Hi, does anyone know how I could get a 555 timer to operate in astable mode at a 50% duty cycle? All the circuits I've seen are always for greater than 50%. thanks.
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16 years ago
555 timer with 50% duty cycle question
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- posted
16 years ago
It's easy with the CMOS version of the 555 timer...
Tie Threshold and Trigger together, capacitor to ground from this node, likewise a resistor to output... voila, 50%.
...Jim Thompson
-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et |
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16 years ago
On 27/12/2006 the venerable panfilero etched in runes:
Yes. Go here:
formatting link
and download the data sheet. Look at page 10 (figure 14). IT shows you exactly how to do it.
GIYF.
-- John B
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16 years ago
You go to sci.electronics.basics where this sort of question belongs, and you look for the answers to your post asking the very same thing there.
Michael
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16 years ago
While there are ways to get close with feedback, one can get closer with a flip/flop set to toggle. With two flip/flops, you can get four phases of quadrature output. The '555 has to run at 2 or 4 times the desired output frequency, though.