Slashdot Mirror
DIY Projector Plans Released
vroom writes "Lumenlab, a rapidly-growing website dedicated to the art of building LCD projectors, has just released its guide on how to build your own projector. The guide used to sell for $19.99, along with entrance to the "Premium Forums," where like-minded DIYers work together to constantly push this obsession forward. Not sure if building your own LCD projector is for you? Not a problem anymore. Just download the official torrent file of the guide and you're good to go. If you want to roam with the others in the Premium Forums, however, you'll still need to buy a membership."
Further investigation into the forums (which I originally assumed were 100% locked to guests, which proved not to be correct) led to this:
c =2898&st=40
http://www.lumenlab.com/forums/index.php?showtopi
So it does indeed look legit. Surprised they don't have something a little more visible regarding the announcement, though.
Hardly "Just released" ! My personal copy of the lumenlab guide
says "Copyright lumenlab.com 2003-2004".
BTW It is a good guide, but the same information can be collected elsewhere.
http://izzotek.com/index.php?lang=en
http://www.diyprojectorcompany.com/
http://www.diybeamer.ch/portal/index.php (German, Ahh es macht so gut..)
http://www.gadaffy.ch.vu/
http://www.gwidijanto.fcpages.com/index.htm
Yet buying the guide allows access to the forums, which by itself is worth the price.
It's a lot of work, there is some risk involved, and there are areas that don't come close to a commercial projector. Commercial projectors can pump out a lot more light than a diy pj... but the catch is that their bulbs are rated for only a few thousand hours and cost many hundreds of dollars to replace. Spending half the cost of your projector every year or so to replace the bulb, doesn't sound like much fun to me. Or you could keep it in it's box and only use it once a year to conserve the bulb... but then you're not getting your money's worth then either.
:)
:D
DIY pj's use metal halide HID lamps that last for upwards of *twenty thousand hours* and cost anywhere between $50 and $150 each. Have the thing on all day every day if you want
And there's no understating the worth of boggling the minds of your friends and family when you tell them you made it yourself
The three things you want in an ideal projection lamp are
a) very high light output
b) very short arc length
c) very even colour spectrum
The reason b) is important is because the projection optics rely on having a point-light source. Light that's generated only a few mm off the focal point of the first lens doesn't follow the correct path through the optics and gets wasted (or pollutes the light that is going the right way, causing a blurry, washed out image.) Add a) and b) and you get a lot of heat in a very, very small space. Manufacturing a bulb that can do a and b and doesn't explode as soon as it's lit is hard. Add c and things are even harder.
I'm sure bulb manufacturers make a reasonable profit off their bulbs, but they aren't deliberately limiting the lifespan of these bulbs for the hell of it - it's just you only get two out of "cheap", "good" and "long-lived".
I know that many of you will belive this to be a scam just as I did when me and a friend found it about 2 years ago. I plunked down the 20 bux at the time and then started reading the protected forums looking at the different ideas. After a month or so of gathering a list of things that I should get( basically what was most popular with many of the other builders) I decided that I would give it a shot and see if I could actually make it work. The build process was not very hard at all. I took my time building and measuring everything in about 2 weeks. When I first turned the projector on, I was waiting for it to not work and me to look like a fool to my wife. Much to her and my surprise the first projected images of Shrek where absolutley jaw dropping. Now, when ever we have a party or gathering at the house, everyone always wants to check out the gaming/movie projector as I sit there with a smug look on my face saying "Yea I built that for under 500 bux" Anyhow, here is a link to my finished working projector that has been running for over 1.5 years and is still great. http://www.lumenlab.com/forums/index.php?showtopic =1576
If you truely want a home theater, do not just blow this off as a scam. Putting a TV in a cardboard box to get a 120" picture that is crystal clear and high definition is a scam. This is true science. And you will be very pleased with what you come up with after you are finished with your DIY projector.