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555 Timer A-stable Oscillator Circuit permalink to this solution

Cycle Time
Time High
Time Low
Duty Cycle
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About this Page

The 555 timer chip has been around since the 70s, so does the world really need another website for calculating the circuit values?

No! But I made one anyway … it's largely an excuse to play around with HTML5 canvas and coffeescript! All the source code for this page is on GitHub.

For an example of a 555 circuit hooked up with Arduino and Processing, check out AstableOscillator and Monostable, from the LittleArduinoProjects collection.

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