[simpits-tech] RC Timer delay

[Rod Dale]

Hi Stig,
Try microFarads (C) and kilohms (R) , this will give an answer in milliseconds.
Rod

At 10:53 PM 2/21/02 +0100, you wrote:
>Hi Gang,
>
>I need some help here. I need to calculate the time for RC (resistor
>-Capitor) delay circut. I know the formula is t = r*c, but what are the
>units?
>
>more specific, consider the following :
>
>strobe----|
>         __|__
>          cap
>         _____
>           |
>           |----- out
>           |
>          | |
>          |r|
>          |_|
>           |
>gnd-------|
>
>
>when stobe goes high, out will go high almost at the same time, but what
>should the walues (r and c) be for out to go low, say 5 ms after strobe
>drops to low again?
>
>/Stig
>
>
>
>
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