Author Topic: IR Glasses  (Read 9802 times)

Offline Peter

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on: January 21, 2008, 01:26:56 PM
Hi guys,

I really like the projects. I rebuilt the glasses with 2 flash lights attached. But I want to use glasses with attached LED lights. On amazon I found this one for example: AO Safety Light Vision.

Unfortunately all glasses that Amazon sells use 2 batteries or more. That means I have 3V or more available. Using an IR LED with 3V means they get burned immediately. I want to avoid to use resistors. So do you guys have an advice which glasses would suit best? Or in which way did you build your head tracking devices?

Thanks in advance,
Peter



Offline atomriot

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Reply #1 on: January 21, 2008, 01:44:11 PM
if your forward voltage for each LED is 1.5 then you can hook 3v's to 2 LED's without a resistor.

Details, details. Things to do. Things to get done. Don't bother me with details, just tell me when they're done.
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James Lionel Price



Offline Peter

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Reply #2 on: January 21, 2008, 02:57:26 PM
sure but the glasses use 3v each LED ... that's the main problem



Offline atomriot

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Reply #3 on: January 21, 2008, 03:43:00 PM
if you dont want to use resistors, then use 2 LED's

other than that your options are change the power source or use resistors.

or i guess try and find a 3v LED

Details, details. Things to do. Things to get done. Don't bother me with details, just tell me when they're done.
--
James Lionel Price



Offline Peter

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Reply #4 on: January 21, 2008, 03:45:07 PM
ok thanks for that answer.

but i thought there are some experiences with special glasses and LEDs and somebody could tell me.
 :)



Offline Demonic69

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Reply #5 on: January 23, 2008, 08:11:58 AM
Just stick in a 1.5v cell battery. Pretty much any that will fit will work. Have you tested the IR LEDs yet? Are they def using 3v or are they using resistors anyways?



Offline demotis

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Reply #6 on: February 01, 2008, 03:15:18 PM
I had a problem like this with a pair of glasses I purchased. The existing LED was a 3V LED and I needed to put in wide angle UV LEDs. The ones I had were 1.5 volt and the case did not have the room to include a resistor.

Solution: Get a piece of aluminum round bar that is the length and diameter of the battery. This must be round bar and not tubing, as the ends need to be solid. I say aluminum to cut down on weight but any metal bar will work. Use this in place of the second battery.

I thought about just rewiring the housing to exclude the second battery, but since this is a temporary solution and is easy to reverse I went with this way, incase I ever have the need to put in a 3V LED.



Offline OasisGames

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Reply #7 on: February 03, 2008, 02:26:23 PM
I'm considering going with this setup, and while searching around on the internet for the appropriate LEDs (which I'll probably end up buying from RadioShack) and this AOSafety goggles, I came across this little bit of information on Amazon:



(Note: Some slight editing, there was a 9v battery clip before the wiimote in the second part)

So, yeah, these goggles, some space fillers, 1.5v cell batteries and the IR LEDs should do it?



Offline forestial

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Reply #8 on: March 04, 2008, 11:58:09 AM
Just stick in a 1.5v cell battery. Pretty much any that will fit will work. Have you tested the IR LEDs yet? Are they def using 3v or are they using resistors anyways?
Does anyone know of a source for 1.5V cell batteries that are 20mm in diameter?

The glasses I bought use 2x3V CR2032 batteries for each LED.  I want to remove these batteries and replace with a single 1.5V battery, and replace the LED with a (1.5V) IR one.  So far I can't find any battery that is 1.5V and the same size as a CR2032.  Tried Radio Shack, Batteries Plus and searched the web without success.



Offline Hopka

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Reply #9 on: March 26, 2008, 04:21:19 PM
Using an IR LED with 3V means they get burned immediately.
Have you tried that?

Because I'm using an LED that has a forward voltage of 1.3V (LD274/Q62703-Q1031) with 2 button cells and it works just fine. With only one button cell it doesn't shine as bright.



Offline ISOHaven

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Reply #10 on: May 07, 2008, 08:58:17 PM
Using an IR LED with 3V means they get burned immediately.

That's false.  Using an IR LED that can't handle 3V means it will eventually burn out prematurely.  However even a 1.6V Max IR LED will be ok with a 3V source as long as you keep the operation times down.  I've been using mine just fine for a long time (1.6V with 3V) and it works great.  The longest I ever had them turned on was probably around 15 minutes.



Offline PixelPartner

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Reply #11 on: May 09, 2008, 11:56:50 AM
I prefer a setup without batteries and even LEDs on my head  :D
It even extends to 6DOF tracking and full colour stereo3D viewing on ANY monitor !
It's open hardware and affordable.
BEAT THAT ...

Have a look at my post in the Other section :

I just started an open hardware project as a building block for all sorts of head tracking AND stereo3D related Wiimote projects ...