Name that cap...
Gordon JC Pearce
gordon at gjcp.net
Sat Mar 12 02:03:28 CST 2005
Tony Duell wrote:
>>Well - the spec for the LS121 is pretty well-known. Someone with more
> IIRC, the pulse width is something like 0.7*R*C
>>caffeine and inclination than I might well look up the datasheet and
>>work out what the value ought to be. It looks like it says "270"
>>overscribbled with "220" to me - what units I don't know. Try 220nF.
>>If that doesn't work, try 220pF. You'll be in the ballpark with one of
> Assuming R is within the recomended range for the IC, you are not going
> to get a 5.5us pulse (which sounds about right) with a 270nF cap. 270pF
> could well be right.
Yeah. Brain fart, brought on by lack of decent caffeine.
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