Wiimote Project

Wiimote Projects => Wiimote Finger Tracking => Topic started by: netsultan on January 15, 2008, 03:54:26 PM

Title: Grid of the Wiimote
Post by: netsultan on January 15, 2008, 03:54:26 PM
Heya, i saw your video, but i have a question: what is the grid with a hole that you put just in front of Wiimote? where can i find that? I'm spanish i dont understand such that part of the video :S

btw, i have to congratulate you, Johnny, you're a genius!
Title: Re: Grid of the Wiimote
Post by: atomriot on January 15, 2008, 04:02:02 PM
it is an array of IR (infrared) LED's he made it to help reflect light back to the wiimote.
Title: Re: Grid of the Wiimote
Post by: netsultan on January 15, 2008, 05:13:22 PM
but it's not connected to the Wiimote, isn't it? i dont understand clearly how the grid helps the capture of IR :/
Title: Re: Grid of the Wiimote
Post by: atomriot on January 15, 2008, 05:20:50 PM
the grid requires some power source. it is used because he puts reflective tape on his fingers and that grid of IR LED's reflects back a signal to the wiimote.

The other applications uses a home made light pen that has an infrared LED and that is what the wiimote sees. this app uses your fingers so you need to put something to reflect light but you still need a light source. the grid was made to be your light source. you have to have some infrared source for the wiimote's infrared camera to detect.
Title: Re: Grid of the Wiimote
Post by: netsultan on January 15, 2008, 05:24:53 PM
mmm, i see, and how can i do that grid with unique power source to all the LED's?
Title: Re: Grid of the Wiimote
Post by: jjcomet on January 15, 2008, 05:31:52 PM
Hi, i'm new to the forum (but not new to wiimote hacking), and i'm currently in the process of building an infrared LED panel, like the one in the finger-tracking video. Although i have no electronics expertise, i've bought the following items:
ten infrared LEDs (100mA)
ceramic punched-hole panel
various resistors
5v battery

and I'm researching/experimenting with the various resistors; i tried it with a 3k ohm resistor, but the leds weren't very bright; i tried it without a resistor and blew the leds! Anyhoo, i'll post more when i've had success..........
Title: Re: Grid of the Wiimote
Post by: atomriot on January 15, 2008, 05:32:28 PM
http://led.linear1.org/led.wiz

that should help you. you need LED's a board to hold them, a power source and resistors.
a soldering iron would probably help and then you can get as fancy as you would like
Title: Re: Grid of the Wiimote
Post by: netsultan on January 15, 2008, 05:39:12 PM
looks like a truly hacker task, but i don't have any knowledge about electronics or such thing, maybe the components are in a hardware store, right?
Title: Re: Grid of the Wiimote
Post by: netsultan on January 15, 2008, 05:58:46 PM
yeah, the LED panel can be bought in a hardware store, only i have to know how to plug the power source the panel and i guess it's ok. So, the Wiimote it's not conected to the LED panel, right?
Title: Re: Grid of the Wiimote
Post by: netsultan on January 15, 2008, 06:03:27 PM
btw, what it's the material that Johnny put on his fingers to reflect the IR?
Title: Re: Grid of the Wiimote
Post by: troy59 on January 16, 2008, 01:49:46 PM
the material he used was a reflective sheet that you can find at a hardware store or, as he found his, ebay. But what you want to do is get some IR leds, they shouldn't be emmiting any light as our human eyes can't see that, what is the forward voltage on you leds? you can go to this site too test out what what kinda of resitors you need
http://ledcalc.com/

typer in how many volts your using, then you forward voltage, then how many ma you can use. I hope this helps
Title: Re: Grid of the Wiimote
Post by: jjcomet on January 17, 2008, 07:07:59 AM
Hi guys
does ambient light affect the IR sensitivity range of the wiimote? I built myself an IR array (with 12 100mA leds), and the range is pretty poor; less than 0.75m; btw, not testing it with reflective tape yet; using a CD or aluminium tape on fingers

wiimote IR -> glovepie -> msp

cheers
JJ
Title: Re: Grid of the Wiimote
Post by: troy59 on January 17, 2008, 09:37:52 AM
get anything you can find that is very reflective, if you could, try to get pieces of mirror to put on your fingres, i'm not saying go take some off your mirror in your bathroom, just try to find the most reflective thing you can find see if that makes it better, if not, add more led's to your array.
Title: Re: Grid of the Wiimote
Post by: netsultan on January 17, 2008, 10:11:45 AM
I guess the best chance to get a reflective image is envolving your fingers with some kitchen silver paper. I repeat "I guess", I don't have yet the Wiimote, but soon, soon :P
Title: Re: Grid of the Wiimote
Post by: troy59 on January 17, 2008, 11:25:42 AM
ya
Title: Re: Grid of the Wiimote
Post by: netsultan on January 22, 2008, 11:20:17 AM
yay! At last! i have my Wiimote on my hands! Now i have a new problem :(

I tried to connect via BlueSoleil the Wiimote, and it doesn't detect my BT device. I read that there weren't problems with the built-in device at a HP laptop. Btw, the windows BT manager detects it, but it claims for a PIN to synchronize the devices, how can i avoid it?
Title: Re: Grid of the Wiimote
Post by: troy59 on January 23, 2008, 10:56:56 AM
instead of using bloeseil, use your computer built in device.

Go too start>control panel> blutetooth settings and there you go. Just connect how it says and your ready
Title: Re: Grid of the Wiimote
Post by: ur2much1908 on January 29, 2008, 12:31:51 PM
Hey guys....just some suggestions. I'm a bit electronically challenged..lol..but I found these items assisted in the creation of the project:

IR LED kits...which can be bought from ebay..It's setup so that it is very simple to put together. or check out dalewheat.com and scroll all the way down when you get to the page..you'll see something that says IR spotlight...it's perfect!

As for reflective material...go to a bike shop and buy reflective tape there. It's much more readily available...don't break your mirror..that's 7 years!!
Title: Re: Grid of the Wiimote
Post by: troy59 on January 29, 2008, 01:56:36 PM
cool, thank you very much.
Title: Re: Grid of the Wiimote
Post by: Harani on August 05, 2008, 11:03:10 AM
To all those trying to utilise foil, mirrors, CDís etc I donít think you will have much luck. The problem is not that they are not reflective. Itís that they are too reflective in one direction only.

If you take a CD and shine a flashlight at it, the result will probably be a fairly tightly focused spot of light on the ceiling or wall somewhere. Now imagine that flashlight is your IR array and your wiimote is right beside it. It suddenly becomes quite obvious that all your IR is being bounced away rather than reflected back. Your CD/piece of foil/mirror is going to have to be at a very specific angle to reflect that light directly back to the Wiimote. Something thatís not going to happen if youíve got little bits of it on your fingertips and they are moving all over the place.

The material that Johnny uses, And the  material that the previous poster suggested getting from a bike shop (Aaso the reflective saftety tape you can buy to stick onto kids clothing )all do the same thing. Their surface is multifaceted so that whatever direction you shine a light onto it from, it will be reflected back to that light source.

I agree with Karma, buy some tape and ditch the mirrors