Do you have a large projector, but no where to place it to project it onto the wall. You just keep it in storage, then when you have a group of friends over, you have to readjust it on the table to center it on the wall/screen. You won't have to do this anymore...
Here's my solution to the problem I had. My room is small (and finally finished, now to move everything back in) and not alot of room for everything I have, so I improvise to make everything "fit". I didn't use my projector a whole lot (usually on a screen I put up outside for our firepit gatherings. It's a 8'x12' :) ), but when I did, it was a pain to setup. I also wanted an area to practice with my plastic bb pistol, so I solved my problems with this idea.
I had already made this shelf, so I made up some plans in paint so you can follow the basic steps on how to make one of your own ;)
There's a short and long version of video below. The long version may take a while though...
Step 1: Materials and the basics...
Materials you'll need (you can also improvise, as I did):
1. Wood boards (amount depending upon the size of your projector)
2. Two hinges
3. Right Angles/brackets
5. Screw driver/hammer
6. Jig saw/hand saw/circular saw (etc.)
7. Tape measurer and pencil
8. Router (optional)
The basic design as depicted below is that the shelf would fold down to allow you to place the projector on the top while the other shelf supports it. It would fold back up to take up less space after you were finished using the projector.