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

So, the refund came 3h earlier this post and my order now is canceled for sureā€¦ā€¦ :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:

Thatā€™s beyond me, but thanks.

What isnā€™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 canā€™t find the switch in the dark. I donā€™t fault the designers, if they are younger they couldnā€™t know the issues that age brings on.

Dang! This is one very nice light! Iā€™ve only had it for 1 day and it has already moved the M43 into storage. Itā€™s takes deliberate effort to put the Q8 into ā€œother modesā€ 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. Iā€™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 broā€™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), ā€œWow, itā€™s definitely bright in there!ā€. Ceiling bounce was very noticeable to her in addition to the full daylight.

I eagerly anticipate my brother getting his hands on this light Iā€™m testing. I have another brother who placed his order directly. Itā€™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, Iā€™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:

Mine is on the way too :slight_smile:

The GT is a hard wait. Iā€™ve been wanting a thrower for some time. The tn42 had some tempting sales, almost got me. That was the light I was going to get before stumbling upon BLF and The GT.

Iā€™m also in for the ASTROLUX MF-02 groupbuy. It all comes down to timing if I end up with both.

The Q8 is worth it, even more so with production quality addressed along with the switch LEDs.

Shippedā€¦Fingers crossed

Had a bit of a scare this morning, the indicator led of the switch didnt work ON THE PROTO!
This worried me a lot.
But then I remembered checking voltage yesterday night and seeing some flashes after that.
So click click click (batt check) clickhold (advanced config) first setting click click, second setting click, third setting click click
And it works as normal.
Lesson, it is very easy to enter indicator led config from batt check and then 1 click turns the indicator off.
click click click batt check
click and hold 1,1 second enters indicator led config, 1.1 second is not very long.
the first setting has two options, 1 click for disable the indicator led and 2 clicks for enable

Very usefull to have it handy close to change, but batt check is of course something that is checked quite often, so it is often people are very close to indicator led config, maybe even without knowing. a series of clicks when thinking one wants to turn of can result in preceived odd behavior of the indicator led, while it is actually settings.
:slight_smile:

I got mine yesterday, itā€™s 99% awesome lol!
Been playing with it heaps, switch LEDā€™s still working great and are even in brightness.
Screws look fine on mine as well, not that I have any plans of taking it apart.

The only thing thatā€™s slightly annoying is a sharp bit on the bezel, catches on things (skin, clothes, inside of pockets)
Itā€™s a bit of a pain, a tiny tiny blemish on what is the perfect light.

That ramping UIā€¦amazingā€¦

Mine has shipped!!!

Depends on what the quality of the fixes is. If you will indeed find new better quality screws, no goop in the screw holes and a newly designed switchboard inside, I agree that they did a very fast job! :slight_smile: