Digsy Posted April 21, 2005 Share Posted April 21, 2005 If you know your electronics then you know that for a capacitor © charging through a resistor ® the charge voltage will reach 63.2% of the applied voltage after 1 time constant. The time constant being equal to R x C. Does anyone know how many time constants must pass before the capacitor can be considered to be fully charged? TIA. Link to comment Share on other sites More sharing options...
merckx Posted April 21, 2005 Share Posted April 21, 2005 Mathematically speaking it can never be considered fully charged, but it will get very close! It will take an infinite ammount of time! Here's a nice graph and table showing charge voltage plotted against RC. http://www.kpsec.freeuk.com/capacit.htm Link to comment Share on other sites More sharing options...
Digsy Posted April 22, 2005 Author Share Posted April 22, 2005 Yeah I know it wont ever fully charge. Looks like anything above 3 time constants will do for me. Cheers for the link Link to comment Share on other sites More sharing options...
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