Author Topic: Whiteboard working perfectly with laser  (Read 15609 times)

Offline Tysss

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on: October 29, 2008, 02:19:28 PM
First of all, I'd like to say hi to every one.
I'm from Finland, and I'm 15 years old. I've been reading this forum since last march, but this is my first post =)

So, I've seen lots of ideas of using a laser instead of a ir pen. Well, in fact, I made it about four months ago. And it works perfectly!

I've been using Johnny's Whiteboard application, a video projector and a standard laser, bought from local store, it cost about 4.

I removed the ir filter from wiimote, and put it laying on the top of the projector. Then I tried to calibrated it. It was way too hard to do with laser, so I used my ir pen. It worked!

After that I've solved lots of problems. I noticed that different projectors emit lights differently. With some projectors calibration is easier when there's a (not sure what it is in English ;) )
thin red or green film (cost 40snt in local store) in front of wiimote. After calibration I took it away.

Also direct sunlight was bad, but the room had always normal lights on when I used it.

And to see where you are pointing the laser, I used three 1,5 V batteries, wired so, that laser gets always 1,5 volts (wiimote doesn't see beam so weak, but you do) and when i press the button, it gives 4,5 volts (wiimote sees it).

I have much more ideas, solved problems etc., but now i go to sleep.
I can give you link to great internet store, where you can buy everything
you need with just few dollars.

I hope that this post helps someone, or makes you create even better ideas =)



Offline dice

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Reply #1 on: October 29, 2008, 04:42:00 PM
Sounds like you have put allot of work and thought into this, please keep us posted on what your plans are for the future.

Dice :)



Offline UndCon

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Reply #2 on: October 29, 2008, 06:21:22 PM
Hi Tysss!

Sounds like you have something to share with us all :)

Please post some pictures when you are done sleeping (Finland is 1 hour ahead of me so I know its late)



Offline benpaddlejones

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Reply #3 on: October 29, 2008, 09:06:07 PM
Tysss
Does by putting the green/red filter infront of wiimote to make calibration better does that mean general mouse tracking is better too?

Some pictures of the film you are using would be good, I assuem just a filter (like they use infront of Theatre lighting to make various colours, just maybe a bit thinner).

Some really cool ideas and teasting here!

Benpaddlejones :-)


See my full profile and links on my Google Profile: http://www.google.com/profiles/benpaddlejones


Offline Tysss

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Reply #4 on: October 30, 2008, 11:40:47 AM
Does by putting the green/red filter infront of wiimote to make calibration better does that mean general mouse tracking is better too?

Some pictures of the film you are using would be good, I assuem just a filter (like they use infront of Theatre lighting to make various colours, just maybe a bit thinner).

Yes, you're right, I used it as a filter, that makes laser HARDER to see by the wiimote (with ir pen it is useless). But it isn't necessary.
With it in front of wiimote, it takes for a while to wiimote to see the dot, so it won't take two calibration dots (sry my bad english)
when you point in one corner. If you use ir pen to calibrate, it is easier if you use ir filter (unless you lose it ;) ).

I used this idea in one party.. Perhaps you are interested in it too.
I have few airsoft guns, and I've always loved those arcade games where you shoot with a plastic weapon, so I made my own version of it.
I attached the laser to one of my pistols, so when I "shoot", the laser flashes. The hardest part is to make the laser point exactly
there, where you are aiming. Of course the laser doesn't need to be perfect, because you aim with sight of the weapon, not with the laser.
You just can't use ir pen to calibrate if the laser isn't aiming in correct direction.

Well, now I have wireless pistol-mouse. What am I going to do with it?
There are some arcade games that work under windows. Like virtua cop 2. Very good game btw ;). Unfortunately wiimote whiteboard just isn't
compatible with those games. Maybe there is some variation of whiteboard application that works, all I know that Johnny's program doesn't.
The problem is resolution. If the resolution changes (like in virtua cop 2), calibration won't work anymore. I found some fps games on internet,
that you need only mouse. They work well.

btw., can I put direct link to internet store? There are so cheap and so useful things, like tripod for wiimote, triagram screwdriver,
WU brand wiimote etc.?

Now I'm going to take some pictures, I'll put them in next post.
« Last Edit: October 30, 2008, 12:02:30 PM by Tysss »



Offline Tysss

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Reply #5 on: October 30, 2008, 11:58:17 AM
I hope these photos aren't too large.


green filter to ease the calibration when calibrating with laser instead of ir pen


same green filter and original ir filter, ir filter eases the calibration with ir pen


My airsoft glock 17 with laser, works as a mouse.




Offline eyucel

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Reply #6 on: December 17, 2008, 02:30:36 PM
I tried the laser pen and it worked very smoothly if the wiimote is one meter away from the wall. If further, still I could calibrate, but lines are not very controllable.

Tysss have you had the same problem. Thank you



Offline Tysss

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Reply #7 on: December 31, 2008, 01:58:21 PM
I tried the laser pen and it worked very smoothly if the wiimote is one meter away from the wall. If further, still I could calibrate, but lines are not very controllable.

Well, since I don't speak english as my mother tongue, I'm not sure if I understood your problem right.. but how powerful is your laser? I've used mostly lasers from dealextreme.com, since there's no shipping fees at all. Those lasers are about 3-5 mW, so they're quite powerful. Lasers meant for powerpoint presentations etc. have just about 0.5 mW, I had lots of problems with those lasers.

http://www.dealextreme.com/details.dx/sku.9768~r.43226827
good laser pointer

http://www.dealextreme.com/details.dx/sku.13378~r.43226827
better laser, but just module.

dealextreme is very reliable, I've bought very much different things from there, and haven't had any problems at all.

I hope that this somehow answered to your question. =)



Offline eyucel

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Reply #8 on: January 02, 2009, 02:17:29 AM
Tysss
Thanks for the answer. I was very helpful. I have ordered 4-5 different lasers, I will let you know which one works best. Sorry, English is not my mother language either.

I took off the IR filter from the wiimote as you did. And, yes I used a  3-5 mW laser. a 0.5 mW laser did not work.
If the wiimote is one meter away from the projection screen, a 3-5 mW laser works very well. But when I put the wiimote 2 3 meter away from the screen, a 3-5 mW laser did not work perfectly.
I have two questions:
1.Do you think it is a power output problem or an IR laser would be better?
2. what is the longest distance (between the laser dot and the wiimote) you experienced?
I really appreciate you sharing your experience with us. Take care.

  00051  2-in-1 LED + Pointer Flashlight x 1 Pending   $1.80  -
  07544  Green Laser Point Pen 20mW (2xAAA) x 1 Pending   $19.38  -
  09768  Red Laser Keychain (5mW) x 2 Pending   $1.91  -
  12338  2-in-1 Hybrid 5mW Red + 5mW Green Laser (Supports Dual Laser Mode) x 1 Pending   $31.07  -
  16093  100mW 650nm Red Laser Pointer (2*AAA Batteries Included) x 1 Pending   $23.90  -




Offline Tysss

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Reply #9 on: January 04, 2009, 10:26:10 AM
1.Do you think it is a power output problem or an IR laser would be better?
2. what is the longest distance (between the laser dot and the wiimote) you experienced?

1. ir laser would be best, since there wouldn't be any other light than light from laser, but they are too expensive, like 200. But if you can get a filter meant for lasers (for that wavelenght you are using), i suppose that the result would be same (as with ir laser). more powerful laser could also be an answer..

I'm not sure but the problem of yours could also be in your room that you are using. I can't test this now but if I remember well, direct sunlight almost made wiimote temporarily blind.. if your window was open that could be the problem. light from lamps didn't bother.

2. I normally put the wiimote about 3 meters from the screen, without problems. 5 meters is longest i've tried, and it didn't work (well).

useful stuff from dealextreme:

http://www.dealextreme.com/details.dx/sku.1309~r.43226827
http://www.dealextreme.com/details.dx/sku.14150~r.43226827
these two together = wiimote tripod

http://www.dealextreme.com/details.dx/sku.1887~r.43226827
Trigram Screw Driver for opening wiimote, it eases tooking ir filter away.

http://www.dealextreme.com/details.dx/sku.4248~r.43226827
i use these to make those little batterys to stick together

I see you ordered a 100 mw laser? that's VERY dangerous! it could almost burn things! please be careful  ;)
« Last Edit: January 04, 2009, 01:38:39 PM by Tysss »



Offline eyucel

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Reply #10 on: January 05, 2009, 02:13:28 AM
Thank you Tysss,

I will let you know about the results and thanks for the warning (I'll be very careful).



Offline eyucel

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Reply #11 on: January 15, 2009, 01:40:39 AM
Hi Tyssss,

As promised here is the results of the experimentation.

  00051  2-in-1 LED + Pointer Flashlight x 1 Pending   $1.80  - GOOD BUT ON THE VERTICAL EDGES
  07544  Green Laser Point Pen 20mW (2xAAA) x 1 Pending   $19.38  -  NO GOOD
  09768  Red Laser Keychain (5mW) x 2 Pending   $1.91  - GOOD BUT ON THE VERTICAL EDGES
  12338  2-in-1 Hybrid 5mW Red + 5mW Green Laser (Supports Dual Laser Mode) x 1 Pending   $31.07  - RED IS NO GOOD, BUT THE GREEN IS GOOD.
  16093  100mW 650nm Red Laser Pointer (2*AAA Batteries Included) x 1 Pending   $23.90  - VERRRRRY GOOOOD-VERY BIG IR BLOB- DISTACE IS NO MATTER.



Offline Tysss

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Reply #12 on: January 15, 2009, 12:29:09 PM
So you think that the 100mw laser is best one? cool =) when the laser is so powerful, i guess you can put anything in front of wiimote, so you could be sure that there isn't any problems with false detected dots.

btw. I just tried to look at a 650nm red laser trough ir filter, and i saw it! well, i barely could see it but i saw (which means that it isn't good ir filter). It might be so, that with powerful laser enough there isn't need for taking ir filter off! I'd like to know if you could use laser-whiteboard with ir filter on the wiimote with that 100mw laser, could you test it?

thanks already!



Offline eyucel

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Reply #13 on: January 16, 2009, 12:52:21 AM
Tysss,

I've already tested, no chance.