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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > IR led help

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TexasJr #1 06/06/2009 - 06h33

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Would this work?
http://www.radioshack.com/product/index.jsp?productId=2062565
babasior #2 06/06/2009 - 09h54

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Half View Angle (Degrees): 6.36

The most important is view Angle - Best View Angle must be more than 65° - 80° is perfect !

So ask more information about view angle ...
Babasior.
FreeTrack Online / www.Free-Track.net
TexasJr #3 06/06/2009 - 17h08

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Do you know some retail store where I can find an infrared one?
Im planning on using my wiimote and I found a 60 degree one but its not infrared
TexasJr #4 06/06/2009 - 17h22

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Just use standard, widely available infrared LEDs, their viewing angle is too narrow for head tracking but this is easily fixed by filing the lens tips down flat. This reduces their brightness due to a wider emission angle but they're still no less bright than commercially bought wide angle LEDs like SFH485P.


I just read that, so I was thinking about still buying that ir led that I had on the link but the problem is, I am an electronics n00b and I don't know how to do this:
fixed by filing the lens tips down flat.
r0tty #5 07/06/2009 - 13h31

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I think it is meant to create a flat surface LED out of a round one. According to this picture:

Posted Image
http://en.wikipedia.org/wiki/File:LED_Labelled.svg

it would mean to use a file to remove some of the epoxy lens case (for example to the line that is drawn in this picture) without opening the case and the semiconductor die to the free air.

The SFH485P has a flat LED surface out of factory.
Edited by r0tty on 07/06/2009 at 13h32.
TexasJr #6 07/06/2009 - 16h46

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Sounds good. thanks babasior and rotty
jerryb #7 17/09/2009 - 12h10

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Hi, new to this forum, built the hat using the ir's recommended, sorted the camera ( logitech quickcam messenger), can see red blobs on the screen but no matter how many sliders I fiddle with I cannot get the blobs small enough to only get three points on the screen.  Obviously I'm getting something wrong but I can't figure out what.  Help!!!!
CadillacShane #8 18/09/2009 - 18h14

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Hi, new to this forum, built the hat using the ir's recommended, sorted the camera ( logitech quickcam messenger), can see red blobs on the screen but no matter how many sliders I fiddle with I cannot get the blobs small enough to only get three points on the screen.  Obviously I'm getting something wrong but I can't figure out what.  Help!!!!



Just want to make sure that when you click on "camera" in the free track interface, and click "video format" that you have turned all of the sliders down to 1 or 0 and unchecked the "auto exposure" box.

Let me know, and we can move on from there.
jerryb #9 19/09/2009 - 13h55

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Hi, haven't got auto exposure but auto gain with a exposure slider under that so I've unchecked it and moved all sliders to the left, gamma still reading 1000, nothing at all showing on the screen, no blobs of any size!!!
CadillacShane #10 01/10/2009 - 20h18

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Hi, haven't got auto exposure but auto gain with a exposure slider under that so I've unchecked it and moved all sliders to the left, gamma still reading 1000, nothing at all showing on the screen, no blobs of any size!!!




I would try and move the exposure slider up to maybe 5.  Then manipulate the threshold slider and see if that helps.

Another idea, is to click the camera again, but instead of settings, click format, and change it from RGB to 1420 and the red blobs should show up a little better, because they will show as white.

Hopefully that helps.

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