On Sunday 03 September 2006 12:34 am, der Mouse wrote:
I built myself
a little box that uses a center-off DPDT switch to
select whether that light bulb is inline with the outlet in the box
or not.
My father built himself a board which was similar but more elaborate:
he could select among (1) a small (7.5W?) light bulb, (2) a large
(100W?) light bulb, (3) a high-wattage heating element that was still
under the breaker trip current for that mains circuit (an iron, I
think), or (4) no limiter at all.
If I did much work where such a thing were useful, I probably would
have put together something similar myself. :-)
Actually mine is a bit more elaborate as well -- it's in the same box with a
variac, and there's a switch to select whether the "normal" or
"boost"
voltage is used, as well as a double-pole power switch -- when that one's
off I *know* that both sides of the power line are disconnected from the unit
under test.
The bulb I'm using is a 40W, which is too small for some stuff, so I really
probably should add another bulb and an option to switch it in or out.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
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Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin