i’m making a driver sample for red LED
30–100 two modes
Does the 6amp driver really gives 6amp to the led? or are there loses somewhere? (this might be a stupid question)
yes, indeed 6A
Being a linear driver, it will deliver up to 6A. To deliver 6A there must be a minimum voltage difference between input -cell voltage- and output -emitter- because current flow times resistance (the very battery cell, springs, switch, cables and contacts, etc.) causes a voltage drop. So, once battery voltage drops below a certain point, i.e. once it gets close enough to the Vf of the emitter, the driving current will start to drop below 6A, reducing progressively down from there as it happens with “MOSFET direct drive” drivers.
Anyone got the new M21C-U with side switch? I would love to see how the new ramping works.
At present, Chinese buyers mainly feedback two opinions. One is that the reaction speed is not as fast as Anduril, and the other is that the ramping time is a bit long.
got mine today.
The ramping UI is almost like sofirn sp70. I suspect Sofirn made the driver/firmware?
Built is robust and feels good in hand. This light definitely win win over EC03 (horrible tint and biggest regret)
I like this light alot Simon. Good work and please make drivers with same UI for M3 
Clip from youtube (not mine)
This driver is similar in function to anduril, but the code is rewritten, which is more conducive to compatibility with components.
The charging version of M3 will be launched soon, it applies this ramping program.
Has anyone measured throw (kcd’s) of the M21C-U with xhp-70.2?
did anyone do the w1 or w2 mod in the convoy z1?
Did anyone did measument? will i get more candella then with c8+ w1?
It probably will beat it if you focus it 100% but I dont think anyone has done more extensive mod yet.
That new T2 has finally arrived. Goodbye visible PWM 
The previous version was simply horrible in this regard.
Great , thanks for the video. My vietnamese is “rusty”. How do you personally like the Ramping.?
I think Simon commented that he doesn’t recommend it for throw. Maybe that’s why no measurements,
I assume everyone is getting a Smooth Reflector.
I read in a M21C review thread, that orange peel in combination with XHP702 makes the beam look “nicer”?
I also wonder how Simon’s new Osram White flats would perform in a M21C-U with the 6000mA driver.
The ramping is smooth from 0 to 100% with one blink when reach high same with low.
In comparing with Anduril firmware , ramping from 0% to 50% is similar speed. From 50% to 100% it’s just a touch slower than Anduril.
M21C-U can access Moon mode from off by long press and double click for turbo or single click for off. Andruil is slightly better as you can access moon mode from off and can continue ramping if desire.
M21C-U firmware is very similar to sofirn sp70. I have not seen the code but the user interface is almost like sofirn sp70
In terms of throw it’s similar to Convoy L2 or L6 with smooth reflector. The led in perfectly center and simon has done great job.
Overall I really like this light way better than EC03 in terms of build, tint selection and thermal distribution. The other thing i like about this light is that it run on single battery using boost circuit to power XHP70 with ramping UI. I dont think there is a light on the market have ramping UI like this yet.
I will post some beam shoot this weekend. It’s just hard to find time with 8 months old baby.
do you know when it will be available for sale?
Hello Simon,
Just wanna say hello here.
I’ve bought some Convoy Flashlights at your AliExpress store and I’m very happy with your products 
2020/7/30 M21C-U available now
Convoy M21C-U flashlight, XHP70.2, ramping
That’s a great flashlight. I’m especially interested in the UI.
Wait….the Osram red is 2.4v so can I not use a regular 8*7135? I’ve built two with that driver for 230 lumens and all seems fine, it certainly hasn’t killed it
I’m guessing Mateminco has also used the same driver at 3 volt for their FT03 Mini model using all 5 colors