555 Timer Calculator

timer Enter values in two of the boxes below left and press the 'Calculate' button to work out the third value. I've deliberately left it with the results 'un-rounded' so you can decide the component tolerance required yourself.
Time Delay  mSec
R1          KOhms
C1          uF
(c) Copyright G4VWL 2003.
If this calculator mysteriously appears on an obscure website in the States with the date and copyright information changed, remember, you saw it here first! :-)
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