitarily close to and above but not exactly equal
50%. Of course, you wouldn't know to do this if all you've ever done is
use calculators. Entering 50.3% , 1KHz, and C=0.001u, values obtained
with some fairly rough insight into 555 operation, returns RA=8.64K and
RB=716K- not std values according to my other formula derived
mysteriously from additional applications insight, almost as good as,
but a lot less fun than, the manual method.
Those of us who need a tight 50%... run oscillator at 2X frequency,
then div2.
...Jim Thompson