Author Topic: A FIX FOR NARROW ANGLE IR LEDS!  (Read 6920 times)

Offline ppcp

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on: May 17, 2008, 08:29:22 AM
Well, i hope it's a fix... All those of you who have problems with narrow angle/low power/no reflection, etc. could try something like this:

On the left is a pic of a regular IR pen. On the right is a pic of the same pen but with IR LED turned in the direction of Wii. After that you can still fine-tune the tip, etc. You could even bend the legs on the LED, so the LED is still at the same position as on left pic, just pointed in different position. Also, this way there is no more loss of sensitivity because of the distance in back fit pens.

The only thing to remember is to hold the pen in the same position, so that LED is always pointint in the direction of Wii. Right?

I tried to make some quick-tape-battery-led monsters and the above theory works just fine. Just need someone with skills and tools to make me a proper pen now.

yo!



Offline brentrs

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Reply #1 on: May 17, 2008, 09:14:36 AM
That is exactly what I had to do to test out my quick/cheap pen using a bad radioshack led.  Worked pretty well actually, once I got used to not tilting or twisting my wrists while using the ir pen.  Bending the led leads was the key, but it actually took me a while before that "Eureka!" moment came!

brent stevens
www.thewiimp.com



Offline ppcp

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Reply #2 on: May 18, 2008, 08:18:42 AM
Ok, after making a pen out of nothing:
-reset switch from old 486 PC
-AAA battery
-an 17 degrees IR LED !!!

Some useful info:
-the LED is bended in a direction of Wii
-distance is 77cm from wii to center of monitor (see pic)
-whiteboard software utilization is 13%

This is how it looks and the video shows the results from the FIRST USE!! NOT BAD AT ALL!!!

http://www.youtube.com/watch?v=mePmFROV7cs
« Last Edit: May 18, 2008, 08:26:58 AM by ppcp »



Offline thex

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Reply #3 on: May 26, 2008, 05:28:38 AM
wouldn't it be possible to put some kind of diffusor in front of the led? something like sanded plexiglass?

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Offline apdewith

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Reply #4 on: May 30, 2008, 02:49:47 AM
I am a little confused here. Some posts mention using a lens and/or reflector and here I read about fixing narrow angles.
Am I correct that pointing the IR LED to the WiiMote requires wide angle while pointing to the screen requires a clear strong IR circle to be detected by the WiiMote?



Offline thex

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Reply #5 on: June 05, 2008, 04:16:56 PM
you are right i think

if the for example ir pen has the led on its tip then it should be narrow angled otherwise the reflection would be big an inaccurate...
but if the led is pointet twoards the wiimote the angle should be as wide as possible so it can be detected from many angles...

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