I have 2x LD1 drivers that I want to connect to the same switch in parallel. Can I do that or is it not advisable?
I want to run 2 separate LEDs from the same battery power.
I think it would work, but then again I’m no electronics expert so I really have no idea. Perhaps one of the electronics wizzes can post.
If it worked it would be awesome to connect 3 FET e-switch drivers like this in a 3-cell light with isolated batteries and emitters. With the only connection between the drivers being the switches, you’d have the same multi-cell safety as the Zebralight S6330. The light would be as safe as a single-cell light without any of the typical risks of a multicell light (you could have one cell empty, while another is fully-charged in the same light with no risk, etc.)
It would work, but sooner or later the drivers will get out of sync when one doesn’t properly respond to a click while the other does, etc. You might what to connect both LED’s to the same driver or connect the PWM output from a master driver to a slave driver instead.
What’s your desired end result? Why not just parallel two emitters from the same driver?
Aah yeh, I forgot about the sync. If they ran off separate cells like Firelight2 suggested then it would be simple enough to get them back in sync by removing one cell. Is it easy to set up master/slave drivers? I would need a lot of guidance for that (pics).
Power muahaha. Each led would be regulated so I wouldn’t need to match up led Vin. Wouldn’t 2 leds on one driver be half the power? I realize it’s not half the lumen output but I want it to be a hot mod not a ‘safe one’, so to speak.
Yes, you would split the amperage between the emitters if in parallel. If that’s your intention, I would go with the slave setup too.
Keep in mind the LD’s are still linear drivers, so your batteries will need to supply adequate voltage. You won’t get 5amps x 2drivers from a single 18650. Parallel cells are the way to go.
Cool. 2x 18650 suits me fine. Thanks PD68.
I’ll contact Led4power and see if he can give me instruction on the setup.
Slave setups are super simple on thr other BLF drivers, but I’m envisioning it might be more complicated on the LD’s. We’ll see what LED4Power says, you may have to try your original idea. Theoretically it should work.
Lets hope it’s simple for these too, I’m an electrical simpleton after all 
I didn’t catch what LD stood for in the OP. Yeah, as pd68 said, it will be best to hear what LED4Power says about this. Interested in hearing that and ultimately seeing how this goes.
I got a reply from Led4power -
“LD-1/2 driver don’t have real master/slave feature,but it can be done.
But there is small possibility when you press/release e-switch one driver will change mode,while other would not;this can be easily fixed by dissconecting battery (both drivers reset to deafult state).
Procedure would be to first set both drivers to your default mode (usually the lowest one). After that off-time capacitors on both drivers should be removed from pcb;this way drivers can’t change modes by tailcap switch or by removing/inserting battery. E-switch should be connected to both drivers (just like one driver is connected) and that’s it.”
So I am just waiting to find out which are the off-time capacitors. It is similar to my original idea only this will be easier to sync the drivers should they get out of sync.