Ostar leds, what is there to know about them?

[3rd_shift]

I'm starting to wonder what devilish flashlight mods one can do with these turkeys.
Somebody already came up with a 1000 lumen light with just 3 of these. :wow:
So.... why not 4?
I'm looking for links and contact info for these solid state wonders, thanks.

 

[MikeRD03]

Hi 3rd_shift,

I´ve already done my own diving light based on the new OSTAR emitter. It´s a very small formfactor light with four(!) OSTARs and separate stepup drivers in a handmade electronic in it. So on paper the light has over 3500 lumen lightoutput and can keep up with high end HID diving lights around 35-50W.
Although it is not a flashlight you might can learn something for your own project. But keep in mind the produced heat have to go somewhere - something divers don´t have to worry about very much -luckily.

Here´s the link : http://www.tauchfunzel.de/OSTAR1_en.htm

cheers
MikeRD03

 

[ktronik]

Hi 3rd_shift,

I´ve alread done my own diving light based on the new OSTAR emitter. It´s a very small formfaktor light with four(!) OSTARs and separate stepup drivers in a handmade electronic in it. So on paper the light has over 3500 lumen lightoutput and can keep up with high end HID diving lights around 35-50W.
Although it is not a flashlight you might can learn something for your own project. But keep in mind the produced heat have to go somewhere - something divers don´t have to worry about very much -luckily.

Here´s the link (sorry, german only so far - take bablefish): http://www.tauchfunzel.de/OSTAR1.htm

cheers
MikeRD03

OOhh my... that would be very bright... you could put a poor fish's eye out with that!! Well done

May I ask where you got the optics / reflectors??


are thier infact reflectors avab for this LED??

thanks

ktronik

 

[MikeRD03]

Hi ktronik,

What u see is no plastic optic but all well known parts to busy cpf reader ;-)
It´s a moded McR-20J reflector that works very well with the OSTAR emitters (has to be sanded). The lens on top is just a little boost to get more lumens strait forward. It´s a tiny PCX lens from surshed plus. ;-)
This combination get up to 32k lux with aprox 3500-4000 lumen out of a 50x40mm cylinder at 60W power consumption.

cheers,
MikeRD03

 

[monkeyboy]

Where did you get the new 1000lm ostars from? I didn't know that they had been released yet.

 

[ktronik]

Hi ktronik,

What u see is no plastic optic but all well known parts to busy cpf reader ;-)
It´s a moded McR-20J reflector that works very well with the OSTAR emitters (has to be sanded). The lens on top is just a little boost to get more lumens strait forward. It´s a tiny PCX lens from surshed plus. ;-)
This combination get up to 32k lux with aprox 3500-4000 lumen out of a 50x40mm cylinder at 60W power consumption.

cheers,
MikeRD03

I see now, thank you for letting me see the light... McR-20 (joker?) you felt the 'joker' version worked better?? & how much did you take off the bottom??

approx, what do you think the difference between having the PCX lens or NOT?? how many LUX difference did you find it made??

Have you had any of the 6 'die's' die??

Below I have a one piece CNC heatsink / housing... with your knowledge, & given that this housing will be 'convection' cooled when riding downhill...

Do you think I will 'cook' the ostar LED's in this?? (full power only on fast down bits)

thanks again for your help

best

Kerry

 

[MikeRD03]

I McR-20 (joker?) you felt the 'joker' version worked better?? & how much did you take off the bottom??

Well I choosed the Joker Version cause it´s already a bit "sanded" in comparision to the normal version - so I had less work to do. But I think die normal one is also OK. I don´t know exactly how much I took off but was a lot (around 1mm height less). Just sand step by step and try how it´s going..

approx, what do you think the difference between having the PCX lens or NOT?? how many LUX difference did you find it made??

The differnce is about 20% in my setup. But under water every photon counts. You have to test it on your own if it make sense in a bike light.

Have you had any of the 6 'die's' die??

No, so far a worked with eight of these emitters and they all are 100% OK.

Below I have a one piece CNC heatsink / housing... with your knowledge, & given that this housing will be 'convection' cooled when riding downhill...

Looks like a dammed good piece of work what you have done. Is that "Tristar" reflector out of the shelves or is it selfmade?? I´m still looking for a Ostar-tristar-reflector with around 25-27mm diameter for each reflector.

Do you think I will 'cook' the ostar LED's in this?? (full power only on fast down bits)

That´s hard to say but without wide cooling ribs I doubt three emitters are cooled down enough. My lamp shuts down automaticaly after around 1 Minute with all four on cause the emitter board reaches 70 degree celsius. But of cause it´s not designed to work above the water. ;-)

cheers
MikeRD03

 

[MikeRD03]

Hi monkeyboy,

Where did you get the new 1000lm ostars from? I didn't know that they had been released yet.

