This trick could be done for a lot drivers to get any modes we want. Sounds good, heh?
Not only eswitch drivers, we could also wire a standard nanjg firmware in a light with a normal switch driver. I always wanted to try the 3T6 driver…
But anyway to get a direct drive driver we could also just make a driver board which hosts one big FET and a Tiny13, this could be put in every light we want.
But I like the idea of eswitch lights because they don’t need a crappy switch which will steal voltage and the srk lights are very good, small, bright and long battery life. Just the modes always fucked me up.
——
I tried 3 parallel irlml2502 with one samsung20r and 3 xml2 parallel and got over 10A which killed the FETs in small time. These sot23 are only good for 3A. So I made 4 footprints on the 20mm board. The last time was the 15mm driver with space for two but I doublestacked one. The good thing on the sot23 FETs is they have almost all the same footprint and especially the 2502 is available everywhere for cheap. For single XML, 3 or four would be enough.
—- @Macie
the good thing on an electronic switch with a microcontroller is the ability of any modes we want.
Bigger package, but it'll fit. Anybody who understands Datasheet Klingon want to take a look at the specs and see if it's worth a try? - http://www.st.com/web/catalog/sense_power/FM100/CL824/SC1164/PF64496
It has a low GS threshold so it will have low resistance on the few volts we are using.
Rdson seems low 20mOhm
Input capacitance 1265pF
Give it a try
Please also try a capacitor between VCC and GND!
I have given up on my soic clip RIP, sadly I wasted hours on getting it to work again.
I have soldered cables on a nanjg and tried it which also frustrated me because it was fiddly…
I now measure 250uA on 5V and 120uA at 2.5V on a fully stacked nanjg.
I have a capacitor on Vcc! On the 105c. It's moved to the topside of the board though, sits between the bottom pad of R1 & GND, see the first pic at the top of the page.
The blue single-FET driver works now with a 68 ohm resistor inline with the gate, it didn't work before with either the original 10 ohm resistor or wired direct to the gate with no resistor.
The 3 channel SRK driver I haven't messed with again, that one works but driving one channel at a time only.
I just tried the 3T6 driver and it works also. Yippieh!
Just cut the trace of the original PWM signal and soldered the new signal on, all modes work perfect. I tested it with a single xml2 and 4.8V.
This is an awesome concept! I've been lurking in this thread long enough... the Securitying SRK clone REALLY does some awesome output when modded! I bypassed the resistors and wow! It popped the protection circuits on my old FT Pana 2900s... That means over 5 amps drawn from each cell. I have it pulled apart now and am going to put some 16mm XM-L2s on Noctigons in.
Having the ability to add better mode selection and have low voltage warning/shutdown would be awesome, and this project would go a long way to easily (and cheaply) providing that to a lot of lights... along with massive current capability without having to stack 30 7135s and have master/slave boards.
None of my big pile of salvaged FETs will do anything close to what the one on the Securitying driver does. That thing is nuts.
This setup does a little under 10 amps...
It'll be used with the 3-up parts from one of the Securitying lights, and the Securitying awesome-driver will get the same treatment and will be used with the 6-up parts from the no-name 6XL2. :O
