New Convoy C8 – Clearly better

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teacher
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gchart wrote:
teacher wrote:
I just have to say this……….
You people who write THIS STUFF simply amaze me!!!!
Thank you and hat’s off to you………. Beer .. Thumbs Up

Heck, those that can even understand it impress me….. Wink

This world takes all kinds of people! Some of us code all day long, some drive tractors, other save lives. We’ve all got an amazing role to play! (not to down play TK’s great work – code can be a work of art sometimes!)
Well said ‘gchart’……. 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" ...................................

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msim
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J-Dub74 wrote:
Please contact Simon through the store. I’ll mention it to him as well but I know he will want you to contact him directly. This is the first issue I’ve heard of but this is all completely new. Hopefully it’s just a fluke. Any problems will be resolved properly I’m sure. Simon would not ask you to “live with it”.

Good news, seems like it might in fact be a fluke. Just did a quick test of my 2nd new C8 that I had left at the office, and it doesn’t show that behavior at all. Moonlight seems to work just fine on my 2nd one. Smile

teacher
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That is good news!!! 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 

 

                                             

DB Custom
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In all the hundreds of drivers I’ve built using the ATTiny13A MCU, I finally got one that glitched. It “shifted gears” unreliably, randomly, with no rhyme or reason. Built a new one, next MCU out of the sleeve, works fine. So apparently there are random fluctuations in the components that allow for slight differences and this sometimes trips us up when we’re using parameters that are right at the edge to begin with. Wink

I also once got a driver from a known high quality dealer that had a sense resistor glitch. Even the little simple sense resistors can seemingly be off by a significant margin once in a while. It’s been said before, if something CAN go wrong, it’s gonna find ME! Silly

gchart
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Thanks for the update, gentlemen. Glad it seems to be an isolated event.

And my apologies for calling TK’s code into question earlier. I was wrongly assuming that what was published on launchpad would be the same as what she sent over to Simon. Facepalm

DEL
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FWIW and until TK comments, PWM of 1/255 should work fine with this firmware.

(IIRC the PWM frequency is adapted to the mode: Lower frequency for lower modes. So the 7135s actually have time to consistently turn on fully even with very low PWM values.)

Wildcat
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Biscotti firmware works fine on all my flashlights with 6*7135 and 8*7135 drivers (s2+, s3, c8, old MTE with P7 led)

gchart
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DEL wrote:
FWIW and until TK comments, PWM of 1/255 should work fine with this firmware. (IIRC the PWM frequency is adapted to the mode: Lower frequency for lower modes. So the 7135s actually have time to consistently turn on fully even with very low PWM values.)

You may be onto something here.  As I said, I haven't actually flashed Biscotti onto anything yet, so I haven't a clue.  But Biscotti does adjust the prescaler and between Fast & Phase for the lower modes, so it very well could work with a PWM value of 1/255.

 

Edit: removed some misinformation to hopefully avoid confusion.

Wildcat
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Level here is a number of element in RAMP_FET array. So all works correct.

gchart
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Wildcat wrote:
Level here is a number of element in RAMP_FET array. So all works correct.

Ugh, good call. Serves me right for posting to forums while at work… read thru the code too quickly Facepalm

Lightbringer
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J-Dub74 wrote:
msim wrote:
DB Custom wrote:
\

Edit: I’m seeing values of 3,4,5,6,7,8,10,11… in the code for the 7135 driver. So 3 is the lowest and in some cases it’s not quite enough by a value of 1. If you set it that 1 or 2 higher, the vast majority complain it isn’t low enough. Set it low enough, a few get a driver that loses moon… whatareyagonnado?

I can live with it, but I would expect Simon/Convoy is going to hear from people who want a refund or new light because of the moonlight malfunction.


Please contact Simon through the store. I’ll mention it to him as well but I know he will want you to contact him directly. This is the first issue I’ve heard of but this is all completely new. Hopefully it’s just a fluke. Any problems will be resolved properly I’m sure. Simon would not ask you to “live with it”.

Naw, I mentioned that issue (questioned about it, actually) back in msg #81 here. It’s a fairly well-known issue, or so I thought. Smile

I think the problem is that when you’re parallelling 8 7135s, having to power up each one at once, all from a single µC’s output pin, there’s just a limited supply of current that pin can source, so the “capacitance” of all of them taken together needs time to “charge up” to +V, and if the width of that pulse is just too narrow/short, and that bank of 7135s “charges up” just too slowly, well, nothing happens.

If the bank of 7135s needs 2 pulses to get going, with a pulse-width of 125 counts, they’ll see 123 pulses worth of power. 81 pulses, they’ll see 79. 23, they’ll see 21. 5, they’ll see 3. 1, they’ll see… 0!

Not quite exactly accurate, but a reasonable facsimile of what’s happening.

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

Lightbringer
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J-Dub74 wrote:
Please contact Simon through the store. I’ll mention it to him as well but I know he will want you to contact him directly. This is the first issue I’ve heard of but this is all completely new. Hopefully it’s just a fluke. Any problems will be resolved properly I’m sure. Simon would not ask you to “live with it”.

Oh, sorry, and that’s why limiting the number of 7135s (eg, 6 vs 8) can help. If you only need 1.4A of power, better to use 100% at 1.4A vs 50% of 2.8A.

For a given lumen output, if moonlight would be a pulse-width of 2 at 2.8A, it could afford to be 4 at 1.4A.

And try 3, see if that’s reliable, and you’ll have an even lower moonlight mode (vs 4) with the 1.4A driver than with the 2.8A driver.

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

J-Dub74
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Lightbringer wrote:
J-Dub74 wrote:
Please contact Simon through the store. I’ll mention it to him as well but I know he will want you to contact him directly. This is the first issue I’ve heard of but this is all completely new. Hopefully it’s just a fluke. Any problems will be resolved properly I’m sure. Simon would not ask you to “live with it”.

Oh, sorry, and that’s why limiting the number of 7135s (eg, 6 vs 8) can help. If you only need 1.4A of power, better to use 100% at 1.4A vs 50% of 2.8A.

For a given lumen output, if moonlight would be a pulse-width of 2 at 2.8A, it could afford to be 4 at 1.4A.

And try 3, see if that’s reliable, and you’ll have an even lower moonlight mode (vs 4) with the 1.4A driver than with the 2.8A driver.


I know I announced the new firmware in this thread as the clear anodized C8 was the first to use the new driver/new firmware. That’s my bad. Oops

Would it be reasonable to ask that the driver firmware specific questions/discussion move to ToyKeeper’s firmware repository thread?

My main reason in asking this is that the questions and issues being discussed will be more easily addressed by those participating in that thread and also much more likely to be seen by the creator of this firmware. ToyKeeper did me and Convoy a huge favor by creating this and I feel she should be given the opportunity to respond to questions about her creation without having to try to keep up with this thread.

ToyKeeper’s thread about the firmware she develops is here.

I don’t even understand half of what is being discussed now Facepalm so I assume many of the people that are just coming to this thread to read about the new light will be completely lost.

If you think I’m off base here please tell me so. I do appreciate all this discussion and like I said this is almost certainly my own doing but it feels weird to be a confused passenger in my own topic wondering where the bus will stop next… Blushing

Ragsy
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I’m with you JDub, the firmware stuff while interesting reading, is better served being split out.

I’ll now go back and just keep waiting for someone to post beamshots of this thing in this thread

G'day mate, ow ya garn?
Yeah, nah good mate

Lightbringer
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J-Dub74 wrote:
Would it be reasonable to ask that the driver firmware specific questions/discussion move to ToyKeeper’s firmware repository thread?

Sure, go crazy…

I’m not sure how to “forward” a message to a different thread, so I’ll leave it to all y’all to figure out how to do that. Big Smile

And I wasn’t making any complaint or anything, just (initially) asking if anyone noticed that problem, and (now) trying to explain what’s probably happening. Wanted to make that explicit.

(It’s actually something of a hardware issue, too, so the firmware’s not really to blame. It’s an “edge” condition.)

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Hunter
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J-Dub74 wrote:
Hunter wrote:
Only thing that C8 needs now is remote pressure switch and we can actually use it for hunting Big Smile

It in the works. I’ll keep you posted.

Any news?
J-Dub74
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Hunter wrote:
J-Dub74 wrote:
Hunter wrote:
Only thing that C8 needs now is remote pressure switch and we can actually use it for hunting Big Smile

It in the works. I’ll keep you posted.

Any news?

