[Noisebridge-discuss] computer PSU questions - is 5.5V normal for 5V?

[d p fenn]

travis+ml-noisebridge at subspacefield.org writes:

> On Sun, Aug 08, 2010 at 10:01:01PM -0400, Tymm Twillman wrote:
>
>> cheap supplies &/or bad capacitors will cause regulation problems.
>   but for most things, the voltages you're getting should be
>   fine... though i'm assuming the tester basically has a DMM rather
>   than a scope, so it's probably significantly worse -- as a
>   multimeter will generally average things out a bit.  A properly used
>   'scope will let you see a lot more information about just what's
>   going on.
>
> I'm using a special PSU tester with digital LCD readout

i think tymm's point was that a scope gives an idea of the 'time series'
rather than being 'more accurate' (usually digital scopes run in
'connected' mode where the samples are still interpolated for display,
and i don't think that older sweep scopes can do 'points' at all).

i think you're just going to see an ac component w/ your nominally dc
signal. that should be fine for most things as long as it is w/in some
region (low and high limits matter).

\p

---
Idealism increases in direct proportion to one's distance from the
problem. - John Galsworthy