DIY Video Projector Part II

[icculus]

just stumbled on this site. this company sells a variet of boards with lcd controllers. haven't weeded through all of it yet, but there could be something good here.advantech

[AshanCN]

Has anyone tried using the new super bright LED for a light source ... ( I know it was ruled out earlier because of the cost )

I did a web search on LED + LUMENS on google and came up with a LED that is supposed to emit 125 lumens.... could this be real? Couldn't find a price though.....

[Timtimes]

It was in the first thread. Cost was an issue for sure (how much would you spend if each LED cost $2(for example) and only put out 125 lumen? Don't forget the loss associated with going through the LCD panel (>75% and some say 90%). You're talking big bucks there alone. Factor in the difficulty with focusing all those LED's? Fuggetaboutit.

Enjoy.

[snoogans]

i don't know if this is the right thread for this, but here goes, i'm selling a sharp qa-1200, its for sale on ebay right now if anyone wants it... http://cgi.ebay.com/ws/eBayISAPI.dll...tem=1773843083

[sai]

anyone know of any local U.S. stores that sell 3x or 6x fresnels?

[DPW666]

I don't know if it has already been posted but I found cheap MH complete sets with reflector http://www.meci.com/default.asp?feat...54&mode=Search

[Bitch]

I once participated for this forum actively but it stopped when I had to reinstall Windows and this site woulnd't recognize me anymore. I couldn't remember the pwd and my email wasn't working anymore so I couldn't receive the pwd.
So anyway I stumbled to this site few days ago and tried all the possible passwords I've ever used and got lucky.

Anyway I have ohp+proxima ovation 810 setup but never use it really. The reason is simple: Big screen with shitty picture isn't just very enjoyable to watch. In my setup the problems are:
- Panel is so old so it has faded from various places
- It "lags" so in really fast motion scenes you can see it drawing it
- You can see the pixels
- Colors look very toy
- Ohp leaks light quite a lot
- It's noisy as anything

You can ofcourse ignore these and try to enjoy the movie itself but after watching 10 or 15 movies with it (atleast in my case) you just really want to watch them from the good old tv.

So I'm just intrested has anyone here achieved something that after watching 15 movies you still can honestly say that you find it more enjoyable to watch from your screen than tv?

Also has anyone had any luck using TFT-monitor as panel without breaking it? And if so, how good are the results compared to normal projection panels? And compared to tv?-)

Anyway, keep up the good work. It's fun even if it doesn't replace tv.

[Axeman]

Hello again Bitch,

I for one can definitely say that I enjoy my projector far more than my TV, for hours of viewing. My OHP is only 3000 lumens! But of course my panel has a good response time and pretty good color. The only reason I still watch video on my TV(well, my HTPC's 19" monitor) is for convenience. I still need an easy way to switch to the projector, and a good place to mount it permantly, other than the middle of the room.

I do not think it's time to give on this project. I am trying to get a metal halide system locally. and jam it in my OHP. The optics work the way they are, and I'm OK with the size. I just need a brighter light source, and to figure out the best way to mount it.

[Mystircal333]

You're being warn Axeman, "jam it in my OHP" is an understatement, unless you know what you are heading too. I hope you are not at foolish as I was to think that by placing any bulb in your OHP will make the OHP magically work. Have you check around the post for a MIH setup up yet. It really helpful.

[Rolm]

http://www.bulbs.com/products/produc...inventory=9722
(better price here http://www.atlantalightbulbs.com/eca...pages/1383.htm)

This is about the most reasonable balance of MH, reflector, and cost I've seen. It's a PAR38 narrow spot (16deg) that's 4-3/4" diameter, and it takes a cheap M57 ballast. Get a medium socket (~5$), make a metal can, open up the back of your OHM and try to mount it.

bulb - $90
ballast - $50
socket - $ 5

It _says_ 60,000 lumens, but I doubt it. And it doesn't have the greatest life, but 7500 hours @ $90 = $0.012/hour.

I was toying around with trying to make a reflector so I could use a regular mogul bulb, but this seems much, much easier. If the light output is anywhere near accurate, I might be in business.

I will be trying this setup in a cheapo 3M projector I got for the goose-egg in the next month or so. I'll tell you how it works out. And if it doesn't, I'll have a great way to **** off my neighbors. Midnight sun in the backyard!