More New Cree Goodness coming....

211 posts / 0 new
Last post
JaredM
JaredM's picture
Offline
Last seen: 9 months 2 weeks ago
Joined: 10/31/2011 - 13:33
Posts: 2645
Location: Pittsburgh, Pennsylvania

Like excess solder beads? You can remove them with a razor blade

https://fundrazr.com/osturaband

No affiliation, just a fan.

everydaysurvivalgear
everydaysurvivalgear's picture
Online
Last seen: 7 min 8 sec ago
Joined: 07/31/2015 - 10:25
Posts: 3826
Location: sydney australia (GMT+10)
JaredM wrote:
Like excess solder beads? You can remove them with a razor blade

I think these have to be filled but not sure how much is needed because its in the way of the centering ring. See the two beads one on each side of the LED its below the J? Its meant to be there but it would be better of in a different place.

Even if you put solder in the R position its a bad spot for the centering ring.

JaredM
JaredM's picture
Offline
Last seen: 9 months 2 weeks ago
Joined: 10/31/2011 - 13:33
Posts: 2645
Location: Pittsburgh, Pennsylvania

Ahhh. Yes. Poor placement indeed. I’d take a mini flat file or even an emery board and sand the solder blobs down a bit. Also, while it may be a pita, grooves could be filed into the centering ring. At least they are 180° apart, so the second idea is probably best

https://fundrazr.com/osturaband

No affiliation, just a fan.

thefreeman
thefreeman's picture
Online
Last seen: 50 sec ago
Joined: 01/06/2020 - 09:56
Posts: 1726
Location: France
Quote:
grooves could be filed in the centering ring

Or drill holes, probably easier.

djozz
djozz's picture
Offline
Last seen: 1 day 20 hours ago
Joined: 09/07/2012 - 17:04
Posts: 18318
Location: Amsterdam

I would use a scalpel with curved edge to cut away the solder.

Barkuti
Barkuti's picture
Offline
Last seen: 1 day 1 hour ago
Joined: 02/19/2014 - 14:46
Posts: 5636
Location: Alhama de Murcia, Spain

everydaysurvivalgear wrote:


Certainly bad board design, at least for flashlight users. It can be converted to 4S or “12V” voltage, but the connection points on the MCPCB are also rather close to the emitter and this could also cause problems with wide base reflectors.

Reflowing the emitter is also a choice, but of course only if you are able and have spare boards. Being thrifty, long ago I chose these

Please avoid fully quoting lenghty posts, namely with nested quotes. Trim quotes down to the essential. Helps with neatness and legibility. Thanks.

The human mind, and its programming, is at the forefront of a particular battle of The Light vs evil dark forces. Nearly every human being on this beautiful planet “Earth” has some sort of negative mind programming in its mind. And you better take care of your mind programming, or someone else will in this wicked world.

freeme
freeme's picture
Offline
Last seen: 2 hours 50 min ago
Joined: 11/14/2013 - 22:00
Posts: 11211

Desoldering pump should do the trick.

1thedeals.comyoutubeAstroluxNealsgadgetsolight

Boaz
Boaz's picture
Offline
Last seen: 2 hours 59 min ago
Joined: 11/07/2010 - 09:31
Posts: 8009
Location: Birthplace of Aviation

Micro shears  Just snip the tops off 

                 υμεις εστε το φως του κοσμου ου δυναται πολις κρυβηναι επανω ορους κειμενη

                            Dc-fix diffuser film  >…  http://budgetlightforum.com/node/42208

vestureofblood
vestureofblood's picture
Offline
Last seen: 1 week 4 days ago
Joined: 08/17/2012 - 15:21
Posts: 2035
Location: Missouri

Has anyone tested the 50.3 emitters in a direct drive setup yet? If so what kind of current did you get?

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
http://asflashlights.com/ Everyday Carry Flashlights, plus Upgrades for Maglite.

Hoop
Hoop's picture
Offline
Last seen: 1 day 25 sec ago
Joined: 12/20/2012 - 05:33
Posts: 1303
Location: land jurisdiction

According to the XHP50.3 datasheet the voltage is the same as XHP50.2 except that the thermal performance of the 50.3 is significantly better so the Vf should be just slightly higher due to that.

Speaking of the thermal performance: the XHP70.3 datasheet says .2° C/W thermal resistance! And the P4 bin will be available. This sucker might hit 10,000 lumens.

Scallywag
Scallywag's picture
Offline
Last seen: 4 hours 20 min ago
Joined: 01/11/2018 - 22:23
Posts: 2449
Location: Ohio, United States

Hoop wrote:
According to the XHP50.3 datasheet the voltage is the same as XHP50.2 except that the thermal performance of the 50.3 is significantly better so the Vf should be just slightly higher due to that.

Speaking of the thermal performance: the XHP70.3 datasheet says .2° C/W thermal resistance! And the P4 bin will be available. This sucker might hit 10,000 lumens.


