Thank you very much Jason for explaining that so clearly for me. 
I wanted to order some in the past, but its confusing what size and resistance range to order.
Three SMD 0603 resistors will come included, but not installed (4.7K, 19.1K & 36K).
I will try again.
If you wanted, that driver could likely be flashed with Anduril, in which case you could probably get one of pins 5/6/7 for the switch LED (likely one controls the FET and the others are unused). But that would take a bit of doing…
I was looking through the details of that driver and I noticed Richard does not recommend the zener mod in a 2s design.
“Not recommended for use with the Zener Mod option. For 2S+ cell momentary use, check out the LDO 20mm driver instead.”
What are the best resources on building a Convoy? I’ve seen a couple videos.
Can I build a Convoy S21B quad, which requires a 20 mm MCPCB and 22 mm driver?
What would be a good driver, board, and optic?
What sizes of LED would such an optic limit me to?
Lumileds Luxeon are reportedly very efficient. Opinions on this brand?
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Yep you are correct. :+1:
I looked at the reason and he said the parasitic drain was bad on this driver and a momentary switch used with batteries left in the light would drain the batteries quickly. I thought it will work, and the tail cap switch should control the parasitic drain. The reason for trying to get the lighted momentary switch hooked up, is to know the light is powered up. When not in use, just make sure the momentary switch light is off by clicking off at the tail cap. I may have overlooked something here because electronics are still a very weak area for me, so let me know. :question:
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I wanted to use the LDO 20mm driver at first, but they were out of stock.
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I do have a backup driver that uses just the tail cap switch if needed.
https://asflashlights.com/-diy-parts/75-10-amp-capable-17mm-led-driver.html
The UV leds can’t take much power so don’t mess with those.
What led does the S2 have?
im selling something i bought on amazon in a second hand market, the buyer is asking for the gift receipt. is there anything i should be concerned about? like is there anything they can do with the gift receipt that can be linked back to me in a negative way?
You may get some thicker PCB and file them down to the desired thickness.
It’s a bit painful with copper, so for people who have them I’d recommend some Virence / Led4Power alu PCBs. These are hard to get nowadays though…
It never produced much heat so I figured it wasn’t being worked hard.
According to the description on Banggood:
- LG UV365nm LED 5W lamp beads are used.
- The built-in drive is 7135x5 single file.
As far as I know, about the best they can do is attempt to return it to amazon for the original purchase price.
That said - in the secondhand market, if people want weird things, I usually just consider that it’s either too much trouble, they’re up to something, or both. Hopefully for you it’s an option to just move on to a less suspicious buyer.
Sorry, I thought you were saying you had two different lights.
Appreciate you trying to help. I have three in total: the S2 UV, an S2+ with 7135*8 driver and T6-4C XML2, and an S2+ with (if memory serves) a 7135*6 driver and a U2-1A XML2.
Xml2 leds can handle up to about 8A. So you can swap the driver on them for sure.
The UV leds are not robust at all. They can not handle high amperage. So I would not swap their driver.
Maybe somebody that knows what specific LED is used can give us some numbers as to how much power it can handle. My guess is no more than 2A.
I’m not sure on the current handling, but if you search around BLF some you’ll find that all the UV LEDs can’t handle much heat, either. Even treated nicely they don’t have great runtime ratings. You can probably run them at 3A briefly and get lots of power - but, at least for all the examples I’ve looked at, you’re also going to need a 2 cells+buck driver or one cell and a boost driver to hit much current on them - the forward voltage starts high and ascends rapidly.
Wouls someone please tell me how to post an animated gif for one’s avater? Doh
I’m going to guess that you first need an animated gif that is no larger than 85 by 85 pixels. Then try to upload it in your account settings.
Yes, and your avatar must also be under 30 kilobytes.
Thanks to Jason and Scallywag for their input on UV LEDs (I left it as is).
I just recieved an Emisar D4v2 with 3500k E21A emitters, I was wondering if it’s “normal” for them to immediately turn blue on turbo with a high drain battery?
I’m assuming that it has the Noctigon driver which delivers 5A on turbo.
No, that is definitely not normal. I wonder if your driver wasn’t correctly flashed with the NoFET firmware.