Q8, PMS SEND TO THOSE WITH ISSUES BLF soda can light

17366 posts / 0 new
Last post
I_like_lamb
I_like_lamb's picture
Offline
Last seen: 4 hours 53 min ago
Joined: 08/21/2016 - 03:54
Posts: 106
Location: Sydney, 'Straya
The Miller wrote:
I_like_lamb wrote:
Wait, so is the indicator light ever supposed to be orange/yellow? Are there supposed to be more colours than just green?
Djozz modded it into another color Smile

Thanks for calming my frazzled nerves d:

Tom Tom
Offline
Last seen: 4 months 3 weeks ago
Joined: 09/10/2017 - 08:30
Posts: 1163

Hoping at least one of mine will be in the next 500 (first was ordered Sept 12, strategic choice not to be in first batch)

After that perhaps there will be a pause before the next 700+ go out. If so, not the least bit bothered. Good things come to those who wait.

patmurris
patmurris's picture
Offline
Last seen: 2 hours 12 min ago
Joined: 12/22/2014 - 15:54
Posts: 1327
Location: Nice, France

Tom Tom wrote:
Hoping at least one of mine will be in the next 500 (first was ordered Sept 12, strategic choice not to be in first batch)

On Sept 12 there was already more then 1300 preorders… Yours is likely to be out of the second 500 batch. Sad
whitecitadel
Offline
Last seen: 5 days 20 hours ago
Joined: 12/30/2014 - 05:58
Posts: 77
Location: London, UK

Not too worried about the upcoming holidays, rather have it screwed together later than mangled sooner Wink

Keep up the good work Q8 team Thumbs Up

teacher
teacher's picture
Offline
Last seen: 1 week 4 days ago
Joined: 02/23/2016 - 19:04
Posts: 9596
Location: NE & SW Alabama

patmurris wrote:
Tom Tom wrote:
Hoping at least one of mine will be in the next 500 (first was ordered Sept 12, strategic choice not to be in first batch)
On Sept 12 there was already more then 1300 preorders… Yours is likely to be out of the second 500 batch. Sad
W o w….. 1300 on the 12th!! Good deal for the GB.
Looks lIke my last ones will be a while then.
Oh well, as has been said; no rush. Wink

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 

 

                                             

Tom Tom
Offline
Last seen: 4 months 3 weeks ago
Joined: 09/10/2017 - 08:30
Posts: 1163
patmurris wrote:
Tom Tom wrote:
Hoping at least one of mine will be in the next 500 (first was ordered Sept 12, strategic choice not to be in first batch)
On Sept 12 there was already more then 1300 preorders… Yours is likely to be out of the second 500 batch. Sad

Not when I ordered (I’m at least 5 hours ahead of you Yanks, we run on GMT+1 at the moment), and get up very early. I think it was sitting on about 800 when I hit the go button, that was my strategy. But maybe I mis-remember. In any case, not bothered.

Edit: my order date of Sept 12 was China time which is 7 hours ahead of UK time (checked PayPal receipt) So I ordered on the 11th, depending how you look at things. (the only true time is at the Greenwich Meridian, despite what everyone else would like to think, or try to re-name it UTC etc.) Thought my brain wasn’t ready to give up just yet.

zeroflow
Offline
Last seen: 2 weeks 4 days ago
Joined: 05/23/2017 - 02:15
Posts: 189
Location: Austria

To have a little bit better statisticts: My Q8 arrived today with the expedited shipping service.

Leds in the Button: 100% ok and even
Screws at the PCB: Not stripped
Screws at the Tailcap: One slightly stripped, all 3 others A-OK.
Emitters centered, flawless reflector
No kinks or damage to the Frame

Only the brass ring at the plus pole was a little bit dirty.

Bonham
Bonham's picture
Offline
Last seen: 14 hours 9 min ago
Joined: 01/11/2012 - 16:00
Posts: 310
Location: Bulgaria

I got mine 2 days ago.
So far I have not found any problems. Smile

I would be grateful if I could buy one more.

Tom Tom
Offline
Last seen: 4 months 3 weeks ago
Joined: 09/10/2017 - 08:30
Posts: 1163

Bonham wrote:
I got mine 2 days ago.
So far I have not found any problems. Smile

I would be grateful if I could buy one more.

Maybe MadMax or Elfeland is the quickest way, for now.

Flintrock
Offline
Last seen: 1 year 7 months ago
Joined: 09/10/2016 - 20:29
Posts: 1544

So I noticed a post by TA Tom E that someone had 135uA through the switch LED and it didn't work, then lowered the resistance and had 155uA and then it did work.

 

I don't think that's a Vf issue and I never felt Vf variability would cause this, although it depends how close the diode Vf is to the supply voltage.  It could cause mismatch in the LED's when driven through a single resistor but it shouldn't cause them to quit entirely, and 155uA to 135uA probably shouldn't either.  That looks like some kind of leakage current problem, like 135uA isn't real functional diode current, thus it not making light.  Is it normal for an LED to have a minimum turn-on current?

 

 

RapidLux
RapidLux's picture
Offline
Last seen: 1 hour 6 min ago
Joined: 03/24/2017 - 13:21
Posts: 218

BLF Q8 Group buy sale statistics, Using UTC+2 time.

Date -> Preorders
7. Sept 02.00 GB Started
7. Sept 20:40 -> 500
7. Sept 23:50 -> 742
8. Sept 04:35 -> 931
8. Sept 07:47 -> 993
8. Sept 10:24 -> 1024 — Yes exactly at that time, I double checked!
8. Sept 21:42 -> 1106
9. Sept 03:58 -> 1143
9. Sept 22:20 -> 1202
10. Sept 0428 -> 1212
11. Sept 22:32 -> 1320
12. Sept 22:11 -> 1359
13. Sept 20:45 -> 1389
14. Sept 2042 -> 1422
15. Sept 20:20 -> 1458
16. Sept 10:00 -> 1493
16. Sept 19:40 -> 1523
25. Sept 05:42 -> 1671
26. Sept 12:32 -> 1706
26. Sept 19:59 -> 1726
27. Sept 10:57 -> 1764
27. Sept 16:40 -> 1775

JasonWW
JasonWW's picture
Offline
Last seen: 3 hours 31 min ago
Joined: 10/22/2016 - 11:41
Posts: 11129
Location: Houston Texas

Flintrock wrote:

So I noticed a post by TA Tom E that someone had 135uA through the switch LED and it didn’t work, then lowered the resistance and had 155uA and then it did work.

I don’t think that’s a Vf issue and I never felt Vf variability would cause this, although it depends how close the diode Vf is to the supply voltage.  It could cause mismatch in the LED’s when driven through a single resistor but it shouldn’t cause them to quit entirely, and 155uA to 135uA probably shouldn’t either.  That looks like some kind of leakage current problem, like 135uA isn’t real functional diode current, thus it not making light.  Is it normal for an LED to have a minimum turn-on current?



The total parasitic drain for the Q8 is 135uA. The LEDs drain 113uA and the driver drains 22uA.

Amplificus swapped the 15K switch resistor to a 10K resistor and that made his switch lights start working again. Then he measured his parasitic drain again and got a total of 155uA.

Agro
Agro's picture
Online
Last seen: 5 sec ago
Joined: 05/14/2017 - 11:16
Posts: 4398
Location: Ślōnsk

I was in the second 500, but my estimated shipping date is the 10th of October. I think I’ve seen someone with a better date…

Tom Tom
Offline
Last seen: 4 months 3 weeks ago
Joined: 09/10/2017 - 08:30
Posts: 1163
Flintrock wrote:

So I noticed a post by TA Tom E that someone had 135uA through the switch LED and it didn’t work, then lowered the resistance and had 155uA and then it did work.


 


I don’t think that’s a Vf issue and I never felt Vf variability would cause this, although it depends how close the diode Vf is to the supply voltage.  It could cause mismatch in the LED’s when driven through a single resistor but it shouldn’t cause them to quit entirely, and 155uA to 135uA probably shouldn’t either.  That looks like some kind of leakage current problem, like 135uA isn’t real functional diode current, thus it not making light.  Is it normal for an LED to have a minimum turn-on current?


 


 

Its much more complicated, the LEDs are being operated on the knee of a very rapidly reducing curve, not a nice flat region (datasheet Vf). A few microamps difference could make all the difference between lighting up nicely or not. Most of the microamps will not be going into making light, at these low levels, the majority will just be leaking through the compound semiconductors in the LED, to no effect. It is far from a linear relationship between current and light output at these infinitesimal levels, and this is on the ragged edge.

Edit: and the actual “Vf” will be varying hugely with tiny changes of current at these low levels. Amazing it can work so well with just a series resistor, it is absolutely not just a simplistic Vf=x, current = y, thus therefore voltage drop across resistor = Vbatt (variable) -(Vf at current =y), apply Ohms law, resistor defined, whack it in. Oh no.

