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By: wyojustin (offline) on Saturday, June 19 2010 @ 08:52 AM PDT (Read 6412 times)  
wyojustin

I just received a 10-pack of the awesome 10mm RGB LEDs. They work great, but they don't seem to conform to the data sheet.

I measure 4.3mm across the pins from outside edge to outside edge and .5mm lead diameter. That leaves (4.3 - 4 * .5) / 3 = 2.3 / 3 = .766666 mm or about 3/4 mm for each gap. The pin spacing is labeled as 1.25 mm in the data sheet. Can anyone else confirm this?


Thanks
Justin


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By: Windell (offline) on Saturday, June 19 2010 @ 11:50 AM PDT  
Windell

Yes, that does look like an error in the datasheet. In fact, that's one of the *least clear* dimensioned drawings that I've ever seen. (What the heck is that 2.54 dimension supposed to be?) I'll see if I can get the manufacturer to provide a better datasheet.

I do have a printed catalog from them which has a *good* drawing for the 5 mm version, at least, and that does have the same pin arrangement. It looks like the pin-to-pin center-to-center dimension is supposed to be 1.4 mm, so that the edge-to-edge spacing should be about 3*1.4=4.2 mm + 0.5 mm for the pin width, or 4.7 mm total. The gap is then supposed to be 1.4-0.5 = 0.9 mm. Honestly I think that your readings agree with *these* numbers fairly well, given the typical variation in LEDs-- 0.4 mm overall would probably be within the sum of normal variation and my measurement error.

I am sorry for the trouble, and I'll see if I can get a better datasheet to post.


Windell H. Oskay
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By: wyojustin (offline) on Wednesday, June 23 2010 @ 05:12 AM PDT  
wyojustin

Thanks, that would be excellent! I agree on the drawing.

Justin


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By: Anonymous: Anool () on Thursday, June 24 2010 @ 01:37 AM PDT  
Anonymous: Anool

the way I see it, 1.25 is the center-to-center spacing between individual pins.
It should actually be 1.27mm (0.05"Wink.
The spacing between alternate pins (1-3 or 2-4) will then be 2.54mm (0,10"Wink.
And the spacing between pins 1 and 4 will then be 1.27x3 = 3.81mm (0.15"Wink.
Add 0.25mm on each end (radius of each lead) and you get 3.81 + 0.25 + 0.25 = 4.31mm

Anool : anool.m@gmail.com





       
   
By: Windell (offline) on Thursday, June 24 2010 @ 10:19 AM PDT  
Windell

We've just posted an updated datasheet. I am sorry for the confusion and for the errors in the previous version.


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