[BLF special edition light] new Sofirn AAA twisty high CRI Yuji 5mm LED (CCT 3200K or 5600K) for 6.50 USD

2853 posts / 0 new
Last post
djozz
djozz's picture
Offline
Last seen: 2 hours 32 min ago
Joined: 09/07/2012 - 17:04
Posts: 15793
Location: Amsterdam

The Fenix E01 design is cheap and works, there is no need to do better than that, provided that it is copied well enough.

teacher
teacher's picture
Offline
Last seen: 2 months 1 week ago
Joined: 02/23/2016 - 19:04
Posts: 9596
Location: NE & SW Alabama

OK… hopefully this has been much ado about nothing then.

Thanks for sharing your illustrated ‘fix’ however…. just in case. Thumbs Up

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

 .................................. "Slow is Smooth, Smooth is Fast" ...................................

       Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$  

         Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart  

      Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help???            TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal 

 

                                             

slowtechstef
slowtechstef's picture
Offline
Last seen: 10 hours 57 min ago
Joined: 02/17/2018 - 12:39
Posts: 206
Location: the Netherlands
djozz wrote:
The Fenix E01 design is cheap and works, there is no need to do better than that, provided that it is copied well enough.

Thanks for clearing that up, sharing your findings on this potential issue with Sofirn, and providing us with a fix for a potential future problem of the current production C01 Thumbs Up

joechina
Offline
Last seen: 1 week 6 days ago
Joined: 03/05/2016 - 08:23
Posts: 1405
Location: Germany

I won’t add stuff on the contacts to my C01.
But would those gilded copper bits an option?
https://www.aliexpress.com/item/Tangda-rectangles-Square-Electronic-test...SMD-terminal-Connectors/32836151077.html

TheOnlyDocc
TheOnlyDocc's picture
Offline
Last seen: 1 month 3 days ago
Joined: 06/26/2015 - 05:17
Posts: 949
Location: Mönchengladbach /Germany

Any news on the Blue and Red C01? It is getting late for Christmas presents.

New WildTrail (former LuckySun) D80v2 Sale has Started http://budgetlightforum.com/node/66255

Micmania
Micmania's picture
Offline
Last seen: 13 hours 28 min ago
Joined: 12/11/2017 - 15:28
Posts: 69
Location: Germany
TheOnlyDocc wrote:
Any news on the Blue and Red C01? It is getting late for Christmas presents.

was actually sinnin’ the same …

last thing I heard was about “10 days”, but this was more than 10 days ago … Although today the black C01 went off from “New arrivals” …

Streamer
Streamer's picture
Offline
Last seen: 7 hours 7 min ago
Joined: 12/01/2011 - 21:06
Posts: 3765
Location: TX

djozz wrote:
This issue needs a good pic I see now.

Left my Fenix E01. You can see that the copper is extending to the edge and that the contact area is ok, not great IMO but this light has proven over the years that it is adequate.

Middle is one of the C01 prototypes. I see now that the copper here also does not extend to the side, but that the contact area is only good because the circuitry is not overly well centered on the board, so that one side makes for a very good contact area, the other side much less. Btw, at the time of the prototype I did warn Barry to pay attention to good contact points.

Right is the production C01. The circuitry is even a bit further from the edge of the board compared to the prototype, not much of a contact area leftover.

But it works and maybe for a very long time, again mind that there is no hard data at all at this moment that this is a failure point at all, we are speculating based on what we see. It will not help for this production run but I will confront Barry with this picture.


(in the picture not all boards seem the same size, this is distortion of my phone camera, in reality the boards are all the same size)


Thanks for the pic djozz. It is very clear now. Thumbs Up
hank
hank's picture
Offline
Last seen: 1 day 3 hours ago
Joined: 09/04/2011 - 21:52
Posts: 8140
Location: Berkeley, California

Maybe press-fitting a thin copper washer down into the battery tube to sit on and enlarge the front-facing “shelf” against which the head has to make contact.

djozz
djozz's picture
Offline
Last seen: 2 hours 32 min ago
Joined: 09/07/2012 - 17:04
Posts: 15793
Location: Amsterdam

hank wrote:
Maybe press-fitting a thin copper washer down into the battery tube to sit on and enlarge the front-facing “shelf” against which the head has to make contact.

By far the cheapest way to improve this (this is a cheap light) is to make a different driver board with copper extending to the very edge, maybe use one grade thicker copper for infinite lasting contact points.
jon_slider
jon_slider's picture
Offline
Last seen: 5 hours 23 min ago
Joined: 09/08/2015 - 12:20
Posts: 2309
Location: Crowdifornia

Let me be the first to say, if the light works, it aint broke
Thanks for the photos djozz
E01 on left, production C01 on right

I honestly do not see a problem… Contact is Contact

otoh, IF a C01 Stops working.. then yes, that would be a problem

and please do NOT copy the signal wires on a U60.. thats a whole nuther can of worms

djozz wrote:
By far the cheapest way to improve this (this is a cheap light) is to make a different driver board with copper extending to the very edge, maybe use one grade thicker copper for infinite lasting contact points.

I respect, appreciate and admire your attention to details and suggestions for any Necessary improvements.

hank
hank's picture
Offline
Last seen: 1 day 3 hours ago
Joined: 09/04/2011 - 21:52
Posts: 8140
Location: Berkeley, California

Do you think they make their own driver boards in their factory?
Or are they subcontracted to whoever’s the low bidder for a “good enough” product?
In the latter case I’d worry that the red and blue lights made later come through with more corner-cutting done.
https://www.google.com/search?client=firefox-b-1-ab&q=chinese+good+enough

Question comes down to who to try to educate.

Quote:
If you are German or Northern European in general, you are likely used to things being done according to specifications and high standards. You probably wouldn’t expect less than 100%. As an American, you are may be used to a little more wiggle room. Not everything is quite as perfect, for example with regard to workmanship, but still very good, like 90-95%.

Not so in China. In China, the typical approach is summed up in one word: “chabuduo”, meaning “nearly” or “almost”. For most Chinese it also means “good enough”….

you have to pay attention to the output. To reduce the number of revision iterations, you should give very specific style instructions, ideally with a template, and review everything carefully….


https://www.beijingexpatguide.com/chabuduo-mindset/
slowtechstef
slowtechstef's picture
Offline
Last seen: 10 hours 57 min ago
Joined: 02/17/2018 - 12:39
Posts: 206
Location: the Netherlands

jon_slider wrote:
djozz wrote:
By far the cheapest way to improve this (this is a cheap light) is to make a different driver board with copper extending to the very edge, maybe use one grade thicker copper for infinite lasting contact points.

I respect, appreciate and admire your attention to details and suggestions for any Necessary improvements.

To me, the collective knowledge, wisdom and expertise on BLF is amazing. Speaking for myself, I am learning a lot here on different levels from different flashlight ‘black belts’ such as djozz. Thanks to all of you, for sharing pictures, jokes, firmware source code, PCB designs, tinkering experiences, products reviews and everything else. Hopefully, flashlight manufacturers will pay attention as well. Most of us even want them to “steal” our ideas, so we can actually buy the types of flashlights we wish would be available to us.

jon_slider: thanks for your close up detail work of djozz’s picture, the issue could not be visually illustrated in a better way.

hank wrote:
Do you think they [Sofirn] make their own driver boards in their factory?
Or are they subcontracted to whoever’s the low bidder for a “good enough” product?
In the latter case I’d worry that the red and blue lights made later come through with more corner-cutting done.
https://www.google.com/search?client=firefox-b-1-ab&q=chinese+good+enough

Question comes down to who to try to educate.

Quote:
If you are German or Northern European in general, you are likely used to things being done according to specifications and high standards. You probably wouldn’t expect less than 100%. As an American, you are may be used to a little more wiggle room. Not everything is quite as perfect, for example with regard to workmanship, but still very good, like 90-95%.

Not so in China. In China, the typical approach is summed up in one word: “chabuduo”, meaning “nearly” or “almost”. For most Chinese it also means “good enough”….

you have to pay attention to the output. To reduce the number of revision iterations, you should give very specific style instructions, ideally with a template, and review everything carefully….


https://www.beijingexpatguide.com/chabuduo-mindset/

Hank: thanks for sharing the concept of chabuduo, which seems to be pervasive within Chinese manufacture culture.

When I thought up the idea of a high-CRI version of a Fenix E01, what I hoped for was a “Toyota-style” flashlight: reliable, affordable, and build with pride. Interestingly in Japan craftsmanship, especially within modernized manufacturing, is culturally valued as something important. What I hoped for was a flashlight built with care. The Japanese have a wonderful concept that captures this idea: monozukuri (See Wikipedia or this article). Call me naive, but I truly hope we (as flashlight collective) can instill some monozukuri in Sofirn.

Most people at BLF are critical fans of flashlight technologies, they truly care about portable light, and in this technological domain they are maximizers: they actively explore the boundaries of what is technically possible, and then true to the hacker spirit try to transgress these boundaries. Engineering literally as a form of art.

Most manufacturers, and most consumers as well, are satisfiers: if it works, it works. For most consumers what is most imporant is purchase price, and for most manufacturers what counts is maximizing profit.

To come full circle to the contact areas of the C01: the current design seems to be satisficing. To quote Wikipedia:

wikipedia wrote:
Satisficing is a decision-making strategy or cognitive heuristic that entails searching through the available alternatives until an acceptability threshold is met. The term satisficing, a portmanteau of satisfy and suffice, was introduced by Herbert A. Simon in 1956, although the concept was first posited in his 1947 book Administrative Behavior. Simon used satisficing to explain the behavior of decision makers under circumstances in which an optimal solution cannot be determined. He maintained that many natural problems are characterized by computational intractability or a lack of information, both of which preclude the use of mathematical optimization procedures. He observed in his Nobel Prize in Economics speech that “decision makers can satisfice either by finding optimum solutions for a simplified world, or by finding satisfactory solutions for a more realistic world. Neither approach, in general, dominates the other, and both have continued to co-exist in the world of management science”.

Back to stuff that most people here probably think matters more:

Micmania wrote:
TheOnlyDocc wrote:
Any news on the Blue and Red C01? It is getting late for Christmas presents.

was actually sinnin’ the same …

last thing I heard was about “10 days”, but this was more than 10 days ago … Although today the black C01 went off from “New arrivals” …

Perhaps someone can create an RSS script for watching the Sofirn AliExpress store so we can automatically get a notification when the red or blue C01 comes available? Someone should probably ask this question in the IRC channel ##flashlight on Freenode. The regulars over there seem to have some advanced flashlight news notification tools Wink

lumenzilla
lumenzilla's picture
Online
Last seen: 2 min 30 sec ago
Joined: 06/09/2015 - 04:18
Posts: 703
Location: DIY, Indonesia

Got mine shipped. Can’t wait to see them coming.

hank
hank's picture
Offline
Last seen: 1 day 3 hours ago
Joined: 09/04/2011 - 21:52
Posts: 8140
Location: Berkeley, California
Quote:
how to build uber-reliable (flashlight) driver boards.

Start with quality components, not the cheap stuff.

https://www.google.com/search?client=firefox-b-1-ab&q=electronic+semicon...

Oh, wait ….

JasonJ
Offline
Last seen: 6 days 21 hours ago
Joined: 05/12/2014 - 12:00
Posts: 359
Location: Bay City, MI

… checking the AliExpress site often, daily in fact, waiting for the other colored body variants.

Lagittaja
Lagittaja's picture
Offline
Last seen: 30 min 6 sec ago
Joined: 11/28/2017 - 19:24
Posts: 89
Location: Finland
Lagittaja wrote:
Lagittaja wrote:
Lagittaja wrote:
Thanks for the notification Tally-ho, placed an order for my two pieces. Waiting for the price adjustment.

About 5 hours later price changed from 17.76$ to 13.00$. Paid.

And my two pieces have arrived here in Finland.

21.11.2018 22.00 order made
22.11.2018 03.00 price adjusted and paid shortly after
22.11.2018 12.00 “shipped”
24.11.2018 22.00 actually shipped
06.12.2018 18.00 arrived in Finland

I’d expect the parcel to be available for pickup at my local post office next Monday or Tuesday unless the customs decides to take a look at it.

And indeed the parcel was available for pickup today.

