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November 29th 05, 12:40 AM
posted to de.sci.electronics,rec.radio.amateur.homebrew,sci.electronics.components,sci.electronics.design
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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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