I’d prefer 2 mode, High, Medium, no memory, start on high.
or any other arrangement is ok, as long as it starts on high or has memory.
Does such a beast exist?
US seller would be great, given the CNY holiday and all….
I’d prefer 2 mode, High, Medium, no memory, start on high.
or any other arrangement is ok, as long as it starts on high or has memory.
Does such a beast exist?
US seller would be great, given the CNY holiday and all….
I’ve been looking for a multi cell, multi mode(no strobe) driver for 3 years and have only found the 5-15V 3- mode(19 mm), the Sharkbuck with remora, the Taskled bflex, and Taskled Lflex. That search is what led me from CPF to here and prompted this thread. It’s long and tedious but the results were positive in the end. I haven’t put one in a light yet because I’m reluctant to do so without proper cell monitoring.
this is almost exactly what I need.
the current is a little higher than i’d like, but I’ll use small wires and test current at emitter.
unfortunately, I can’t find a US seller.
led driver search that maybe helpful.
thanks, I always check there first. I’ve got a few drivers here that need testing so that I can send the info to Ian to be included in the database.
Fast tech is very quick outside the holiday season. 7-10 days from order to receipt is not uncommon but at this moment it might be double that from Cny.
Just for the record, that FastTech driver says it is a Buck driver. This means it’s not really 3 to 8.4 V, it’s
Emitter Vf (plus a little more) to 8.4V
In other words, it can’t boost up the voltage when the battery falls below the emitter Vf - it can only buck off excess voltage when the battery is too high for emitter Vf. Below that Vf voltage, the regulator will stop regulating (it will essentially be DD) and the light will start to dim.
PPtk
P.S. if you want ‘true’ 3 to X volts operation, you’ll need a Buck-Boost driver.
I have this same driver and just recently was able to install it in my UniqueFire V2 and finally have decent operation. Current output from 2 cells is appropriate (~1.5A, I don't have the exact number) for a single XM-L light. It wasn't a perfect fit for my light since it was a couple of mm too small, but I was able to fill the gap using desoldering braid/solder and it it worked just fine. Mode memory is great, no more having to cycle through medium and low every time like my old next-mode-memory driver. The mode group configuration works exactly as described on the FastTech page; turn to low and wait for a single blink and immediately cycle the power to switch to the 5-mode group with strobes. I keep it on the 3-mode group (of course). A light like this only needs high mode anyway since low on a dedicated thrower is pretty pointless.
Thanks, pptk. You’re absolutely right - but I haven’t found a buck/boost w/ enough current (well, i found one but it is too big and has too much current…). Hopefully the recent driver development here will eventually (also) produce something with more power than the current 1A version.
The Vf issue you mention with a single cell is a problem, especially since I’ll be using an XR-E. The light is actually unlikely to be used often with a single cell, but I want to maintain the capability, since the host has that flexibility (7g5v2).
Yes, it’d be cool to have a high only with hidden low mode (for emergency extended use).
thanks for the feedback on the driver.
if anyone has one they’d like to sell, I’m ready to buy
If not, i’ll order from fasttech. I just hate to wait a month to finish this light…it is for someone else…