Toshiba yellow 10mm 23,000 mcd LED ?

vcal

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by KenB:
Has anyone tried this one?<HR></BLOCKQUOTE>

Where did you see that LED?
 

vcal

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by KenB:
www.hosfelt.com
they also have a 10mm white for $5.99
<HR></BLOCKQUOTE>
I sure can't recommend that
particular LED, cos I bought one and it's output was SUPER disappointing...
frown.gif
 

The_LED_Museum

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by KenB:
Has anyone tried this one?<HR></BLOCKQUOTE>

I might have a bag of these... let's see...

Let's see... Hosfelt # 25-342...yup that's the one.

The beam is square in shape, very narrow with a darker spot in the center.

Taking picture... click!
Downloading...renaming...moving...cropping...uploading...
25-342.jpg

In this picture, the LED was fired at the target from 3 FEET, so you can see its beam is very narrow. That is one reason why its candela rating is so high.

At 30mA drive current, my meter says 23.2 foot-candles in intensity. For this measurement, the LED was fired at the sensor (the diamond-shaped thing in the picture) from 12" away.

Hope this helps.
 

The_LED_Museum

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by videocal:
I sure can't recommend that
particular LED, cos I bought one and it's output was SUPER disappointing...
frown.gif
<HR></BLOCKQUOTE>

I can't recommend their 10mm white either.
I've got a bag of those things, and I can't give those fu$&^@%#ers away!
mad.gif
 

Badbeams3

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Thanks Craig, it does not look to impressive...gee...you really do have a museum their...umm you wouldn`t happen to have the white 10 mm would you?
 

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by KenB:
Thanks Craig, it does not look to impressive...gee...you really do have a museum their...umm you wouldn`t happen to have the white 10 mm would you?<HR></BLOCKQUOTE>

Yeah... I've got a whole bag of those things.
blush.gif

I'll go look for them. I think they got buried in the you-know-what, but I have a good idea of where to start looking.
grin.gif
 

Badbeams3

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Thats ok Craig, I`ll take your word for it...probably narrow with that square shape...thanks Craig and Doug
 

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by KenB:
Thanks Craig, it does not look to impressive...gee...you really do have a museum their...umm you wouldn`t happen to have the white 10 mm would you?<HR></BLOCKQUOTE>

I couldn't find the bag, but I had my original pair of evaluation specimens in a plastic case.

25-367.jpg

Picture was deliberately underexposed to try and capture the distinctly bluish center.

In reality, the beam consists of an elliptical central hot zone, bright cyan in color, surrounded by a much weaker, white coma. It looks like a comet without its tail.

Measured 10.6 foot-candles from the distinctly bright cyan central beam area.
 

vcal

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by telephony:
I couldn't find the bag, but I had my original pair of evaluation specimens in a plastic case.



Measured 10.6 foot-candles from the distinctly bright cyan central beam area.
<HR></BLOCKQUOTE>
I can't show you a picture of mine yet, but it measures only 9.5 footcandles..
frown.gif

Btw-Craig, do you know whether Nichia or Toshiba makes that 10mm wht.?
 

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by videocal:

I can't show you a picture of mine yet, but it measures only 9.5 footcandles..
frown.gif

<HR></BLOCKQUOTE>

How do you measure yours?
Do you fire the LED directly into the sensor from a foot away, or some other way?

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
Btw-Craig, do you know whether Nichia or Toshiba makes that 10mm wht.?
<HR></BLOCKQUOTE>

I believe Toyoda Gosei made that one, but I cannot say with absolute, 100% certainty.

I can tell you that Toshiba isn't (or wasn't) in the white LED racket when these things were made, and the design of the internal leadframe is not Nichia.
 

Badbeams3

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How many foot candles does...say a Photon with new batts show from 1 foot away Craig or Doug?
 

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by KenB:
How many foot candles does...say a Photon with new batts show from 1 foot away Craig or Doug?<HR></BLOCKQUOTE>

Let's find out... it starts at about 27 foot-candles, and quickly drops like a bomb, even though you can't observe the difference with the eye.

It quickly sinks to about 20 foot-candles, then falls much more slowly after that.
 

Badbeams3

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Doug, does your`s show about the same?...Craig, how many does the Arclight show?
 

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by KenB:
Doug, does your`s show about the same?...Craig, how many does the Arclight show?<HR></BLOCKQUOTE>

about 18.4, and it stays there instead of sinking.
This is about like a Photon after 1 minute.
 

Badbeams3

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Thanks Craig, I wish CMG would up the step-up in the infinity to the Photon level...that would be ideal.
 

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