Yes, it´s out in the wild, but there is only one place to go as far as I know.
Since Osram is a german firm it is ony available in europe now. Search for RS-Component - they have online shops around in europe. Then just look for "OSTAR" and you got it.

If u have problems finding it let me know. Price: around 60 Euro (=78 dollar)

There ist only the version WITH lens available now. For reflector use u should remove that lens for much better performance. U can find the How-to on my homepage, too.

Cheers
MikeRD03

 

[ktronik]

Well I choosed the Joker Version cause it´s already a bit "sanded" in comparision to the normal version - so I had less work to do. But I think die normal one is also OK. I don´t know exactly how much I took off but was a lot (around 1mm height less). Just sand step by step and try how it´s going..




The differnce is about 20% in my setup. But under water every photon counts. You have to test it on your own if it make sense in a bike light.



No, so far a worked with eight of these emitters and they all are 100% OK.



Looks like a dammed good piece of work what you have done. Is that "Tristar" reflector out of the shelves or is it selfmade?? I´m still looking for a Ostar-tristar-reflector with around 25-27mm diameter for each reflector.



That´s hard to say but without wide cooling ribs I doubt three emitters are cooled down enough. My lamp shuts down automaticaly after around 1 Minute with all four on cause the emitter board reaches 70 degree celsius. But of cause it´s not designed to work above the water. ;-)

cheers
MikeRD03

Wow thanks for the answers!!!

the reflectors I used (IMS20) are the same size as McR20's...thats why I was interested...

maybe I could use just one Ostar...the other 2 maybe some Q5 cree's...& only use the high beam on the fast down bits...

food for thought... thanks again

Best

Kerry

 

[MikeRD03]

Hi ktronik,

Sound like a good idea this mixed mode. With only one Ostar the cooling should go fine. Let me know if it works

cheers,
MikeRD03

 

[ktronik]

Where did you get the LED are you using??

thanks

Kerry

 

[MikeRD03]

Hi,

I already answered that - look up to post #8 ;-)

cheers
MikeRD03

 

[ktronik]

Oh I see missed that one... thanks...

I can run 2 LED from my hub dynamo & maybe one OSTAR from a 29.6v battery pack...

thanks again

Kerry

 

[monkeyboy]

Hi monkeyboy,



Yes, it´s out in the wild, but there is only one place to go as far as I know.
Since Osram is a german firm it is ony available in europe now. Search for RS-Component - they have online shops around in europe. Then just look for "OSTAR" and you got it.

If u have problems finding it let me know. Price: around 60 Euro (=78 dollar)

There ist only the version WITH lens available now. For reflector use u should remove that lens for much better performance. U can find the How-to on my homepage, too.

Cheers
MikeRD03

OK found it. Thanks.

http://rswww.com/cgi-bin/bv/rswww/s...cddaddlldfgllgcefeceeldgondhgj.0&cacheID=ukie

Am I right in thinking

LE UW E3B is the code for the new 1000lm model (6 chips w/lens) and

LE W E3B is for the old model?

 

[MikeRD03]

Yep, that´s correct!

 

[Essexman]

Frean make a couple of reflectors for the ostar LED, here's a link to the datasheet -

http://www.fraensrl.com/images/Fraen_FRC_Datasheet.pdf

Rather large Dia at 34.5mm, but I'm sure someone could make use of them.

 

[chris_m]

Yes, it´s out in the wild, but there is only one place to go as far as I know.
Since Osram is a german firm it is ony available in europe now. Search for RS-Component - they have online shops around in europe. Then just look for "OSTAR" and you got it.

If u have problems finding it let me know. Price: around 60 Euro (=78 dollar)

Woo - I even get a 20% discount on that at RS (we have a contract with them in work). If anybody is interested I can get them for £26.70 (~40 Euro / $54 at today's rate).

Might just have to make myself a single LED headtorch!

 

[flex76italy]

Woo - I even get a 20% discount on that at RS (we have a contract with them in work). If anybody is interested I can get them for £26.70 (~40 Euro / $54 at today's rate).

Might just have to make myself a single LED headtorch!

Very interesting this price, you open an interesting thread?

 

[MikeRD03]

From what I know so far I can imagine that one OSTAR in a pretty big reflector can be a real eyeburner with lots of lumen. I think >40k lux and much throw would be no problem at all. These litte Ostar has a light density that can be compared to the better cree chips..but is has six of that

Only problem of this device is the Vf of >19V

cheers
MikeD03

 

[3rd_shift]

Looks like a good led for a variety of boating lighting applications.
Last I heard, some boats have 24 volt systems.
Some big rig heavy trucks also have a 24 volt circuit.
(Mainly used to start the truck on cold mornings though.)
:thinking:

Too bad it's six instead of 4 led dies.
Looks like Osram missed a chance to embarrass other 4 die leds at thier own game. :shrug: