LED thermal inefficiency: about 80% of the energy that goes into an LED is converted into heat Halogen bulb luminous efficiency: about 30 lumens/W LED luminous efficiency: about 80 lumens/W, after all factors are taken into account
#OVERHEAD PROJECTOR DIY PORTABLE#
Posted in Portable Video Hacks Tagged diy hd projector, diy projector, homemade projector Post navigation Oh and if you’re looking for a 3D HD projector… we’ve also got you covered. Now all he has to do is replace the expensive(?) halogen light bulb with a high powered LED instead! The beauty with a system like this is you can get high definition out of a relatively small and cheap LCD panel! The only thing is it won’t last forever - LCDs (especially monitor LCDs) aren’t designed to pass through that much light.ĭon’t believe us? Check out the following video. The hardest part was taking apart the monitor - the overhead projector and mounted lens took care of the rest. Putting two and two together he took apart the LCD, laid the bare screen on top of the glass and, well, that’s it! It’s seriously that simple. Anyway, he also had an old LCD monitor sitting around gathering dust… It’s all about reuse and keeping useful things out of the landfills. Freecycle is a great grassroots network, kind of like Kijiji or Craigslist - but everything is free. He started by picking up an old overhead projector off of Freecycle. Need a high definition projector? Don’t have a thousand bucks sitting around? Then this hack is for you! threw together this awesome HD projector, and it cost him absolutely nothing to build!
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