Just that it’s getting closer. The original design was quite good but more on the generic side. The new design will still be fairly universal in application but will have a more distinct Convoy look. The factory has a prototype and I think we should see production reasonably soon. I promise I will post the info when I can.
eebowler
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I’d love to try out this new driver however, I do not like that I have to go through STROBE before getting to biking mode and battery checker mode. I’m not a fan of strobe on a bike light. ;/

My gratitude to those who are willing and able to help others (in whatever way you can)! Being human is more than just existing for yourself. Smile

gchart
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eebowler wrote:
I’d love to try out this new driver however, I do not like that I have to go through STROBE before getting to biking mode and battery checker mode. I’m not a fan of strobe on a bike light. ;/

Got a USBASP AVR programmer and SOIC clip? If so, you could either tweak Biscotti or one of us could do it for you… you’d just need to flash it. If you’re interested, either hit me up on PM or head over to TK’s firmware thread.
maukka
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Boy am I glad I ordered the clear C8. The finish is just beautiful and compared to say the unanodized BLF A6, this feels so much better with the clear coat. The thread are also smooth as can be. I got the 3A tint and it is just perfectly neutral white. For a thrower like this, maybe just a bit warmer would be better, but can’t complain.

Tint in different modes:

Tint in different parts of the beam:

maukka
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Some photos.


BLF X5, BLF X6, Eagle Eye X7, Acebeam EC60, Convoy C8, Acebeam K60


BLF X6, Convoy C8

msim
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Just to close the loop on the moonlight issue on one of my C8s, Simon has offered to send me a replacement driver!

That’s about as good of a solution as I could have asked for, so I’m happy with that outcome. Smile

maukka
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CRI Data. Pretty much your standard CRI70 affair.

DB Custom
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Awesome work there Maukka!

tops2
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@maukka: Thanks for all the info! Man, I thought the C8 and BLF X6 were slightly large (at least compared to my lights)..but seeing it next to the Acebeam K60… Shocked
I can’t even imagine if a light like the Olight S1..or even the Nitecore Tube will look like next to the K60 (or any of these other lights)! lol

eebowler
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Thank you gchart Big Smile but, I don’t have the capability to program chips. :/ It’s all right Smile

My gratitude to those who are willing and able to help others (in whatever way you can)! Being human is more than just existing for yourself. Smile

T18
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Hi J-Dub, First of all I want to thank you for your kind comments last night over on the L6 thread and being I am habitually long winded I’d love to explain what I saw nearly immediately with my new Clear C8 the instant I turned it on and suspect it is only a QA sort of issue, but I don’t have the time this morning to really get into this light, probably tonight, but what I’m seeing in the lens would certainly cause a customer who is just a normal person some sort of freak out I think, it looks weird, I’ve never seen anything like this and I’ve cleaned the outside of this lens but NOT the inside and that may be all it needs, but a regular person might not be able to do that much and would be after Simon and probably as mentioned freaked out, so please take a look here at what I saw when I turned on the light, I have to get hopping here so will be back this evening to see what you think, is this also the first time that Simon has included the anti reflective lens with the finished light? I think I read that somewhere but am not positive, got to go, follow the X’s, Thanks JDub and I’m equally excited about this light also, wow L6 and now the C8 all in a couple days, fun fun fun, and broke broke and broker … but LOL Cash
Oh ya, if you click on pic you can enlarge them to get a better look, I didn’t check but it’s supposed to, maybe ha ha ha I am hurrying as fast as an old turtle in mud..

!{width:90%}

!
J-Dub74
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maukka wrote:
Boy am I glad I ordered the clear C8. The finish is just beautiful and compared to say the unanodized BLF A6, this feels so much better with the clear coat. The thread are also smooth as can be. I got the 3A tint and it is just perfectly neutral white. For a thrower like this, maybe just a bit warmer would be better, but can’t complain.

Tint in different modes:

Tint in different parts of the beam:
!http://i.imgur.com/xuHmXls.png!


Awesome! Glad you like it and great work on the data. Thumbs Up Thank you!
unknown00101
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Sad

I’m kinda disappointed with my clear C8. The AR lens was mishandled before/during assembly, smeared with grease and large particles of dust/dirt mixed in and a few in the reflector. There’s a couple dents under the anodization at the seam of the head/bezel. There’s also a small defect in the reflector.

The bezel and tailcap weren’t machined quite right. When tightened, on one side of the seam it is tight and smooth, but the opposite side has a small gap and sticks out slightly creating a small ridge that is noticeable when holding.

Thankfully the particles in the reflector were removed with a quick blast of air. The grease was removed after a bunch of passes of hot soapy water, but there’s still a bunch of tiny specks left over.

DB Custom
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None of that sounds like any Convoy I’ve gotten. Crazy!

Contact Simon, he’ll make it right…

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