That will be exciting. My L6 might need an upgrade.
ArtieT59
ArtieT59's picture
Offline
Last seen: 6 hours 17 min ago
Joined: 02/25/2020 - 17:55
Posts: 3593
Location: CT, USA

Scallywag wrote:
Hoop wrote:
According to the XHP50.3 "datasheet":https://www.mouser.com/datasheet/2/723/ds_XHP50_3-2399947.pdf the voltage is the same as XHP50.2 except that the thermal performance of the 50.3 is significantly better so the Vf should be just slightly higher due to that. Speaking of the thermal performance: the XHP70.3 "datasheet":https://www.mouser.com/datasheet/2/723/ds_XHP70_3-2399964.pdf says .2° C/W thermal resistance! And the P4 bin will be available. This sucker might hit 10,000 lumens.
That will be exciting. My L6 might need an upgrade.

I Will be buying a couple new convoys JUST to use this emitter in them. Very exciting

[FLF] Five Light Friday https://budgetlightforum.com/node/78749

Check out some of my new lights (picture heavy) and quick first impressions of them here: https://budgetlightforum.com/node/77180

My Sft40 beamshots / comparison thread: https://budgetlightforum.com/node/78100

The BLF GT with SFT40 (2300lm, 2700m+ @ 30 seconds!)
https://budgetlightforum.com/node/79561

ArtieT59
ArtieT59's picture
Offline
Last seen: 6 hours 17 min ago
Joined: 02/25/2020 - 17:55
Posts: 3593
Location: CT, USA

vestureofblood wrote:
Has anyone tested the 50.3 emitters in a direct drive setup yet? If so what kind of current did you get?

 

I don't  mean to sound dumb, but are there DD drivers for 6v/12v emitters? I didn't even know this existed... 

[FLF] Five Light Friday https://budgetlightforum.com/node/78749

Check out some of my new lights (picture heavy) and quick first impressions of them here: https://budgetlightforum.com/node/77180

My Sft40 beamshots / comparison thread: https://budgetlightforum.com/node/78100

The BLF GT with SFT40 (2300lm, 2700m+ @ 30 seconds!)
https://budgetlightforum.com/node/79561

Quadrupel
Quadrupel's picture
Offline
Last seen: 3 days 7 hours ago
Joined: 12/03/2017 - 10:40
Posts: 1144
Location: Lithuania

There are 3V emitters…

Scallywag
Scallywag's picture
Offline
Last seen: 4 hours 20 min ago
Joined: 01/11/2018 - 22:23
Posts: 2449
Location: Ohio, United States
ArtieT59 wrote:

vestureofblood wrote:
Has anyone tested the 50.3 emitters in a direct drive setup yet? If so what kind of current did you get?

 


I don’t  mean to sound dumb, but are there DD drivers for 6v/12v emitters? I didn’t even know this existed… 

There are. My L6 has one for the XHP70.2. As I recall, the 6V 50s tended to roast under direct drive.

Tom E
Tom E's picture
Offline
Last seen: 3 months 2 weeks ago
Joined: 08/19/2012 - 08:23
Posts: 15065
Location: LI NY

Definitely there are. We use an LDO in place of the D1 diode to knock the voltage down to run the MCU. The 7135's have a problem handling higher voltage at higher amps - I know, I smoked a few. This is why TA went with a resistor bank instead of a 7135 for the low channel -- works excellent with 6V designs, like he did for the BLF GT70 and others. I believe there are other 6V high output FET designed drivers as well.

Scallywag
Scallywag's picture
Offline
Last seen: 4 hours 20 min ago
Joined: 01/11/2018 - 22:23
Posts: 2449
Location: Ohio, United States

Tom E wrote:

Definitely there are. We use an LDO in place of the D1 diode to knock the voltage down to run the MCU. The 7135’s have a problem handling higher voltage at higher amps – I know, I smoked a few. This is why TA went with a resistor bank instead of a 7135 for the low channel — works excellent with 6V designs, like he did for the BLF GT70 and others. I believe there are other 6V high output FET designed drivers as well.


I miraculously have a 7135 working in my L6 but haven’t been able to replicate the experience in my SP70 – have blown a few, they all failed wide open interestingly. In the L6 the behavior is weird though, the 7135 channel is dimmer the higher the battery (input) voltage. Funny when fresh cells give a super-dim moonlight but when they’re low I can’t look directly at it anymore!
djozz
djozz's picture
Offline
Last seen: 1 day 20 hours ago
Joined: 09/07/2012 - 17:04
Posts: 18318
Location: Amsterdam

Poor little chip Crying

Scallywag
Scallywag's picture
Offline
Last seen: 4 hours 20 min ago
Joined: 01/11/2018 - 22:23
Posts: 2449
Location: Ohio, United States

djozz wrote:
Poor little chip Crying

Haha it will be a sad day when it quits on me!
everydaysurvivalgear
everydaysurvivalgear's picture
Online
Last seen: 7 min 8 sec ago
Joined: 07/31/2015 - 10:25
Posts: 3826
Location: sydney australia (GMT+10)

Thanks for the advice i ended up using a razor blade, i tried to put one of the XHP50.3 HI in a C8 and i shorted it and killed the boost driver sigh. Its not a great design for flashlights those few extra mm on a normal MCPCB really help. My solder joints where really low but i put tape on the reflector to be safe and the solder undone the tape lol. I also had a really low LED gasket in place and thickish gauge wire. I will reflow the LED onto another MCPCB.