Tom Tom
Offline
Last seen: 4 months 3 weeks ago
Joined: 09/10/2017 - 08:30
Posts: 1163

RapidLux wrote:
BLF Q8 Group buy sale statistics, Using UTC+2 time.

Date -> Preorders
7. Sept 03.00 GB Started
7. Sept 20:40 -> 500
7. Sept 23:50 -> 742
8. Sept 04:35 -> 931
8. Sept 10:24 -> 1024 — Yes exactly at that time, I double checked!
8. Sept 21:42 -> 1106
9. Sept 03:58 -> 1143
9. Sept 22:20 -> 1202
10. Sept 0428 -> 1212
11. Sept 22:32 -> 1320
12. Sept 22:11 -> 1359
13. Sept 20:45 -> 1389
14. Sept 2042 -> 1422
15. Sept 20:20 -> 1458
16. Sept 19:40 -> 1523
25. Sept 05:42 -> 1671
26. Sept 12:32 -> 1706
26. Sept 19:59 -> 1726
27. Sept 10:57 -> 1764
27. Sept 16:40 -> 1775

What time coordinates are those ? China is at least 12 hours ahead of US east coast (I think, may have it an hour or two wrong).

Maybe correct it to GMT (or UTC if you must), or back-calculate to Banggood China time (not sure what zone they are in, I think they stick to standard)

Nevertheless the gist suggests to me I was a bit late with my first order.

PS: Wim sent me the codes 2 hours before they went live “Codes start working on Sep, 7th 10:00 am (UTC+8).”

The Miller
The Miller's picture
Offline
Last seen: 1 year 4 months ago
Joined: 12/14/2015 - 12:08
Posts: 9630
Location: Charente France

RapidLux nice
Lol at 1024

Lazy-R-us
Offline
Last seen: 3 months 3 weeks ago
Joined: 09/13/2015 - 00:30
Posts: 674
Location: Carolinas, USA

Agro wrote:
I was in the second 500, but my estimated shipping date is the 10th of October. I think I’ve seen someone with a better date…

Estimated ship dates are like the warnings from Sony and LG that say their 18650 batteries should not be used except in battery packs; best totally ignored.

Lazy-R-us

Tom Tom
Offline
Last seen: 4 months 3 weeks ago
Joined: 09/10/2017 - 08:30
Posts: 1163
The Miller wrote:
RapidLux nice Lol at 1024

Pity he didn’t catch 768 Smile

Terry White
Terry White's picture
Offline
Last seen: 1 year 2 months ago
Joined: 09/22/2016 - 04:14
Posts: 1018
Location: South Carolina

The Miller wrote:
Terry White wrote:

Did I read the headline correctly... Productions is up and running again?

yeah sorry, I figured the topic title change would answer your PM :D

 

I just had to double check... That was much faster than I had thought... 

Terry White

Skype terrywhite1@live.com

fixed it
Offline
Last seen: 1 month 1 week ago
Joined: 12/08/2015 - 14:27
Posts: 393
Location: Canada

Tom Tom wrote:
Its much more complicated, the LEDs are being operated on the knee of a very rapidly reducing curve, not a nice flat region (datasheet Vf). A few microamps difference could make all the difference between lighting up nicely or not. Most of the microamps will not be going into making light, at these low levels, the majority will just be leaking through the compound semiconductors in the LED, to no effect. It is far from a linear relationship between current and light output at these infinitesimal levels, and this is on the ragged edge.
Are these small SMD LEDs really that different from the larger emitters? I’ve driven those down to ridiculously low levels (as in: I had to put the light to my eye in a dark room to see if it was on) and have never seen any kind of knee in output. There’s a lot of speculation going around but I’ve yet to see any hard facts on why the LEDs act like they do (eg. someone putting a scope on the LED to measure something).

Mine has just begun to act up as well. I’m working on a video. Here goes: https://youtu.be/uFwYC6rlSa4

The light is otherwise in line with what others have seen: some good screws, some stripped (but likely removable) screws, minor scratch on the tailcap, works great. I just wish the tube was an inch longer.

I put the cells in the charger for a few minutes and the indicator is working again. Seems like the Vf theory might have some merit after all.

ISO
Offline
Last seen: 5 days 21 hours ago
Joined: 11/02/2016 - 17:11
Posts: 165
Location: Sweden

Well I ordered some lights in the first batch to give away. And it will still take sometime before I get them. I am used to 6-8 week shipping so no worry yet.

ISO
Offline
Last seen: 5 days 21 hours ago
Joined: 11/02/2016 - 17:11
Posts: 165
Location: Sweden

Testing imgur

How to show picture

How do i make the picture show up without link ?

