I am interested to know if anyone has modified this projector setup to be a ceiling mount projector. I currently use an OHP, but I want to build a ceiling mount projector. I just do not know what is involved in changing the one on this site? Does anyone know what I will have to change to make Brainchilds projector work as a ceiling mount?

Also, any news on when the 7 inch plans will be out? Maybe this projector would be better for a ceiling mount?

I want to make sure that this is something that I can easily do with his plans before I purchase them.

Thanks,
CMessa

Cmessa, The 7" projector project is delayed because my 7" panel was stolen during shipping by UPS. I'm expecting to have this project done in about 2 months time.

For ceiling mounting the 15" projector. there's no reason you can't do this. You'll have to use a fresnel field lens in front of your panel for keystone correction. You'll also want to make sure you have the headroom on your ceiling.

That is to bad about your 7 inch LCD. Not good when the shipping company gets your stuff.

Anyway, how much more compact do you think that your 7 inch will be? I have not purchased your plans yet, so I do not know if I have the headroom for the 15 inch or not. It will be located in the basement that I am finishing now, so headroom is not as critical as in a normal living room. Although if the box is huge, then it will not work.

I have looked at other sites and seen other people projectors and some of them are way to big. DIYlabs has a nice one that is not to big. Trev on the DIYAudio site seems to have a very nice small unit. Although his unit looks to be a lot of work.

What is keystone correction?

Thanks for the info.
CMessa

The dimensions on the 15" projector are:

H: 11.75"
L: 27.5"
W: 15.125"

Keystoning is caused by the projector projecting at an angle to the screen. On a ceiling mount the projected image will be smaller at the top than at the bottom. This needs to be corrrected with a movable optic in front of the LCD panel.

Does the fresnel in front of the panel need to tilt on its central axis or on the top or bottom sides as in the sample image below or can tilt on bottom/top axis?

Center axis...nice diagram!

Wow! That is a nice diagram.. I wish I had artistic flair like that

BRAINCHILD HOW MUCH CONTRAST RATIO YOUR 7 INCHES LCD WILL BE .......ALSO I HAVE IDEA IN MY MY WHY WE CANNOT USE SUPER SMALL lcd'S AND OPTICS LENS SYSTEM AS A SPARE PARTS TO MAKE OUR PROJECTOR AS THEY CAN PROVIDE US THE CONTRAST RATIO UPTO 2000:1 FOR VERY CHEAP I THINK SO ........ GIVE A LOOK TO............. INFOCUS x1 COSTS 1000usd I THINK ITS VERY CHEAP FOR 2000:1 PROJECTOR ALSO ACCORDING TO PRICE OF THE PROJECTOR MAY ITS SPARE PARTS WILL ALSO ...,,!!!OR MAY CAN BE CHEAPER TOOOOOOO...........WITH THIS TYPE OF SMALL LCD AND LENS WE CAN MAKE A SUPER SMALLL PROJECTOR IF WE ARE READY TO INVEST 20% MORE ON OUUR PROJECT ALSO WITH THIS TYPE OF CONTRAST RATIO IT WILL BE POSSIBLE TO VIEW OUR PROJECTION IN DAYLIGHT

http://www.projectorpeople.com/projectors/...name=InFocus+X1


LINK TO INFOCUS xi

Nice but, did you check out the price to replace the lamp in 2000 hrs or so?

I think the X1 is crap. Also those contrast ratios are padded, they use a 'full on full off' testing method.

The other thing to keep in mind would be that it will significantly increase the difficulty (and cost) to be able to control those 'super small lcds'