Confused dude, and by orders of magnitude, dude

[Gene Zumchak]

Bill,

    That's correct.  What you are talking about is the curve that describes a
resistor charging a capacitor.  The equation is  Vc = V(1 - e^-t/RC).  For t =
one time constant, the equation give .632 times the applied voltage.

    For a full charge, it takes an infinite time, or the end of the world,
whichever comes first.  (Actually, the end of the world is coming in about nine
more months, so we all ought to be prepared).

Gene Z.



Bill Layer wrote:

> Hi Terry, All,
>
> Something came to mind.
>
> >As a mental reminder, the time constant for a one meg resistor connected to
> >a one uF capacitor is one second, frequency is 1/6 Hz.
>
> With respect to T=R*C, isn't this the time required for the cap to reach a
> certain percentage of the rail, like 60% or somesuch? If memory serves,
> there is a different and slightly more complex formula for a 'full' charge...
>
> Or was I sleeping that day?
>
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> |      "The" Bill Layer - Frogtown, Minnesota. U.S.A.      |
> | Vacuum tubes, Analog, Motorcycles and Other Alternatives |
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