Tom Tom
Offline
Last seen: 4 months 3 weeks ago
Joined: 09/10/2017 - 08:30
Posts: 1163

Take a look at this simplistic view:

http://www.electronics-tutorials.ws/diode/diode_8.html

We are operating right down at the ~ 2V region where curves converge, tend to be more horizontal and all bets are off. The dotted line at 20 mA is where they start coming on-song, predictably.

Edit Ours are being run at less than 1/100th of that level.

If you had real data on these specific diodes, from a specific batch, and plotted on a log scale, I think (surmise) that they would be operating in a very non-linear (and undocumented) region at these current densities, depending on the area of the junction, indirectly related to size of the die. They don’t behave much differently from a basic PN diode, just the “switching region” between conduction and not, is raised in voltage (e.g about 0.6v for plain silicon) Leds have a different band-gap, depending on frequency (colour) of light emitted.

And they are made of compound semiconductors, not silicon (Gallium, Indium, with Arsenic doping to name a few), applied epitaxially on top of plain silicon, or silicon carbide (Cree) which may or may not be ideally constructed, depending on skills of the manufacturer. Making blue LEDs was thought impossible, until a very clever Japanese fellow showed how to do it, and then UV. Red, amber, green, dead easy by comparison. Now we have all sorts of colours. White ones don’t exist, they are typically mainly a UV emitter with precisely tuned phosphor mix on top that converts UV to the high CRI white light we love. Making the phosphors is a closely guarded secret, making them last and be stable for thousands of hours even more so.

It’s dead clever.

Anyway, bottom line is that it’s tricky to run even tiny LEDs at very low currents consistently well. Thorfire got caught out when they changed between prototypes (working well) and what might have seemed like an identical alternative, according to datasheet, but now we know differently.

hank
hank's picture
Offline
Last seen: 8 hours 46 min ago
Joined: 09/04/2011 - 21:52
Posts: 8118
Location: Berkeley, California

>Thorfire got caught out

“Trust, but verify”

Joey Adams
Offline
Last seen: 2 months 3 weeks ago
Joined: 02/12/2017 - 21:29
Posts: 376
Location: Jamestown, KY

Tom Tom][quote=RapidLux wrote:
BLF Q8 Group buy sale statistics, Using UTC+2

PS: Wim sent me the codes 2 hours before they went live “Codes start working on Sep, 7th 10:00 am (UTC+8).”

Man that would have been nice to have!

teacher
teacher's picture
Offline
Last seen: 1 week 4 days ago
Joined: 02/23/2016 - 19:04
Posts: 9596
Location: NE & SW Alabama

Joey Adams][quote=Tom Tom wrote:
RapidLux wrote:
BLF Q8 Group buy sale statistics, Using UTC+2

PS: Wim sent me the codes 2 hours before they went live “Codes start working on Sep, 7th 10:00 am (UTC+8).”

Man that would have been nice to have!
Joey!!! How is it going? Good to see you man. Smile
You better make sure those batteries are charged buddy……. looks like your Q8(s) will be taking flight before too long…. headed straight at you.
Make sure you have your Eclipse Glasses handy too… your gonna need them. Wink
(hope you got a pair & saved them) Big Smile

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 

 

                                             

Tally-ho
Tally-ho's picture
Offline
Last seen: 20 min 12 sec ago
Joined: 07/23/2011 - 04:15
Posts: 1206
Location: France

ISO wrote:
Testing imgur

How to show picture

How do i make the picture show up without link ?

Big Smile

Right click on your image…then “copy the link of the image”

teacher
teacher's picture
Offline
Last seen: 1 week 4 days ago
Joined: 02/23/2016 - 19:04
Posts: 9596
Location: NE & SW Alabama

Tally-ho wrote:


Looks like the guy in the picture has his eye on the BLF Q8 too. Wink

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 

 

                                             

ElginAgain
Offline
Last seen: 1 month 2 weeks ago
Joined: 09/30/2014 - 09:38
Posts: 21
Location: Everett, WA

Just ordered my sixth Q8. The original group buy discount code I was PM’d still worked.

Joey Adams
Offline
Last seen: 2 months 3 weeks ago
Joined: 02/12/2017 - 21:29
Posts: 376
Location: Jamestown, KY
teacher wrote:
Tally-ho wrote:
Looks like the guy in the picture has his eye on the BLF Q8 too. Wink

Lol, it also appears that his wife isn’t nearly as big of a flashlight fan as he is!

Pages