Also did S2+ M3 M21A M21B.
I’ll risk it, much improvement in output?
Also did S2+ M3 M21A M21B.
I’ll risk it, much improvement in output?
300-400lm I think - I’m basing it off this:
My lumen tube isn’t quite ready
I gained around 300 lumen with an R050 on the SST40.
The FT03 is still brighter, its driven quite hard
Wow, so bad?
I have to replace the driver in my nephew's S2+, torch predominantly used with the short tube, guess I won't mess with thermal throttling in that one. The other driver, though, is another story.
Hello guys
What about the Convoy M3 driver ?
How can i remove it?
Maybe this thread helps, driver might be sonewhat different though
Not necessary, posting detailed (macro) photos will do. Removing the blueish foamy thing, might help though. Here we go - not the best macro shots in the world, but a quick one while I have a few moment being left alone I know it’s not the M3 driver, and they actually look quite a bit different, so it’s probably useless for what you’re after. https://imgur.com/a/0cqCG4U my guess would be this one can you try to measure resistance? also, try to measure wi…
Maybe this thread helps, driver might be sonewhat different though
【convoy】SFT40 5000K back in stock (sufficient) - #1810 by Yokiamy
The M3 has different driver, I’m not sure I find it correctly =((
I think i found it =D
Good info. I just ordered a few of these and I’m sure I will do this mod.
These drivers with the stepped modes look like constant current linear mode FET drivers like led4power’s. Is the other ‘ramping’ driver from convoy mentioned above also this type of driver? The description and UI seem strange. Is the current limited to 8A?
Satan@103TFS:@Barkuti what do you think if I just bypass “5mΩ” with the wire to run XHP50.2 3V I’m not sure if it a good ideal.
If you do that the driver won’t be able to regulate at all. This means no ramping and no modes. I haven’t tried it, though.
You still need to tweak the sense resistor stack value for it to work. You could try an R004 on top, it could work well or it may not. Add some heatsinking to the thing in such a case, as you’ll be above the maximum power rating for single 1206 resistors (a couple stacked one doesn’t changes this significantly). A good mound of thermal glue above sense resistor and MOSFET could help.
oweban:… I assume R010?
So what I’m understanding is that more resistance = higher amperage… Now to work out the right number to hit ~7.5A
…If the driver uses R010 for 6A this means sense voltage is Vsense = R × I = 10mΩ × 6A = 60mV. If you want to add 1.5A, you need Rextra = V / I = 60mV / 1.5A = 40mΩ or an R040 in parallel with the existing R010.
I have not measured how that driver behaves actually but if you really want to be sure to hit 7.5A, add some more conductance is my advice. I’d look for an R030, which would raise the maximum current to 8A theorerical (6A + 2A), albeit it would leave the actual figure in close proximity to 7.5A effective due to MOSFET heating, imho.
Hi Barkuti & folks,
Can I ask, where is the sense resistor on this board to be sure?
Smarter Shopping, Better Living! Aliexpress.com
I have ordered the 20mm board 6A version which I supposed is the same as the 17mm/22mm one. Would you be so kind to show me where it is? thanks
Look at your link picture and it clearly shows R010
…
Can I ask, where is the sense resistor on this board to be sure?
https://www.aliexpress.com/item/33024197621.html
…
The sense resistor is that big R010 chip resistor onboard, down there in this photo:
That looks to be 2010 imperial size.
Thanks for the reply, Guess what? I have bought the 1210 sizes and its on its way! Haha, I read it off other threads of the similar driver but in a 17mm size I think?
Since 2010 size is 5mm x 2.5mm and 1210 is 3.5mm x 2.5mm, I suppose this allows me to join two resistors serially to lower the output (which was my main objective anyway).
I actually do see another R010 on the board, at the left side of the 10pin IC. Could that be the sense resistor as well? Regs
jacc:…
Can I ask, where is the sense resistor on this board to be sure?
https://www.aliexpress.com/item/33024197621.html
…The sense resistor is that big R010 chip resistor onboard, down there in this photo:
That looks to be 2010 imperial size.
The sense resistor is the small black one at the very right of the board in that pic; “north east” of the MCU
The sense resistor is the small black one at the very right of the board in that pic; “north east” of the MCU
Oh thanks for the double confirmation. Looks like I will be having a tough time trying to fit 1210 resistors there
The sense resistor is the small black one at the very right of the board in that pic; “north east” of the MCU
I don’t think you’re correct. Barkuti has modified these boards before so I’d be more inclined to trust his answer
Oops sorry I was thinking about the thermal resistor. Brain dead lately.
Apologies everyone, barkuti is right. I’ve done the mod on those sense resistors myself.
Anyone know which component is the thermal resistor on the 17mm driver of post #6? (bottom picture). There’s two components within the drawn cicle
The upper one Funtastic. I could also say the rightmost one, and so it is valid for both top (∅22 mm) and bottom (∅17 mm) driver pictures.
The upper one Funtastic. I could also say the rightmost one, and so it is valid for both top (∅22 mm) and bottom (∅17 mm) driver pictures.
Awesome, many thanks