Unusual functions of cheap parts
Jim Thompson skrev:
On Fri, 25 Nov 2005 22:13:38 -0500, Phil Hobbs
wrote:
Si Ballenger wrote:
I would put a 100 watt lamp in series thereby limiting the current. I
would shave the ends down to points so they heated up rapidly. I put
them into a hollowed out fire brick and made a cheap furnace. Of course
don't look at it; it's like looking at the sun.
The current limiter I saw used a glass pie pan with pieces copper
metal on each side with salty water as the electrolyte. It would
start to steam some when in operation. The furnace was a small
clay flower pot with holes in each side with the carbon rods
sticking inside until they touched.
As a boy, I used an electric teakettle as a ballast for a two-D-cell carbon
arc lamp--worked great.
Cheers,
Phil Hobbs
I've used a light bulb in series with a rectifier to charge a car
battery (just make sure that line ground goes to chassis ground ;-)
I've seen several speakers where there was a light bulb, in series with
the tweeter, as a power limiter
-Lasse
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