Remember those boxes that you put infront of you TV and would project the screen up to a wall?
Did these use the same techniques here, just without much light? Or was it something else?
Just thinking of those and thought they where interesting (and might do for a project)...
oh... another question... Could you use a slightly modified version of those box's to fix keystoning?
Thanks
Did these use the same techniques here, just without much light? Or was it something else?
Just thinking of those and thought they where interesting (and might do for a project)...
oh... another question... Could you use a slightly modified version of those box's to fix keystoning?
Thanks
If you have a quick look at http://www.diyaudio.com/forums/showthread.php?s=&threadid=68134 you can have a look at the DIY CRT Projectors
DIY LCD Projectors use essentially the same techniques except they use a lens to project the image
With a DIY CRT PJ you are using the fresenel to project the image which is why it ends up looking awful!
Hope this answers your question
DIY LCD Projectors use essentially the same techniques except they use a lens to project the image
With a DIY CRT PJ you are using the fresenel to project the image which is why it ends up looking awful!
Hope this answers your question
Hackaday.com recently covered an article about the lumenlab.com DIY projector. The picture is actually better than commercial units and the whole setup is quite affordable, so long as you can afford to tank an LCD monitor and have some spare elbow grease. Basic instructions are free, but if you want detailed help via the Lumenlab forums be prepared to pay $20
http://www.hackaday.com/entry/1234000260071741/
http://www.lumenlab.com
That's nice and all, but there's a cheaper way. I did this with an old laptop someone gave to me with a max 800x600 resolution and 16m colour. One "broken" donated overhead projector later and I was set. Total cost of the unit was $0.00 The bulbs are really rather cheap -- I've gone through 3 for about $11 each since Nov 2004, and I leave this thing on far more than I should. The eyesore aspect was fixed when I mounted it to the wall behind my couch about 4 feet up and built a nice little box for it. Added a pull-down screen in the middle of the ceiling and viola, it's not even in the way. Eventually, when I come across a REALLY cheap high res LCD I'll replace the paltry 800x600 screen, but for now I think the price is worth it.
http://www.denguru.com/2004/11/13/supersize_your_tv_for_/
http://www.hackaday.com/entry/1234000260071741/
http://www.lumenlab.com
That's nice and all, but there's a cheaper way. I did this with an old laptop someone gave to me with a max 800x600 resolution and 16m colour. One "broken" donated overhead projector later and I was set. Total cost of the unit was $0.00 The bulbs are really rather cheap -- I've gone through 3 for about $11 each since Nov 2004, and I leave this thing on far more than I should. The eyesore aspect was fixed when I mounted it to the wall behind my couch about 4 feet up and built a nice little box for it. Added a pull-down screen in the middle of the ceiling and viola, it's not even in the way. Eventually, when I come across a REALLY cheap high res LCD I'll replace the paltry 800x600 screen, but for now I think the price is worth it.
http://www.denguru.com/2004/11/13/supersize_your_tv_for_/
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