Converting transparency sheets to an LCD monitor

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Apparently, there's some sort of sporting event being televised this weekend that has been historically used as an excuse to buy a big-screen TV. [Joel] wanted a huge-screen TV on the cheap, so he converted an overhead projector to something he can use with his XBox. Using a bare LCD panel with an overhead projector is a decades-old hack we've covered before. The basic idea is fairly simple, … [Read more...]

Roll your own capacitors – high voltage edition

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[Grenadier] tipped us off about his method for building your own high-voltage capacitors. He thought the paper and foil capacitor project was a nice introduction to the concepts, but at the same time he knew he could produce a much more powerful device. For the dielectric he is using acetate film. This is the material from which overhead transparency sheets are made. He stuck with aluminum foil … [Read more...]