New Convoy C8 – Clearly better

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

Lightbringer
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Swib wrote:
DB Custom wrote:
4.5A with a modern XM-L2 makes for a very nice C8, with little real world difference in output compared to an FET driver.

Any idea if it gets hotter compared to the FET? I thought I read that the FET ran cooler than a high current regulated driver.

It should, actually. FET drivers just crowbar the battery across the LED with minimal resistance, measured in milliohms (mΩ), so the voltage they’d drop would be negligible (Vf ~ Vb), vs 7135s which drop the difference between Vf of the LED at that current and the battery voltage, or about 0.1V (100mV) minimum. So 4.2V from a fresh cell and 3.6V Vf is a 600mV difference (vs much less with the FET).

Drive a red XP-E (~2V) with 7135s, and they’ll all join hands and limit current by soaking up all that excess voltage and burning it off as heat. Crowbar the battery directly across it with a DD FET driver, and the poor XP-E will die a horrible fiery death.

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Lightbringer
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DB Custom wrote:
It’s obviously not “chrome” but has the same surface of the matte black, without the dye. I’d kind like a high polish SS variant myself. Smile

These are made by and sold by Convoy-Flashlights on AliExpress. They’ll be found at GearBest and Banggood soon enough I’m sure. Simon is Convoy, JDub is working with Simon to help bring the needs of the people to light. (see what I did there? Wink )

Mmm, I saw from the pix it’s (thankfully) not a mirror-finish. Nice…

Flashlight-porn… Big Smile

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Lightbringer
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ToyKeeper wrote:
So far it’s called bistro-mini, because it’s based on bistro but half the size. People have told me this is a bad name though, so I’m considering some others…
  • biscuit or biscotti, to keep the tie to bistro but indicate something smaller

“unistro”? Big Smile

“mini-stro-ni”? (Okay, booooo…)

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stephenk
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Lightbringer wrote:
ToyKeeper wrote:
So far it’s called bistro-mini, because it’s based on bistro but half the size. People have told me this is a bad name though, so I’m considering some others…
  • biscuit or biscotti, to keep the tie to bistro but indicate something smaller

“unistro”? Big Smile

“mini-stro-ni”? (Okay, booooo…)


Finger buffet?
Snack bar?
blueb8llz
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J-Dub74 wrote:
blueb8llz wrote:
Lovin the new color. Upgraded driver now is nice also. I hope theirs an option to buy with 8-10× 7135. One thing I wish they changed was the tail cap. It should have cut out slits on them like the thorfire c8s. It makes turning on/off light much easier, and is still able to tail stand. The way it is now, it’s too recessed.
I thought about asking Simon to add the recessed thumb groove but then I played with a few of my C8s and thought really I don’t care as I’ve never personally had a problem using the C8 switch even with gloves on. So, in my opinion it’s not too recessed but if the majority disagrees and wants the thumb grooved tail that can easily be added.

If it can be easily added, why not make it a option. $1 extra for cut out slit tail cap. I think it would do well. For those that have tried cut out slit tail caps, you won’t go back to regular ones.
No matter how recessed the switch is, you should still be able to turn on with gloves. But the cut outs just make it so much more comfortable and easier.

Serp
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Serp wrote:
ToyKeeper wrote:

In general, it is quite interesting firmware.
I’ll try it now flash in the Convoy C8.
From the description, I did not quite understand how the adjustment, but I think I can figure out.

What FUSE?

Why did you decide to abandon the separate control group of chips AMC7135?
1*7135 in the fifth leg, 2*7135 in the second, the other on the sixth leg of the microcontroller?

fuses are low: 0×75, high: 0xFF

tech
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Huge thanks to the team that made this light and this firmware happen! Just flashed a S2+ with the mini-bistro and it is pretty much the most amazing piece of software I have seen on this light. Works out of the box on the S2+ with RMM’s Moonlight Special v3 driver and 4× 7135 (380mA).

I used the following fuses:

sudo avrdude -p t13 -c usbasp -Uflash:w:bistro-mini.hex:a -Ulfuse:w:0×75:m -Uhfuse:w:0xFF:m

works.

Serp
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I liked modes. I made myself a driver and it is very easy to configure.
Driver wonderful.

MRsDNF
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Your efforts and achievements are amazing TK. Nice work and thanks. Smile

My current and or voltage measurements are only relevent to anything that I measure.

Budget light hobby proudly sponsored by my Mastercard and unknowingly paid for by a hard working wife. 

djozz said "it came with chinese lettering that is chinese to me".

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

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Nice UI!

I have EDC-ed a triple with the intl-outdoor RGBW driver for a while, which has the same ‘long press goes to first setting of the mode group’ and I can tell that is a very pleasant feature. That RGBW driver has some annoying blinkies at the end of the mode group but in actual use they are not annoying at all because you never have to go through them.

Aggressor
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ToyKeeper wrote:
The problem is that new driver hardware was beyond the scope and budget of this project, and Convoy doesn’t have a lot of resources to develop it or get the hardware produced right now. So, the driver is the same hardware as before, but with new firmware to improve it as much as possible. The nanjg drivers are actually pretty nice, and inexpensive, so they work pretty well.

Maybe in the future sometime Convoy can get new driver hardware, but not yet.

Noob question: could standard Nanjg 105c/105d driver be used to independently run only some of it’s 7135 chips (with appropriate firmware)? If not, how much of a change is required to add this support, considering these drivers are produced specifically for Convoy, as J-Dub74 said?

Serp
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No. All AMC7135 is parallel.

will34
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Aggressor
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Serp wrote:
No. All AMC7135 is parallel.

But in the link you provided, this support is added with only two wires? Who whoever produces these driver boards, could add this support very easily in a new board revision?

Hunter
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Promo price for first 100 buyers?

ToyKeeper
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Serp wrote:
What FUSE?

Why did you decide to abandon the separate control group of chips AMC7135?
1*7135 in the fifth leg, 2*7135 in the second, the other on the sixth leg of the microcontroller?


The fuse settings are in bin/flash.sh in the repository:
avrdude -c usbasp -p t13 -u -Uflash:w:$FIRMWARE -Ulfuse:w:0x75:m -Uhfuse:w:0xFF:m

The stock nanjg drivers do not have the 7135 chips split into groups; there is only one power channel. So, that’s what the firmware uses. The code is written to match the hardware, and the hardware could not be modified for this project.


blueb8llz wrote:
For those that have tried cut out slit tail caps, you won’t go back to regular ones.

After trying both, I actually prefer tailcaps without the finger cutouts. They tailstand better and I don’t have to care which way the light is rotated.


tech wrote:
Works out of the box on the S2+ with RMM’s Moonlight Special

It’ll work, but it doesn’t use the extra power channel on the moonlight special. If you have 4×7135 total, it’ll only use 3×7135. You might want to look at the blf-a6 firmware for something which uses both power channels, or blf-a6/tk-otc.c or blf-a6/cypreus2/, or whichever flavor of STAR suits your needs. Or you could modify bistro-mini to add 2-channel support back to it, but it’ll use more space and there’s literally no space left by default so that means removing something else to make room.

You may also want to recalibrate the voltage values, since I don’t think RMM’s drivers match the nanjg drivers exactly. And you could probably make moon run faster (8 kHz) too, since RMM uses higher-quality 7135 chips.


stephenk wrote:
Lightbringer wrote:
“unistro”?
“mini-stro-ni”?

Finger buffet?
Snack bar?

Okay, I get it. Asking for name input was probably a bad idea. Smile

If nobody has any major objections, I kinda like “biscuit”.

MontyPyfon
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I knew I should stay away from this forum.
Now I have gone and ordered two new clear Convoy C8s and 1 clear L6.

Some people never learn. Big Smile

To many flashlights, too many batteries. Wife is going to kill me Smile
S2+: 10, SRK style: 7, C8: 10, L2: 3,  L6: 2, Couri XM-L2: 1 LuckySun BLF SE: 3, EagleEye X6: 2   and lots more....

Monty

Serp
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Aggressor wrote:
Serp wrote:
No. All AMC7135 is parallel.

But in the link you provided, this support is added with only two wires? Who whoever produces these driver boards, could add this support very easily in a new board revision?

look at this http://budgetlightforum.com/comment/744725#comment-744725

tech
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ToyKeeper wrote:

tech wrote:
Works out of the box on the S2+ with RMM’s Moonlight Special

It’ll work, but it doesn’t use the extra power channel on the moonlight special. If you have 4×7135 total, it’ll only use 3×7135. You might want to look at the blf-a6 firmware for something which uses both power channels, or blf-a6/tk-otc.c or blf-a6/cypreus2/, or whichever flavor of STAR suits your needs. Or you could modify bistro-mini to add 2-channel support back to it, but it’ll use more space and there’s literally no space left by default so that means removing something else to make room.

You may also want to recalibrate the voltage values, since I don’t think RMM’s drivers match the nanjg drivers exactly. And you could probably make moon run faster (8 kHz) too, since RMM uses higher-quality 7135 chips.

Spot on, Toykeeper and thank you. The tail cap reads 1.13A (3×7135 instead of 4). I will just solder off the last AMC chip and keep this light as it is. Your software is just too amazing!

Will have a look whether I will adapt it for multi-channel drivers as 3× 7135 is bright enough for my simple EDC lights.

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MontyPyfon wrote:
I knew I should stay away from this forum.
Now I have gone and ordered two new clear Convoy C8s and 1 clear L6.

Some people never learn. Big Smile

We now know your name is J***n G. Smile

MontyPyfon
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Oy! Smile

To many flashlights, too many batteries. Wife is going to kill me Smile
S2+: 10, SRK style: 7, C8: 10, L2: 3,  L6: 2, Couri XM-L2: 1 LuckySun BLF SE: 3, EagleEye X6: 2   and lots more....

Monty

ToyKeeper
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tech wrote:
I will just solder off the last AMC chip and keep this light as it is.

I have a wight PZL driver (wight’s version of the Moonlight Special) and I use a lightly-modded version of blf-a6/cypreus2 on it. I like having more blinkies instead of runtime config options. The interface is more or less as shown in this diagram:

You would need to recalculate the ramp and calibrate the voltage and maybe recalibrate the OTC values too, and it’s possible the two power channels might be swapped… but otherwise it should work. Smile

Mine is in a 8×7135 light with a triple 219B in a one-of-a-kind compact brass 1×18650 host Dale made as a challenge. It only makes 800 lumens, but it’s 800 really nice lumens.

DavidEF
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ToyKeeper wrote:

Okay, I get it. Asking for name input was probably a bad idea. Smile

If nobody has any major objections, I kinda like “biscuit”.


I prefer “biscotti” for two reasons: 1) It sounds nicer, more refined, more serious. 2) I love coffee. Big Smile

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
-Ayn Rand

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Hunter wrote:
Promo price for first 100 buyers?

Promo price for BLFers, pretty please? Big Smile

Aggressor
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Serp wrote:
Aggressor wrote:
Serp wrote:
No. All AMC7135 is parallel.

But in the link you provided, this support is added with only two wires? Who whoever produces these driver boards, could add this support very easily in a new board revision?

look at this http://budgetlightforum.com/comment/744725#comment-744725

Thanks. So basically manufacturer of Nanjg 105c/105d could easily and for pretty much the same cost produce a version with independent control of 7135 chips? Perhaps this is the route Convoy should take? Considering these drivers are produced specifically for Convoy, as J-Dub74 said?

giorgoskok
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TK , where can i find the biscotti firmware ?
(Yes , i like this name LOL )

Xoden
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Aggressor wrote:

Thanks. So basically manufacturer of Nanjg 105c/105d could easily and for pretty much the same cost produce a version with independent control of 7135 chips?

I don’t think you can motivate them enough to adopt a different PCB design. Or maybe I’m too skeptical.
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Omega_17 wrote:
Hunter wrote:
Promo price for first 100 buyers?

Promo price for BLFers, pretty please? Big Smile

Compared to pretty much any other brand, all of Convoy’s prices are promo prices. Simon doesn’t mess around with inflated prices so he can offer “deals” on special occasions; he keeps his prices low by default. He doesn’t skimp on parts or quality either; ever since he got into lights he has consistently made top-notch items. Many of BLF’s biggest projects have attempted to deliver Convoy-level quality but most have fallen short. It’s kind of amazing he doesn’t charge more.
Aggressor
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Can this new firmware be flashed to existing stock Convoy lights (S2+, M1, C8)? Does it matter if the light was purchased with default 3+5 mode group or some other mode group?

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