Well it runs fine at a PWM value of 5, or this FET does anyway. It might be different with different drivers (like, multi-channel drivers with more than 1 FET) or a different single FET. I think 5 is the minimum with whatever CPU clock DrJ used, I know less than nothing about the code.
That's a normal 105C still using the 8x7135s, it may be different running the FET. As a test I gave it modes of 0,1,2,3,4,5,100,255 just to see what happens (DrJ has a comment in the source that 5 is the minimum, but I think most folks know by now about me and following instructions...). It makes no light at all in the 1/2/3 value modes - it might behave different in a triple, with LEDs in parallel (lower Vf threshold).
HA HA!
uint8_t modes[]={0,1,2,3,4,5,20,100,255}; //PWM values, 5..255 - LEAVE THE "0" THERE
It makes light on ALL modes with those settings, on the 105C piggybacked onto the JB/K4212 driver. Stupidly low output on the lowest mode. lol :D
edit: Mode spacing looks better using 0,1,3,8,20,50,120,255; the first attempt was 0,1,4,9,20,70,140,255.
Ever seen a SRK do this?
:bigsmile:
though, I think I like Werner's UI better, just don't tell anybody I said that :8)
Nice.
From my experience Xml2 are better for this glowing, in my m6 the xml2 glows until battery reaches 2.5V the XML1 is flickering a lot earlier.
I need the brain people again -
I found a source, in the U.S. even!, for a bunch of Vishay SUD70N02-03P (pdf: http://www.vishay.com/doc?72246)
I've gone a bit crosseyed trying to slog through datasheets, but this one looks to have half the Rds(on) as the K4212... .0042 ohms vs. .0085 ohms. Right? And it should work without changes in the same circuit as the K4212? Logic-level thingamajig and the rest?
:tired:
I'm really digging Werner's UI. Being able to start on high or low without cycling through is awesome! Very responsive. Just need a lower low (moonlight) and I'll be happy with this setup.
How low it can go and still make light will be highly dependent on the hardware. If he releases the source when it's ready so everybody can plug in their own levels... :love:
And yeah, who needs memory when you can make it do whatever you want? I can never remember what the last mode was, so it's not much help if the light remembers it.
DrJones' MiniMo FW, 7 modes (PWM values of 1,3,8,20,50,120,255), input pin switched from star #4 to #3 to be compatible with the same wiring used with Werner's FW. Both .hex & .txt in here: http://75.65.123.78/fw/
The lowest mode with a PWM value of '1' gives 0.3 lux in the ceiling bounce test. Not quite moonlight... but on the same meter, a stock 2-mode SRK driver's low mode did 10.9. :D
Final version of the no-name 6XL2 driver
FET is a recycled TO-263 Infineon IPB05N03LB, supposedly a Rds(on) of 6.1milliohms. I left the 10/10k resistors in place, don't know if they're necessary with this FET but it works and I think if this poor PCB has any more soldering done to it there won't be any traces left.
Sweet! Piggybacked PCB for t3h w1n!!! :D
What amps are you pushing to those 6 XM-L2's...daggum that thing has GOT to be getting warm, let alone throwing some CRAZY light!
I can only guess at the total current, my meters get flaky even with big fat leads. When measuring and the meter showing around 9.5 amps, shorting the leads (bypassing the meter) just about doubles the light output.
The 6x XML2s are in one of the gold Securitylng lights and using one of the red 'JB' drivers. I don't currently have a home for the blue driver.
Ceiling bounce numbers, using Samsung 20Rs, the 3x XML2 T6 3B light does 241 lux and the 6x XML2 unknowns does 273 lux. A stock ~6.5A 3x XML SRK does 54 (yes, fifty-four, lol) lux.
Good grief! Almost 5X the output with just a little tweaking! Good job!
Silly question...short of dunking it in a bucket of ice water, what do you do to keep it cool? I mean that thing must be getting hot in seconds
Heat isn't a problem, not with a user-friendly UI with either 5 (Werner's) or 7 (DrJones') levels available. Level 3 on Werner's and level 5 on MiniMo are both more light than the stock SRK.
I have done A Thing and it has had interesting results...
Werner's 5-mode on low, left; MiniMo 7-mode on low (PWM value of '1'), right:
The beefy little toroid goes between the two pads that originally held the limiting resistors, so it's just stuck between BAT+ and LED+. Still using Werner's 098b which has a lower low than the previous versions, but it wasn't THIS low, and output on high is the same as before. Is it possible just adding a toroid has caused this?
Gate drivers? We don't need no steenkin' gate drivers!
Works beautifully. Everything - absolutely everything - except the three FETs, can be removed (well, maybe keep the cap where the 105C is picking up the BAT+). Attiny PWM-out is tied straight onto the gates, with the 3 gate drivers removed everything else on the board is inert and not needed.
It does 4.18A, one channel into a single XML2/Sinkpad. All 3 channels tied together to the same LED, around 4.80A. The stock FETs (AO4468) are not very good, at least according to the datasheet, 18 milliohms.
The 3 channels/1 LED thing isn't really representative because of Vf issues, more LEDs will increase the output. I imagine in a 6x light, with 2 LEDs per channel, it'd do around 5A x 3.
That is impressive. And some sweet looking soldering. Wish I could do that without bweakin it.
Still following this closely.... :-)
Lol what is/was this copperpipe?
I guess there is no longer a problem with the ground connection :bigsmile: