On Mon, 5 Aug 2002 19:25:02 +0200 =?iso-8859-1?Q?=C5ke_Neehr?=
<ake.neehr@TELIA.COM> writes:
> Hello!
>
> I need help with the calculation
> of the time of charge and discharge
> for a BackUp capacitor 0,1 uF 5,5 V
>

        Well, you can start with I=C dv/dt , which becomes dv/dt = I/C . So, if
you draw 1uA from the 0.1F capacitor, the voltage will drop at 10e-6
volts per second, or 100,000 seconds per volt.

Harold


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