Author Topic: Modified LED Safety glasses for IR Headtracking  (Read 19781 times)

Offline jmWii

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on: June 06, 2008, 03:32:21 PM
I took Johnny's idea of using LED safety glasses and swap with IR LEDs for head tracking. The LED glasses from Granger had two 3V batteries per LED for a total of 6V. I removed one cell (now 3V with neg side up) and soldered on a 15 ohm resistor for the 1.6V max IR LED from radio shack (nominal 1.2V) on negative lead. (See completed assembly on the lower right of the picture.) It works great with a "sporty" form factor :-)

Jeff

« Last Edit: June 08, 2008, 11:37:04 PM by jmWii »



Offline Narkaleptic

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Reply #1 on: June 11, 2008, 10:30:14 AM
I had some 1.5V batteries lying around that were about the same size.  I discovered, however, that the LED was too weak to move beyond 18 inches from the wiimote.  Instead, I just directly rigged up one of the original batteries and it seems to be working great.

Is that going to significantly damage my LEDs with being fed 3V?  Use small words, I don't know the difference between amps and volts.

I used AO Safety LED Light Vision V2 Safety Glasses #974900 and High-Output Infrared LED.  If you buy those glasses together with a wiimote, you save $2!



Offline jok3r128

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Reply #2 on: October 21, 2008, 01:41:28 PM
if it was going to damage the LED's ten it would show very quickly by shorting and getting very hot



Offline Marco

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Reply #3 on: December 16, 2008, 04:28:03 AM
I just replaced normal LEDs in a pair of safety goggles with IR LEDs (20mA, 1.2-1.5V) so they're burning at 6V (2x 3V CR2032 batteries). No problems. The LEDs apparently take it. I figured if they put 6V on standard near to free LEDs (the goggles only cost me 5 euros), the IR standard LEDs should handle it too. And they do.

The power of the LEDs however is too low to have any real range on the Wiimote. About 3-4m is maximum and the signal is intermittant.
I've tried, not yet tinkered with it, a wireless sensor bar (way do they call these "sensor" bars? when it's not) and that works superbly. Easily 7m range (haven't tested it further) and a large view angle. The wireless bar is really good (this one is from Speedlink and costs 16 euros).

Marco



Offline cheap Vista user

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Reply #4 on: December 18, 2008, 11:01:01 AM
I also bought the glasses at http://www.amazon.com/gp/product/B000S97ZW4

I bought my IR LEDs from Amazon as well, getting some cheap ones.

I bought:
6 of: IR 5mm LED Sold by: Parts Express   $0.35

4 of: 9V Battery Clip Sold by: Parts Express $0.30

I figured two would be put inside the safety glasses, and the other four I'd hook to 9V batteries for something.

Anyway, I can't see them light up.  In the YouTube video, after he changes his lights, you can see them light up.

So, these aren't strong enough?  Do I need to get the more expensive ones?



Offline Advice Pro

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Reply #5 on: February 02, 2009, 03:22:17 PM
Can you name for me the tools needed to make infrared sensor glasses?this