4 Sep
2006
4 Sep
'06
2:37 p.m.
--- Tony Duell <ard at p850ug1.demon.co.uk> wrote:
> My father built himself a board which was simila
r
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.
Another useful limiter (to repleace (3) in your
setup is a 1000W tungsten
halogen bulb (e.g. one of those 'security lamps'.
They're pretty cheap
now).
> snip <<
-tony
Tungsten bulbs cheap??!!!!
The ones we have to buy for equipment at
our lab cost like ?500 (GBP).
Regards,
Andrew B
aliensrcooluk at yahoo.co.uk
4 Sep
4 Sep
4:23 p.m.
> Another useful limiter (to repleace (3) in your
> setup is a 1000W tungsten=20
> halogen bulb (e.g. one of those 'security lamps'.
> They're pretty cheap=20
Tungsten bulbs cheap??!!!!
The ones we have to buy for equipment at
our lab cost like =A3500 (GBP).
It depends on the bulb.
I've seen those sercurity lamps, including one bulb, sell for under 5
quid. Remvoe the pasive IR module (and raid it for components ;-)), the
rest of the lamp makes in ideal current limiter for larger stuff. And the
replacement bulbs are available for a few pounds...
YEs, there are expensive bulbs around (the 10kQ TV studio ones, some the
metal halide arc lamps used in video projectors, etc).
-tony
6684
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