can someone help me destroy / Test an emitter? (that I supply!)

[Ronin42]

help,

I need someone’s help to test an emitter.

What I am looking for is somone who has the bench power supply who can mount one on big heat sink and crank em up to see where they turn from “red” to “angry blue” aka fried.

They might fry at different settings depending on voltage and amprage?

Any takers (I will supply the emitters to “test”

I am seeing different numbers from the spec sheets (plus I am not the most Electrical savvy guy) so I figured, a good ol emperical test might clarify the matter.

Cree Photo Red

cree part number
XPEPHR-L1-0000-00901 (p5 aka 14 aka the higher of the two photo reds)

Mounting Style: SMD/SMT

Power Rating: 3.5 W (not at all sure)

Series: XP-E Color

Maximum Operating Temperature: + 150 C

Viewing Angle: 130 deg

http://www.cree.com/~/media/Files/Cree/LED%20Components%20and%20Modules/XLamp/Data%20and%20Binning/XLampXPe.pdf

(page 6 from spec sheet)

Color Photo Red
Min. (nm) 650
Max. (nm)670
Min. Radiant Flux Base Order Codes Min. (mW) @ 350 mA
Order Code XPEPHR-L1-0000-00901
Group P5
Group 14
Flux mW(350)
DC forward current - photo red, mA 1000
Forward voltage (@ 1000 mA) - photo red V 2.5

Illumination Color: Red

Wavelength: 670 nm

Luminous Intensity: -

Luminous Flux/Radiant Flux: 80.6 lm

Forward Current: 350 mA

Forward Voltage: 2.1 V

[southland]

up

[Otanacious]

I vote djozz

[HKJ]

I wonder if a photo sensor (LDR/photo diode/lux meter) will see the color change. If it does it would be a fairly easy to make a voltage & brightness vs. current curve past the point where the diode dies.

[djozz]

I just made a 14500 budget zoomie with a 655nm Rebel led on a Sinkpad (accidentally dedomed), but before that (and before the dedome) I did a very quick output test with the bare led on a power supply (without recording the the numbers) to see at what current it maxes out. Maximum was at 2.3A, with ~70 lumen output (you don't see much at 655nm) and 2.8V voltage. I made the zoomie with 1.83A current (7135-regulated), the output is at 90% of max.

There is a fair chance that the Cree XP-E2 version of this led behaves quite the same as the Rebel so if you keep the current slightly under 2A my bet is that you drive it close to max.

If you want to be certain I can always do a dedicated output-test of your led.

[Mitko]

Red zoomie djozz?

I smell a boar hunting flashlight here It could be very good exacly for that

You hunt ?
Thats what red zoomies are for

I edited the pic , cause the boards were shot by 300 magnum caliber….not that plesent view though

[JamesB]

The zoomie might just be a special order from someone in the red light disctrict who wants to blend in.

[djozz]

@Mitko

Red zoomie djozz? I smell a boar hunting flashlight here It could be very good exacly for that You hunt ? Thats what red zoomies are for

I edited the pic , cause the boards were shot by 300 magnum caliber....not that plesent view though

What do I do wrong? Every time I build a flashlight for fun, there's some blood-thirsty hunter interested!

(no boars in Amsterdam, just pigeons) EDIT: and lots of red lights, yes

[luminarium_iaculator]

@djozz

I just made a 14500 budget zoomie with a 655nm Rebel led on a Sinkpad (accidentally dedomed), but before that (and before the dedome) I did a very quick output test with the bare led on a power supply (without recording the the numbers) to see at what current it maxes out. Maximum was at 2.3A, with ~70 lumen output (you don't see much at 655nm) and 2.8V voltage. I made the zoomie with 1.83A current (7135-regulated), the output is at 90% of max.

There is a fair chance that the Cree XP-E2 version of this led behaves quite the same as the Rebel so if you keep the current slightly under 2A my bet is that you drive it close to max.

If you want to be certain I can always do a dedicated output-test of your led.

Djozz tried everything. Well done.

I cant find red XP-E2(or equivalent emitter) anywhere.

[Mitko]

What do I do wrong? Every time I build a flashlight for fun, there’s some blood-thirsty hunter interested! Wink

(no boars in Amsterdam, just pigeons)

Come on When its in the dish its okay, but hunting its not…

Actualy boars and pigs are daltonists…or lets say nearly daltonist: they react on blue and UV light/cold white too
My experience shows that the best for the boar hunt is 2700-3000k, red works too but it aint good for the human eyes and cant be used on a long turn base

Djozz, the boar hunting is a thing to remember…its a whole process, the preparation, the waiting, stories that have been told meanwhile/and after….you have to experience it definately: believe me or not, there is a great chance for you to become blood-thirsty too :bigsmile:

[n10sivern]

Hmmm I like bacon!!!

[djozz]

@Mitko

What do I do wrong? Every time I build a flashlight for fun, there’s some blood-thirsty hunter interested! Wink (no boars in Amsterdam, just pigeons)

Come on When its in the dish its okay, but hunting its not… Actualy boars and pigs are daltonists…or lets say nearly daltonist: they react on blue and UV light/cold white too My experience shows that the best for the boar hunt is 2700-3000k, red works too but it aint good for the human eyes and cant be used on a long turn base Djozz, the boar hunting is a thing to remember…its a whole process, the preparation, the waiting, stories that have been told meanwhile/and after…you have to experience it definately: believe me or not, there is a great chance for you to become blood-thirsty too :bigsmile:

ehhmm, well, that sounds cool, and btw I find hunting quite ok, I may even like the stories, but for my actual carnivorous needs I myself prefer the supermarket

[n10sivern]

I’d almost rather get into it with wild hogs than some of the rabid cows that roam the supermarket! They are bigger than any hog I’ve shot.