Instructables

85 Inch Rear Projection Wiimote IWB (Interactive White Board)

Picture of 85 Inch Rear Projection Wiimote IWB (Interactive White Board)
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This Instructable show how to set up a Wiimote Interactive Whiteboard using Johnny Lee's technique. There are other Instructables dedicated to setting up and utilizing the Wiimoteboard, so I am not going to cover the basic set up steps.

I originally set up a front projection system in my classroom with only one Wiimote and I found I had major tracking issues and it was difficult for my students to understand they couldn't block the camera in the wiimote. So I decided that I wanted to make a large rear-projection screen set up in my class.

At first I had trouble finding information about this set up. It is more time consuming to make so I assumed that is why it not commonly used. Originally I tried what some others had done, trying to use frosted glass or plexiglass but I got really poor diffusion. I also tried the Frosted shower curtain approach which also gave poor results (hot spotting).

I finally decided to spend the $37 dollars on actual rear projection material. And the results blew my mind. I then built a frame and support legs with wheels for my screen, all in all it cost me about $75 - $100 including the screen material. This is by far the easiest to use and explain wiimote set up and my students love it.
 
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Salvarath1 year ago
Hi, would it be possible to reduce the throw distance with mirrors or something, or maybe a short throw lens accompanied by a lens that takes the small image (the image is small because of the distance it hasn't traveled) and spreads the image to cover the canvas? Is anything like that possible so that the projector, Wii mote, and supplies can be hard mounted as a part of the display?
Awesome board. I am going to make something similar this weekend. I had a question about the width you purchased for the screen material. Was it the 55 inch? I'm sure it was based on the price but I want to make sure before I order it. How is the board holding up? Any changes you would make in retrospect? Thanks for the inspiration and motivation to take on this task.
I heard some good stuff about weaving together wax paper as a backdrop. Where do you place the wii in the set up from behind, cause you must get very clear light blobs...
tombarb (author)  matt ledding5 years ago
the wiimote is behind the screen sitting on top of the projector. This way it is impossible for my body to get in the way of the infrared light. It passes through the screen material with no problem.
Tom, you have very much inspired me to start playing with retro projection, although as we have less class space in Spain, a mirror or two might be in order... if the wii is on top, everything should get passed through the mirror, I suppose.
tombarb (author)  matt ledding5 years ago
I am actually working on the same idea, I just bought my mirrors a few weeks ago, but with school starting up I have not had the time to complete the project. If you have any success please let me know. and I will do the same. From what I understand about light and mirrors the concept should work fine.
jammin0 tombarb3 years ago
Did you ever follow through on adding a mirror to shorten the throw distance? I really want to do this but with a piece of acrylic on the front so I can use a pressure sensitive pen. Acrylic kind of blows my budget and it seems like it would have to be really thick in order to be sturdy at such a big size screen. Check out this instruct able I just threw together for how to make a pressure pen. http://www.instructables.com/id/Pressure-Sensitive-Tip-IR-Pen/
 I keep getting ghosting (glass) or crap reflection (plastic ikea mirror)  any luck on your side?

By the way, what are you using for software on the board? It looks great?
tombarb (author)  matt ledding5 years ago
Im running on my mac. and the programs i use are Safari for internet (obviously), Sketchbookpro for the whiteboard like handwriting, and google earth for the maps.
sgorman13 years ago
This is incredible! Great job and awesome instructable! I need to look at Johnny Lee's wiimote instructable for sure. Thanks for putting this together!
ulfilas3 years ago
what distance is the wii from the screen? I'm trying to work out maximum screen size/distance... Front projection will work from a much further distance of course - but like you I'd rather use rear projection!
ajrisi4 years ago
 While I hate to nit-pick such a wonderful article, it should be noted that what you type as "whole(s)" should be "hole(s)". A "whole" refers to a single entity including all subcomponents without exception, while a "hole" is an opening into or through something.

Otherwise, very nice!
zyzar4 years ago
Hi,

i'm curious that can I use projection screen material in different brand? and can wii remote capture IR source through the projection screen material?
tombarb (author)  zyzar4 years ago
 I have never tried any other brands, but im  sure there must be others out there. I would recommend doing a darker color this helps with hot-spotting issues. The IR capture as worked great for me, this is because it is meant to have light shine through it (rear-projection)
thegallery4 years ago
Are most projectors capable of projecting from the front and the rear, or do you have to get one that is specifically a rear projector? 
Great usage of the technique, really well done. I had considered Johnny's idea as a nice novelty, but didn't really have a use for it, now I could really see this for doing graphic work and presentations. Thanks for another reason to avoid doing actual work for awhile lol
theRIAA5 years ago
you should add a link in the beginning because I was a little confused there for a second.

Just select "Johnny Lee's technique" in your intro, click "link" and paste "http://www.instructables.com/id/In-depth-Wiimote-Whiteboard-How-to/" as the address

really cool though, it's like the internet hands-on, great build.
tombarb (author)  theRIAA5 years ago
Thanks for the advice, I definitely will add the link.