16 Nov
2004
16 Nov
'04
1:25 a.m.
> I, for example, have few suitable dummy loads at
hand. I have a
> load resistor which came form an old Sun (4 ohms), though I'm not
> sure whether it's between 5V and ground or 12V and ground - it I
> suspect the latter, since it looks more like 36W than 6??W. (It
> could even be between 5V and 12V from what I can tell, though that
> would be Weird.)
>
> I actually do not even have a reliable voltmeter, much less the
> properly working oscilloscope I'd want to check things like
> ripple.
Ed> Old disk drives, if they'll at least spin up, make good dummy
Ed> loads. The AC setting on a voltmeter will let you know if you
Ed> have too much ripple on a DC supply.
Depends on the voltmeter...
Actually, a resistor is a classic dummy load. They have the advantage
of being dirt cheap, and readily available in thousands of
variations. If Radio Shack doesn't hack it, Digikey certainly will.
Ok, it's not so easy for Ethan...
paul