I agree this doesn’t seem like a ramping driver at all. When I think of ramping flashlight I think like the Astrolux FT03 and that style UI (Narsil). Not basically 2 custom brightnesses and a third that you can choose a brightness or strobe. The UI is what has held me back from getting another convoy, I’m not interested in the 4 mode or 3/5. I really like the biscotti but it is only on the C8, I think one of the M series, and a gray S2.
Edited : The M1, and M2, models with the XPL-HI led have biscotti firmware. What I have noticed is the newer models with the sst-40 led’s have the 4 mode driver.
Is there any way to get this UI/firmware to have memory mode? I want it to come on in low mode or ramping. Someone above stated that both of the first two modes are programmable? Is that correct? Thanks in advance.
I have this driver and it’s pretty nice. It’s bonafide direct drive on high and the firmware is…interesting. Definitely not a ramping driver, but stepped brightness in the 2nd mode.
As far as programmable,as I understand, 2nd mode has memory, 1st mode I haven’t been able to tell.
There’s not a way to flash firmware to it that I can tell so you’re stuck with high to low modes. If you want a vastly I mk proved firmware, get the temperature controlled driver from Simon on Aliexpress and ask for Biscotti formware on checkout. He will flash it on and I really like it. It won’t be as powerful as prior one, but I think it makes up for it with the new firmware.
Has anyone ever tried to modified this for 2 cell series into a 6v LED? Just wondering if the zener mod principle would work on these like a nanjg/7135 driver or not? or another way to mod it for 6v leds? Speculation welcome.
Hi everyone, I asked this twice in my own thread but it got lost in the conversation. So I thought I might have more luck in a thread that directly relates to that driver, if I may:
I am looking for insight in difference of efficiency of drivers (preferably but not necessarily regulated and without PWM) at low lumens (say 100 - 400 lm) in an unmodded light for long bike rides.
So far the SST40 seems the most effective led in balance of throw(&spill) vs lm/watt. But a regular linear driver with SST40 at @ 250lm / ca. Vf 2.75 has an efficiency of ‘only’(?) 80%. That is, 1/2 * (2,75/4,2 + 2,75/2,9): battery till just below 3v.
Has the presently discussed regulated FET diver in two amp modes better efficiency in lower lumens than a regular linear driver (e.g. M21A [and the new C8G?])? How do either compare in lower lumens with regular FET+1 drivers (e.g. FT03)?
Elsewhere, Simon Mao claimed 95% for his 8A buck driver (L21A). Is such efficiency common with our cheaper flashlight buck drivers? If so I might do well to hold off buying until an equivalent driver would trickle down in a C8+? Could that happen?
