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

Hmmmm…. interesting observation. :wink:

Based on data posted by RapidLux :

Notes:
Values extrapolated from 17 to 24 included (16 preorders/day).
Latest count per day was used to produce the chart.

Disclaimer: this chart is probably not suited to determine whether an order placed at a given time and date falls into one Q8 production batch or not. Only one value per day is represented, not accounting for hourly variation inside a day. Translating dates to another time zone is also a source of error. It’s mostly showing the rate at which preorders where placed during the coupon validity preriod.

Thank you patmurris, mine was ordered about 13:00 (utc+10) on the 8th, so its a coin toss if I am in the next batch or not :sunglasses:

Cheers David

we have 500 lights shipped, only 1500 of 2. batch are preorders
so your graph shows total orders

That’s right.
Preorder count as displayed on BG Q8 page i think.

You take your image link, then along the top of the comment box you will see an orangish box next to a green film strip. Click the box and a window will pop up. Paste your link into the top line then click ok. I also usually set the size to 95% so it doesnt show up huge.

Keep in mind that sometimes imgur will give you an image link that is missing the .jpg on the end. So if you see that, just add the .jpg to your link. Or .png if it is that type of image.

Sometimes imgur just gives you a bad link. So I right click on the image and open the image by itself on a new page. Then I can copy that url.

It’s currently not possible. The menu options allow turning off the switch light all the time, but not keeping it on all the time.

You could physically move the switch led wire off the mcu leg and onto a constant positive source. My 2 non Q8 narsil lights are like this. I like them on all the time. It makes it easy to know if they are locked out or not.

So, the refund came 3h earlier this post and my order now is canceled for sure…… :frowning:

Pity but not the end of wolrd, thanks to all and sorry for not join for the team I will order this light in the future or with sale offer.

:+1:

That’s beyond me, but thanks.

What isn’t beyond me is to glue some tritium vials near the switch to mark it. Old school but it works. My old numb hands simply can’t find the switch in the dark. I don’t fault the designers, if they are younger they couldn’t know the issues that age brings on.

Dang! This is one very nice light! I’ve only had it for 1 day and it has already moved the M43 into storage. It’s takes deliberate effort to put the Q8 into “other modes” or to screw up the programmed settings and that was SO easy to do with the M43; at least it was for me. I was frequently reprogramming my settings. Easy to re-program but a PITA.

FWIW, my brothers light has had the switch LEDs lit for 8 hours and all is good. OK, so I have 3 Q8s and not one of them has switch LEDS that are noticeably different in output or are failing. I’m thinking the problem lights are actually few and the owners of those lights have been heard from. Again, these are very nice lights! I suspect the majority are exactly what was desired. If TF has fixed the few issues they have a winner on their hands!

The wife came down the hall as I was checking out bro’s light this afternoon when I had it on turbo waiting for timed step down and she mentioned (full daylight outside allowed to come inside), “Wow, it’s definitely bright in there!”. Ceiling bounce was very noticeable to her in addition to the full daylight.

I eagerly anticipate my brother getting his hands on this light I’m testing. I have another brother who placed his order directly. It’s going to be interesting to read his take on it when he emails me. Neither one has a hotrod light now but are Li-Ion aware.

Just received shipping notifications for my three back ordered units!

Shipped!!

Shipping notice!

just got my Q8, the design look nicer in person. and I think TF did a good job. I dont have problem with unbalanced switch light and the screw heads are in good condition. Let see if the switch led problem occur latter. Thanks to all Q8 Team. :+1:

just checked my orders. My 2 lights are marked shipped too.

I think JasonWW's post answered some of question, possibly, that the current referred to was not just the led current, which I guess wasn't directly measured.

Yes, I get how the Vf curves for led's work below spec. The thing is, you don't care how much voltage is across it, only how much current goes through it. So it depends how it's driven. For example, if you drive a 1V led with a 10V source in series with a 100k resistor, you're going to get about 100uA of current. There's no way Vf is shooting up above nominal 1V, and it can't go below 0V. Either way between 90 to 100% of the 10V drop is across the 100k resistor and 9 to 10V across 100k fixes the current in series through both the resistor and the diode to somewhere between 90 to 100uA, pretty tight, without knowing anything about how sharp that kink is.

Ok, this gets worse when the diode voltage gets closer to the source voltage. So for a nominal green diode voltage of 2.1V and a source of 3V anywhere between 0.9V and 3V can drop across the series resistor. So that's a factor of almost 3 (pesimistically, if we know NOTHING about the kink). But even still a factor of three change in current probably shouldn't take the LED from being just fine, to presenting no light.

Ok, if the battery really is at 3V then the output of the mcu pin may be more like 2.5, so that starts to be problematic, now we have voltage rage across the resistor of 0.4V to 2.5V so > 6 times variation, but again, that's very pesimistically assuming these diodes can have 100% variation in performance and that's at the lowest battery levels. What was seen happened even with fully charged batteries. I can't quite rule it out entirely with this logic, but it seems far fetched to me that Vf fluctuation should cause the observed results.

This is all much easier to think about if you consider current through the resistor, and treat the diode as an unknown.

Anyway, in the end I think we're saying the same thing, that it's the leakage, not Vf per se that is the issue, although a higher Vf could result in a higher leakage, so they're related. And yes, if they're really being driven at 20uA (155-135), wow. Yeah, maybe there's 10uA of leakage current in the diode. It seems to me that's maybe just driving them too low. If the mcu has 135uA of leakage anyway, just double it and aim for 260 total. Then there's probably no problem. A factor of 3 off in led current will still work then.

Mine was just marked as shipped.

The time from production stopping, fixing the issues, and shipping is remarkable.

I received an email from Banggood today telling me they would ship out my Q8 on 10/17/2017. My order date was 9/14/2017. So with shipping time, two + weeks, I’ll see it at end of October early November . Good things come to those who want in NOW!!! lol lol. All kidding aside, it is worth the wait. The hard one to wait for is the BLF GIGA BURN YOUR RETINAS I SEE YOU HIDING IN THE NEXT STATE GT FLASHLIGHT OR THE BLFGBYRISYHITNSGT for short :stuck_out_tongue: :wink:

Shipped also. My order was 630something.

Mine is out, too, shipped this morning!
Was in the early second 500!

On we go! :+1: