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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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A couple of months ago I had an idea for a very compact but efficient
pocket flashlight. The idea was to use an offset-fed parabolic reflector (like satellite TV) rather than the traditional flashlight design. Computer models indicated it would work well. Then I got sidetracked on other things. I've revisited that with a quick 'n dirty experiment. It seems to work on the bench as well as in the 'puter. More at http://users.goldengate.net/~dforeman/tinylight/ |
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