Unfortunately I only received 1× 5600K when I ordered 1x both. Only one inside and even the CN22 form said “quantity 1”.
Oh well, shit happens. Not a big deal! Sent a message to them. They’ll probably get back to me later “today”, it’s 2AM in Shenzhen right now.

Like I said before, at this moment I could order more C01’s but since I did not get both CCT I don’t know which one I like more. Argh..

djozz
djozz's picture
Offline
Last seen: 2 hours 32 min ago
Joined: 09/07/2012 - 17:04
Posts: 15793
Location: Amsterdam

Note to Sofirn: the 11-11 sale is clearly the wrong moment to launch a new product Facepalm

HONDARIDER
HONDARIDER's picture
Offline
Last seen: 3 days 16 hours ago
Joined: 04/22/2018 - 11:45
Posts: 902
Location: Hot Springs, Arkansas

I ordered 1 of each this morning to see what all the hype is about.

djozz
djozz's picture
Offline
Last seen: 2 hours 32 min ago
Joined: 09/07/2012 - 17:04
Posts: 15793
Location: Amsterdam

HONDARIDER wrote:
I ordered 1 of each this morning to see what all the hype is about.

Uh oh, now you will find out that it is just a nice little light with nice tint and pretty weak output. Facepalm

Edit: you did write post #2000 in this thread, that is good start Smile

hank
hank's picture
Offline
Last seen: 1 day 3 hours ago
Joined: 09/04/2011 - 21:52
Posts: 8140
Location: Berkeley, California

It fills in the black shadows between streetlights quite adequately, and I love the wide fill, full sidewalk.

But my second package is shown by Ali tracking as signed for and handed over, but it never arrived in my mailbox.

jon_slider
jon_slider's picture
Offline
Last seen: 5 hours 23 min ago
Joined: 09/08/2015 - 12:20
Posts: 2309
Location: Crowdifornia

Received my 2 Sofirn today

First impressions
Sofirn tailstands more easily, Fenix throws more.

weight w no battery and no clip
Sofirn 14.2 grams
Fenix 13.3 grams

The lumens measurements were all done using the same Lithium Primary, in the Fenix body, I just changed the heads for the lumens tests.

in this next photo you can get some idea that the Fenix has more throw

Lumens
Sofirn C01 3200k 6.1 Lumens
Sofirn C01 5600k 9 lumens
Fenix E01 6000k 10.2 lumens

The beam on the Fenix is smaller, brighter, throws more and has a more concentrated hotspot.
Fenix has blue tinted hotspot
5600k Sofirn looks white and very floody, almost no hotspot
3200, Sofirn looks slightly orange and very floody, almost no hotspot

it is 10 am by a window on an overcast day. I cannot see the beam of the sofirns on the ceiling, only the blue hotspot of the fenix is visible.

the 5600k sofirn has the most “natural” tint

another view of the beam shapes and hotspots

Test of looking under the bed, during the day, when my brain is White Balanced to Daylight.
The 5600k Yuji is my favorite. The Fenix blue tint and hotspot bothers me. The warm Yuji is too dim and warm, at this time of day.

More tests to follow tonight when I wake for the bathroom.. I suspect the warm Yuji will prevail in that application, but will update after real world testing.

teacher
teacher's picture
Offline
Last seen: 2 months 1 week ago
Joined: 02/23/2016 - 19:04
Posts: 9596
Location: NE & SW Alabama

hank wrote:

(snip)
But my second package is shown by Ali tracking as signed for and handed over, but it never arrived in my mailbox.
Ooops… somebody got some ‘splainin’ to do!

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

 .................................. "Slow is Smooth, Smooth is Fast" ...................................

       Texas Lumens Flashlights / M4D M4X Deals : sign up - save $$$$  

         Rudeness Level _ mΩ _ {width:70%} _ LightWiki _ LED Tint Chart  

      Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help???            TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal 

 

                                             

jon_slider
jon_slider's picture
Offline
Last seen: 5 hours 23 min ago
Joined: 09/08/2015 - 12:20
Posts: 2309
Location: Crowdifornia

Kona G wrote:
my light paint peeled off … metal in rusted condition! Clip is in garbage can, light will soon to follow!

Bull
Pics or it didn’t happen
iamlucky13
Offline
Last seen: 2 hours 29 min ago
Joined: 06/22/2018 - 09:18
Posts: 583
Location: USA
jon_slider wrote:
Received my 2 Sofirn today

Thanks for the report. Good comparison pictures.

If you’re like me, you’ll “warm” up to the 3200K after dark, but I agree, it’s less than ideal when your primary reference is daylight.

slowtechstef
slowtechstef's picture
Offline
Last seen: 10 hours 57 min ago
Joined: 02/17/2018 - 12:39
Posts: 206
Location: the Netherlands
hank wrote:
Quote:
how to build uber-reliable (flashlight) driver boards.

Start with quality components, not the cheap stuff.

https://www.google.com/search?client=firefox-b-1-ab&q=electronic+semicon...

Oh, wait ….

Hank thanks to the pointers about reliability.
Got me thinking about redundancy as well.
So in the true spirit of BLF I present the C01-RAIF-1

A pity Yuji doesn’t selll 4400K 5mm LEDs by the way Wink

slowtechstef
slowtechstef's picture
Offline
Last seen: 10 hours 57 min ago
Joined: 02/17/2018 - 12:39
Posts: 206
Location: the Netherlands
jon_slider wrote:
Kona G wrote:
my light paint peeled off … metal in rusted condition! Clip is in garbage can, light will soon to follow!
Bull Pics or it didn’t happen

I understood it was only the metal clip that was rusted which caused the black paint of the clip to peel off.
The body of the C01 is made of aluminium, which oxidizes, and is not able to “rust”.

A photograph would be nice in this case so anyone can assess the exact nature of the problem.

That said: the anodization of the C01 body and the paint of the clip will wear down over time, especially when worn on a keychain.
The anodization type is nowhere explicitly specified by Sofirn, so it is probably the less robust Type II.

polarweis
polarweis's picture
Offline
Last seen: 3 days 9 hours ago
Joined: 05/31/2017 - 17:05
Posts: 378

so which AAA do we like? and is a lithium AAA an option? never heard of those.

"It wouldn’t be so bright if there wasn’t a shadow every once in a while." - Jason Mraz

iamlucky13
Offline
Last seen: 2 hours 29 min ago
Joined: 06/22/2018 - 09:18
Posts: 583
Location: USA
polarweis wrote:
so which AAA do we like? and is a lithium AAA an option? never heard of those.

Energizer Ultimate Lithium is a primary (non-rechargeable) cell known for excellent shelf life and tolerance to high and very low temperatures, good discharge characteristics, and little to no leak risk. The downside is they’re a little bit pricey, but have been getting better lately. It’s an excellent option if you’re ok with the price.

Alkalines will work well in this light from a runtime perspective, especially the reduced output that occurs after the first 8-10 hours of operation. However, there is the ever-present leak risk that has to be considered for alkalines. I’ve had good luck cleaning up alkaline leakage with vinegar, so I might still use alkalines in mine. I haven’t decided.

Rechargeable nickel metal hydride (NiMH) batteries have very good discharge characteristics, a low potential total cost of ownership due to being rechargeable, and little to no leak risk. However, their lifespan is shortened if over-discharged, and this light is capable of over-discharging them. Recharging when the light gets noticeably dim will probably be reasonable protection against that.

HONDARIDER
HONDARIDER's picture
Offline
Last seen: 3 days 16 hours ago
Joined: 04/22/2018 - 11:45
Posts: 902
Location: Hot Springs, Arkansas

djozz wrote:
HONDARIDER wrote:
I ordered 1 of each this morning to see what all the hype is about.

Uh oh, now you will find out that it is just a nice little light with nice tint and pretty weak output. Facepalm

Edit: you did write post #2000 in this thread, that is good start Smile

I have not been a member for a long period of time but this thread has showed up at some point every week. The output is what had deterred me from purchasing this light. I would think a 30 lumen high would make this light more ideal. Just money. Sure I have spent it on worse things in the past.

polarweis
polarweis's picture
Offline
Last seen: 3 days 9 hours ago
Joined: 05/31/2017 - 17:05
Posts: 378

Nimh sounds good thanks for the reply. I check my batteries pretty often. Just put them in a charger for a sec to see how they’re doing.

"It wouldn’t be so bright if there wasn’t a shadow every once in a while." - Jason Mraz

Pages