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555 Monostable Calculator

This calculator calulates the resistor/capacitor combination that gives you a pulse closest to the desired time.
As a rule of thumb, it is best to choose resistor values above 1K and below 1Meg. Large electrolytics should be avoided in favour of large value R's to reduce power consumption and timing inaccuracies due to leakage.
Desired Pulse Duration:
Resistor EIA E-Series:
   
 
Disclaimer:The figures returned by this calculator are to be taken as a guide only. I will not be held responsible for any mishap or loss, either direct or consequential, that may occur as a result of relying on the figures herein.