On another note first time i have bought brand name solder and its great, a hardware store here is selling Weller solder 100g 1mm thick for like $10, on par with what i would pay from China for no name stuff. The solder joint was so shiny amazing stuff lol.

stephenk
stephenk's picture
Offline
Last seen: 7 hours 30 min ago
Joined: 01/30/2016 - 05:09
Posts: 2349
Location: Australia

Will the XHP70.3 allow flashlights to have better sustained brightness than the XHP70.2 ?

zak.wilson
Offline
Last seen: 4 days 21 hours ago
Joined: 09/29/2014 - 14:27
Posts: 1074
stephenk wrote:
Will the XHP70.3 allow flashlights to have better sustained brightness than the XHP70.2 ?

A newer generation of the same emitter family usually results in a modest increase in efficiency, so yes, though not necessarily enough to care about.

Ceilingbounce – flashlight testing and runtime graphs for Android | Zak Reviews – my flashlight reviews, with lots of runtime graphs

Tom E
Tom E's picture
Offline
Last seen: 3 months 2 weeks ago
Joined: 08/19/2012 - 08:23
Posts: 15065
Location: LI NY

According to the datasheets when comparing, the .3 does a little better with heat - drops less voltage per degree C, and thermal resistance at the junction is a little lower. Probably not enough to be noticeable. The .3 is available in P4 bin though, getting more lumens for free (no extra amps or heat), but again, low, maybe about 7% bump from P2. The Vf hasn't changed, so it should work well with existing drivers.

The biggest reason for 70.2 lights not having sustained brightness is the driver design and overall flashlight design. Because the LED is capable of high amps, high output, it's usually pushed hard in the design.

stephenk
stephenk's picture
Offline
Last seen: 7 hours 30 min ago
Joined: 01/30/2016 - 05:09
Posts: 2349
Location: Australia

Tom E wrote:

According to the datasheets when comparing, the .3 does a little better with heat – drops less voltage per degree C, and thermal resistance at the junction is a little lower. Probably not enough to be noticeable. The .3 is available in P4 bin though, getting more lumens for free (no extra amps or heat), but again, low, maybe about 7% bump from P2. The Vf hasn’t changed, so it should work well with existing drivers.


The biggest reason for 70.2 lights not having sustained brightness is the driver design and overall flashlight design. Because the LED is capable of high amps, high output, it’s usually pushed hard in the design.


Thanks. There are some XHP70.2 lights with good sustained brightness – Convoy M21C/D, Acebeam E70, Thrunite T2. Just interested to know if there will be any improvements with the XHP70.3.
Haukkeli
Offline
Last seen: 1 day 15 min ago
Joined: 06/24/2021 - 05:27
Posts: 510
Location: Suomi
Tom E wrote:

According to the datasheets when comparing, the .3 does a little better with heat – drops less voltage per degree C, and thermal resistance at the junction is a little lower. Probably not enough to be noticeable. The .3 is available in P4 bin though, getting more lumens for free (no extra amps or heat), but again, low, maybe about 7% bump from P2. The Vf hasn’t changed, so it should work well with existing drivers.


The biggest reason for 70.2 lights not having sustained brightness is the driver design and overall flashlight design. Because the LED is capable of high amps, high output, it’s usually pushed hard in the design.

Simon from Convoy has P4 3A binned xhp70.2. At least that’s what he told me, when I asked.

id30209
id30209's picture
Offline
Last seen: 2 hours 2 min ago
Joined: 05/17/2018 - 12:20
Posts: 2314
Location: Croatia

Where everybody talks about efficiency of .3, i’m more interested in having no ugly yellow corona around hotspot. That’s my sole interest in these emitters. Other specs cannot be worse than it was on previous gen.

WTB Titanium 4sevens 2xAA tube

thornton90
Offline
Last seen: 5 months 3 weeks ago
Joined: 03/28/2021 - 11:32
Posts: 23
id30209 wrote:

Where everybody talks about efficiency of .3, i’m more interested in having no ugly yellow corona around hotspot. That’s my sole interest in these emitters. Other specs cannot be worse than it was on previous gen.

Has anyone got their hands on one yet for a test to see how much better the tint shift is in the beam?

svitlo
Offline
Last seen: 10 months 1 week ago
Joined: 01/31/2019 - 12:01
Posts: 24
Location: Ukraine
Hellie112
Hellie112's picture
Offline
Last seen: 2 weeks 5 days ago
Joined: 05/18/2013 - 08:48
Posts: 115
Location: The Netherlands

Anyone found a source for the xhp70.3? Why can’t we still get these leds in every store? It has been almost 6 months since the announcement.

Tom E
Tom E's picture
Offline
Last seen: 3 months 2 weeks ago
Joined: 08/19/2012 - 08:23
Posts: 15065
Location: LI NY

Sitting in a container ship somewhere? Could be a dozen good reasons especially lately.

Pages