Author Topic: Electronics 101 - Basics for those who want to make their own IR-Pen.  (Read 157403 times)

Offline Francisco

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Reply #30 on: June 07, 2008, 09:01:30 PM
I will be waiting your tests!


Offline Adrian

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Reply #31 on: June 12, 2008, 01:03:51 AM
Hi Ben - I too am a teacher and are keen to give this project a go. I have ordered all the parts and I was wondering what bluetooth setup you have - are you using an adapter or laptop inbuilt?



Offline benpaddlejones

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Reply #32 on: June 12, 2008, 03:43:11 AM
Adrain
My school laptop:
HP Internal Radio
Widcomm Stack
Small process to connect but works fine

Home Desktop:
ITV USB Radio
BlueSolie Stack
Very easy to connect

If you need a Bluetooth Device buy a dongle and make sure has Bluesolie Software. If you have internal try setting it up if you have problems post to "Bluetooth & Connectivity" section and the user base will have no problems in helping you.

benpaddlejones


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Offline jamesKL

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Reply #33 on: September 05, 2008, 09:42:52 AM
so basically is about the peak wavelength and the viewing angle is important rite may i know what is beam angle and how is it calculate?

Thanks

James



Offline benpaddlejones

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Reply #34 on: September 05, 2008, 06:10:18 PM
jameskl
It's all in the datasheet, just download or ask for it from your supplier.

Ben :)


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Offline jamesKL

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Reply #35 on: September 06, 2008, 10:07:41 PM
Ben i know the datashet can be obtain easily, but now the problem is I have seen the beam angle written like this "+/-25" and some written like this "40". Is the the +/-25 means 50 degree? just want o clear this doubt



Offline benpaddlejones

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Reply #36 on: September 07, 2008, 03:18:21 AM
JamesKL

40 degree means 20 each side
20+/- means 20 each side

Make sure you get the information from the datasheet as retailers often get it wrong. You also need to look at the irradation spectrum (a visual representaion of a cross section of the detectable light) as the 40 degrees may only occur very close to the source.

Benpaddlejones


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Offline fpill

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Reply #37 on: September 12, 2008, 06:25:25 PM
Has anyone actually done a comparison (tracking movement, max distance to Wii remote....) of similar LED's with only a difference of viewing angle?  I'd be more interested if the comparison was done on a whiteboard, not a computer screen.
For example TSAL6100 vs TSAL 6200?

fpill

I'm not suggesting these are better than TSAL 6400, just looking for and actual comparison of viewing angle not just theory.



Offline benpaddlejones

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Reply #38 on: September 13, 2008, 02:49:22 AM
fpill
I tried but was unable to produce a test consistent enough to provide valid results. I found that no matter what I did I couldn't even get consistency from the same pen. As the holding angle, smoothing function and hand speed have considerable input into the outcome.

Whilst I am personally a huge risk taker and a big believer in "if it ain't broke, brake it anyway" this is in my opinion a case of "if it ain't broke, don't fix it". The Vishal TSAL6400 works fantastic, lets focus our energy on a more consistent connection agent and Boonjins awesome work with Wiimote Smoothboard!

Benpaddlejones :)




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Offline Francisco

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Reply #39 on: October 06, 2008, 08:35:38 AM
Updated!
Now with the 'positive' vs 'negative' IR Led info.
"As in other diodes, current flows easily from the p-side, or anode, to the n-side, or cathode, but not in the reverse direction."

Check it here:
http://clinik.net/wiimote/wiimote_info_my_pen_2.php

The new image only:


Cheers
Francisco




Offline eyucel

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Lesson 7: How do I know my IR-LED works???

Hi Ben,

I suggest using freetrack 2.2 http://www.free-track.net/download.php?id=FreeTrack_V2.2
Bu using this free program, you can easily check whether your led is working  or not, also you can get information when it is seen by the wiimote, you can see how big the IR blob is.

Take care



Offline Francisco

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UPDATED
The Missing Test ;)
With the help (or the leds) of Undcon and my leds I made this test:

Vishay TSAL 5300 vs Vishay TSAL 6400

Sorry about the technical conditions and the bad photos...
And... Undcon: Sorry the long delay... but here they are!!!
'Read' this images with the Datasheet of the two Leds (links in my wiimote web page http://clinik.net/wiimote/wiimote_info_my_pen_2.php -hidden on vertical text).



about my new toy... check Arduino stuff in this good Portuguese store: http://inmotion.pt/








UPDATE after Ben :)
New set, new fotos, and changing the position of ir leds. Same results!





(NOT manipulated)



(NOT manipulated)



(MANIPULATED)

« Last Edit: February 08, 2009, 06:16:34 PM by Francisco »



Offline benpaddlejones

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Francisco
Interesting, great evidence.

Could you do the exact smame setup & tests but swap the IR-Leds just to make sure nota  function of woire length or location in the circuit.

This will confirm that the TSAL5300 is definately much brighter head on will comment should be choice for rear displays/tracking. But the TSAL6400 is slighly brighter at 90 degree's and better for centrally placed Wiimotes.

benpaddlejones :)


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Offline benpaddlejones

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Francisco
Your tests provide a really interesting visual on the radient intenisty arc v angle of intensity. Given that both TSAL5300 & TSAL6400 output high volumns of IR in the 940nm (-+10) range that the Wiimote demands, the type of light is identical for both IR-Leds.

What makes the difference is the shape of light. I think this test validates that the TSAL5300 is a better choice for close range or rear tracking views. But the clear round IR from the TSAL6400 will make it preferential for long range or less oblique Wiimote views.

That said given that many are now diffusing the IR-Led (see: http://www.wiimoteproject.com/ir-pens/how-well-does-diffusing-the-led-work/) I think thye will both be much of muchness. exept in the close range and rear tracking orientations in which yes the TSAL5300 will have an advantage (diffusing the IR-Led, will even this advantage).

When I ran tests on the 100 odd IR-Leds over 6 months ago I didn't buy a TSAL5300 because it was so close to the TSAL6400.

Can you please also post more info (in a new post under http://www.wiimoteproject.com/ir-arrays/) on the fancy device you have plugged the IR-Leds into, looks like those wanting to make an IR-Array may find it a handy short cut.

benpaddlejones :)


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Offline zsoc

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Hi all!
My question is the following.
IR LED with 880nm is enough, or I have to buy with 940nm?