“On some drivers this can affect mode selection unfortunately”
I have Lexel battery FET switch and my old type of driver lost no memory effect and went to next mode memory…
But I use different single mode driver so mode changing is a matter of past for me. But anyway it would be nice that this works for people that still use multimode drivers
If soldering bleeder resistor to driver is easy like this it should not be big deal in soldering that resistor.
Couple of pictures explains better than thousands of words…
That picture is a valid example of a bleeder mod. On some drivers that may be the best spot, but others maybe not. The only rule is a resistor goes between Bat+ and gnd. Very simple.
I’m not going to buy every driver in the world and test it with this switch. It’s made for modders, so while I will do my best to guide people and answer questions as I always do, I’m not making any promises. For the members buying these in qty to resell, it is ultimately on them to do the R&D to validate what they make and sell. This is a hobby for me, not a business. I do things for fun and for helping out the community, but I have limitations. I’ve already been pretty generous I feel and offered to test a handful of go-to drivers if someone sends me one. Also, my offer still stands for people to pay shipping on the Beta run of boards to test against their products. If you are interested in that PM me. PCBs should show up this week and I could have them out next day.
I now understand that bleeder mod on driver… Piece of cake I think that it is not big deal for personal mods or if someone starts with flashlight sale from 0.
But it is big deal and problem if someone who already sold lets say 200 of lights on market and now he wants to offer special version of FET switch because that switch won’t work with that lights because previous versions of lights don’t have bleeder resistor modd on drivers.
My testing would not be relevant to BLF members because I have market unavailable single mode FET drivers made for me by Led4power.
The best test would be on generic type of drivers(Simon, Mountain Electronics, Kaidomain, etc) that most guys use here.
Looking good… :+1: Maybe you guys could also offer version of switch without bleeder resistor modd on driver? If only solution is battery powered than I am pretty sure there would be great interest for such versions too.
But of course this FET capacitor switch with driver bleeder resistor modd is much better solution for someone who does personal flashlight modd or if he is starting flashlight business from scratch…
Some personal life events taking me out of the spirit. I have received the boards and parts, built one by hand, tested it. Performs as I was describing earlier in this thread. Mosfet capacitance being high is keeping the gate resister in the low single digit megaohms, therefore restricting constant on time with multimode builds. The lower the Vf of the LED the better it seems. Overall it does what it’s supposed to do.
I’ll look into bringing this back online later this week.
Ah, I was still waiting on a price for tracked shipping to NZ for a beta switch on post #11. Definitely can’t commit to 100pcs without first testing whether it’ll work, can’t have modes messing up
That L21B’s focus is terrible. Simon mentioned he wasn’t happy with it, but man this sucks. I had to alter the focus and lift the reflector up higher, now it’s very decent. I have now noticed that the L21A’s focus isn’t optimal either.
You’ll need to mod the driver on both the L21A and B since there’s no positive spring. You could end up denting the battery and damaging the driver from the recoil
Please let me know how you fixed the L21b. I agree it’s not right (and Simon also explained he’s not exactly happy with it as well). I have four I need to “get right” Thanks for any advice on this Funtastic!
I think that it is not big deal for personal mods or if someone starts with flashlight sale from 0.
Maybe you guys could also offer version of switch without bleeder resistor modd on driver? If only solution is battery powered than I am pretty sure there would be great interest for such versions too.
Thanks for any advice on this Funtastic! 
