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By: Anonymous: a wolf () on Monday, July 05 2010 @ 07:44 PM PDT (Read 7815 times)  
Anonymous: a wolf

my 8 panel coffee table is acting funny.
(so it can't be a "construction" issue)
there is a group of 4 leds in a single panel that are on constantly.
indicated below:

00000000
00000000
00000000
00100000
00010000
00100000
00000000
00100000

constantly is not quite the right word...
if i wave my hand over the table, ALL of the leds "pulsate" including these 4.
but otherwise, they are on all the time.
whether the room is totally dark, or very bright.

actually, i have a few groups (not the same shape) that behave like this, but the other groups are pretty dim. this group of 4 is very bright.

help!





       
   
By: Windell (offline) on Monday, July 05 2010 @ 07:52 PM PDT  
Windell

Was this a kit that you put together, or a pre-assembled unit?

You can probably identify that the LEDs work in groups of 5. When one of them fails-- probably due to a preexisting weakness of some sort --the other four will get brighter, and so the fix is to replace that one LED with a new one.


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By: Anonymous: a wolf () on Monday, July 05 2010 @ 07:52 PM PDT  
Anonymous: a wolf

that shortly after building my kit, i conferred with Windell about making my table "more responsive" within my glass covered coffee table.
Windell suggested changing 3 resistors per board to increase the brightness of the built-in IR LEDs. that worked very well.

don't know if that is related...
but that was almost a year ago, and the group of 4 that stays on (nearly) continuously suddenly appeared a few days ago, with "nothing changed."

???





       
   
By: Anonymous: a wolf () on Monday, July 05 2010 @ 07:57 PM PDT  
Anonymous: a wolf

you nailed it!
there is a dead LED.
i didn't notice till your response, when I looked for the group of 5.

Wendell: 8 minutes to reply on a holiday weekend?
Could you be a little quicker next time? :-)

----

uh... do i have to get a "carefully matched" LED?
or will a "similar one" do?
whatever leftovers i had from the kit I tossed long ago!





       
   
By: Windell (offline) on Monday, July 05 2010 @ 07:59 PM PDT  
Windell

> 8 minutes to reply on a holiday weekend?

Actually just coincidence that I happened to check the forum at that moment; I'd been offline (er, elsewhere online, really!) for a while today. Smile


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By: Anonymous: a wolf () on Monday, July 05 2010 @ 08:07 PM PDT  
Anonymous: a wolf

these are the 10 mm white LEDs, right? not the 5 mm?
(i'm about to order from you.)





       
   
By: Windell (offline) on Monday, July 05 2010 @ 08:10 PM PDT  
Windell

The interactive panels usually come with 5 mm clear-lens LEDs, but do also work with 10 mm LEDs.


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By: Anonymous: a wolf () on Monday, July 05 2010 @ 08:11 PM PDT  
Anonymous: a wolf

thanks, i'll order the 5.





       
   
By: karlgg (offline) on Wednesday, July 07 2010 @ 11:54 AM PDT  
karlgg

Eek! Who in their right mind would throw away perfectly good electronics extras? *shudder*


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