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Christos #1 03/12/2008 - 13h09

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I want to make a 3 point cap and I need some help.
I want to take the 3 osram SFH485P LEDs and make a serial(only serial) assembly using a battery. What battery type do I need for this? Are these types of batteries you will suggest easy to find?
Also,I have in mind some other types of LEDs which have an angle of 20 degrees. I read that you need to do a little tweak to make them work for freetrack. What is this tweak and how am i supposed to do it?
Thanks!
Edited by Christos on 03/12/2008 at 13h10.
babasior #2 03/12/2008 - 15h28

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For LED 20° is too few ....  :snif:

You must use LED with better angle of degrees 65° or more ... (40° ultra mini ...  :wacko: - To have a better angle, you must to have a flat  LED on top (look for example a SFH485P, you will see what i want to tell you ....))

Contact Tristan68 to have better information about that ...

For battery, i use 2 AAA 1,5volts (or 2 AAA 1,2 V 1800 mini or best with 2800 mah) in serial with an R for each LED (so i use 3 R with 3 points caps ...)

Look "3 dots cap build" document included in freetrack 2.2 package sofware for more informations and pictures ...
Babasior.
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Christos #3 03/12/2008 - 16h21

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I found an old post by tristan saying that if I use an IR modded webcam I should put at the LED assemby wizard 50mA tops. I will use an IR webcam though. Will it hurt if I make it on 60-70mA for better brightness?

this is his post http://forum.free-track.net/index.php?showtopic=1053

I also found out that he thinks that the forward voltage of the osram sfh485 is 1.5v but this page here says that it is 3!
http://www.darlas.gr/comersus/store/comersus_viewItem.asp?idProduct=1036762

And this here as well!http://admin.applegate.co.uk/listings/stock/item/645531.html

This makes a big difference as if the osram really has 1.5v then I will use a 9volt serial for sure! Who am I going to beleive? the seller or tristan?  :unsure:

So Is this assembly CORRECT using Tristan's data about the OSRAM SFH485P?
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Edited by Christos on 03/12/2008 at 16h50.
didja #4 03/12/2008 - 19h17

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Yep, it's definitely correct :) . The SFH485P requires only 1.5V, no more, and that's for sure.

60mA is too much if your webcam is IR modded. 50mA is a maximum, you should lower the intensity a little bit more. 60-70mA are required only for non-modded webcam so IR can get through the filter.

Rémy :D
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Christos #5 03/12/2008 - 20h28

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Thanks guys! That makes it all so easier than I first thought. Going to set up freetrack as long as I get this new sim in my hands.
It is the best WWI aviation simulator around. It will be released in a matter of weeks(if not days). Check it out if you want. It is freetrack compatible as the game is based on MIcrosoft's CFS3. But it is a TOTALLY different experience than the not-so-good CFS3  :) .
http://www.overflandersfields.com/

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