Well the plan is to make a large boxed projector much like the onces found at lumen labs. But for the light source I want to use a 575w metal halide bulb and ballast. After I found out my order of fresnels from diyprojectorcompany was backorderd, I got too antsy and put my stripped monitor ontop of the Elmo a305sd. I recieved it from inventorySoultions after the Dukane 670 they sent me had a broken mast. Now I have two light sources and optics to trade in and out when I build my projector.
My lcd pannel I originally got for free, it's a crappy kogi (gVision) 15" that had the backlight go out on my folks, after friying it trying to extend the fcc cable while the monitor was turned on (not too smart) I picked up another broken one off of ebay for $50 (not the best deal).
The lcd has a pretty crappy response time and contrast ratio, my parents got it before I came to college (3 years ago) for only 150 bucks a frys, a killer deal back then.
I'm projecting on a textured wall with crappy paint that is splotchy, the image is about 125" with the right side of the LCD cut off. The pictures were taken with my 4+ year old 1 mega pixel olympus at 1 'oclock in the afternoon with all blinds drawn and shutters closed.
Anyways, the results for now, I'll post more when I start to build the box with new reflector/condensor and fesnels.
My lcd pannel I originally got for free, it's a crappy kogi (gVision) 15" that had the backlight go out on my folks, after friying it trying to extend the fcc cable while the monitor was turned on (not too smart) I picked up another broken one off of ebay for $50 (not the best deal).
The lcd has a pretty crappy response time and contrast ratio, my parents got it before I came to college (3 years ago) for only 150 bucks a frys, a killer deal back then.
I'm projecting on a textured wall with crappy paint that is splotchy, the image is about 125" with the right side of the LCD cut off. The pictures were taken with my 4+ year old 1 mega pixel olympus at 1 'oclock in the afternoon with all blinds drawn and shutters closed.
Anyways, the results for now, I'll post more when I start to build the box with new reflector/condensor and fesnels.
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Hi Eric,
Great start! Is that using the MH bulb rigged inside the OHP? I'm amazed if that is just the old OHP yielding such good results 😱
Great start! Is that using the MH bulb rigged inside the OHP? I'm amazed if that is just the old OHP yielding such good results 😱
It comes stock in that OHP, the dukane 670, 677, 680, elmo A305 SD, and 3m 9850 all use 575w MH bulbs, but the 3m uses a single ended one.
Projector UPDATE
Well, I bought 5 14" touchsreen lcds off of ebay for a grand total of 70 dollars after shipping. Two of them had cracked screens, One of 3 of them worked great for projectors but I ruined on of the little cables that connects directly to the LCD matrix so I have a row of about 7 pixels that are out going horizontally across the screen.
I split the fresnels on my overhead and placed the LCD between them, they are a little out of place so the corners are slightly dark and you can see slight rings on the screen. I crushed some of the fresnel rings while splitting them and I cracked my upper fresnel, some new ones would look alot nicer.
I got my X2VGA adapter for my xbox, I'll post some of the updated pix with the new LCD (now the whole screen is shown) and split fresnels.
I'm still taking pictures with a horrible 1.3 megapixel camera
still projecting on a horribly painted textured wall, the paint has a differnet sheen to it in places.
screen size is just over 140" diagonal, 110" x 84" blackout cloth is on the way.
pix will be up in a bit, I'm going to host them on my school server
Well, I bought 5 14" touchsreen lcds off of ebay for a grand total of 70 dollars after shipping. Two of them had cracked screens, One of 3 of them worked great for projectors but I ruined on of the little cables that connects directly to the LCD matrix so I have a row of about 7 pixels that are out going horizontally across the screen.
I split the fresnels on my overhead and placed the LCD between them, they are a little out of place so the corners are slightly dark and you can see slight rings on the screen. I crushed some of the fresnel rings while splitting them and I cracked my upper fresnel, some new ones would look alot nicer.
I got my X2VGA adapter for my xbox, I'll post some of the updated pix with the new LCD (now the whole screen is shown) and split fresnels.
I'm still taking pictures with a horrible 1.3 megapixel camera
still projecting on a horribly painted textured wall, the paint has a differnet sheen to it in places.
screen size is just over 140" diagonal, 110" x 84" blackout cloth is on the way.
pix will be up in a bit, I'm going to host them on my school server
The colors look kinda washed out much more in the pictures then it is in real life
they grey you see in the corners is supposed to be there, but not quite that defined
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An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
they grey you see in the corners is supposed to be there, but not quite that defined
Yea, I think its a great start! How does it feel to play games on such a giant screen?
Cheers,
Alex
Cheers,
Alex
well racing games are a bunch of fun, but single player halo I need to sit as far from the screen as possible. Somtimes I don't see movement in my periphrial vision, 4 player on a 140" screen rocks.
some people wanted to see what the setup looked like so I took some pictures. I was able to get rid of the bluryness in the corners by making a bracket and mounting the varifocal lense a little higher then it was intended.
you can see the bracket and my ghetto setup in the these pics.
you can see the bracket and my ghetto setup in the these pics.
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I don't see the lcd in the picture. Did you take it out or something for the picture? Btw that's a great idea making a kinda 'cone' with the cardboard, I think I'll do that with my projector (1st one, parts are on their way to me 🙂 ) Altho I'm already planning on building a wood box for mine a la www.inventgeek.com, plus some added features I thought up 😎sbisdabomb said:
the lcd is "inside" the projector, sandwiched between the fresnels, so what you see is the front fresnel, the LCD is underneeth that.
Wow! How do you do that without overheating the LCD?? Sorry about being so inquisitive, I'm a newb at this stuff...sbisdabomb said:
yes, you can't tell from the picture I have of it but there is a 12v 80mm computer case fan that I have wired into the same 12v powersupply running the lcd control logic. The lower fresnel and lcd make a channel for the air to travel through and keeps the lcd nice and cool (when i remove the fan i start to get a brown spot on my screeen though).
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