310nm UV Driver Help

Flashlight Modding and DIY Parts
1

I got a C12 flashlight that comes in 365nm uv. I want to use a 310nm light. What kind of driver would I need?

2

Depends on the specifications of the LED, what’s the voltage and maximum current? Most (all?) sub-365nm LEDs have higher voltage than “regular” LEDs

3

The one I’m looking at is Vf 5.5 and 20mA

4

What kind of objects/substances would fluoresce in visible range better when illuminated by 310 nm light then by 365 mm?

5

Thanks for joining the gang, RiseWithMoon!

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6

310nm is right in the range of UV-B, it can be useful for mineral collectors as some minerals fluoresce only under UV-B (MW), while others are fluorescent only under UV-C (SW) and others under UV-A (LW), or a combination of them.

I have some mineral samples myself, where some parts are fluorescent to 365nm UV-A, and others only under UV-C. I have yet to acquire a UV-B light.

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7

@gravelmonkey points to a supplier of gem identification lights - one of them with 3 ranges under one hood in this thread. They seem a bit expensive though.

8

I think if I get any more UV flashlights (that aren’t UV-A), I will have them made by Sakowuf. His pricing is reasonable and the emitters he uses are incredibly powerful, unlike most.

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9

Would you have a link?

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Sakowuf_Solutions on reddit. You’ll have to send a message

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11

I tried to stalk on Reddit but wasn’t successful, do they make sub-365nm lights? You say they use “incredibly powerful emitters”, which?

12

I think the UV-B and UV-C lights don’t get as much publicity because of the danger.

Multi-die arrays made by Yingfeng. Not that powerful compared to a blue-pumped LED but consider how inefficient UV LEDs get with wavelengths shorter than 365nm.

13

I was looking to use this light:

14

Following this thread. I too would like to see how to make these.

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15

Or if I could get an example that’s comparable it would be appreciated

16

@RiseWithMoon
@mcjtom
@fractalprism
@YBF650

Use this driver and stack a R080 on the R330 (IDK what size your host takes, these are 17mm):

Use LED part number HYE35P45F310AG-D1 from the below link:

Also you need to source ZWB3 glass. Here’s a good supplier (I think C series lights are usually 42mm):
https://www.aliexpress.com/store/1101296725/pages/all-items.html?productGroupId=517273029&spm=a2g0o.store_pc_home.pcShopHead_9904563.1_4_2&storeId=1101296725&sortType=bestmatch_sort&shop_sortType=bestmatch_sort

Feel free to ask questions!

3 Thanks
17

THANK YOU! I very much appreciate your time and response. I’m gonna go check it all out now :grin:

18

you need 40Ma driver, all those linked are above 150ma, it is too much for the led. 365nm led in your light is 3-4v led, greater than 1w, 350+ma led, so any linear driver with 1amc chip will work, however your 310nm led is 5-8v led 2-4mW (as in milliwatts) . never mind that pretty much any driver available for flashlights wil fry it, the led is very weak, what exactly are your plans for it?

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To find fluorescent rocks

20

you might want to look for something stronger than 40 milliwatts then.

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