UV diode group buy
Conundrum, Tue Sept 25 2018, 08:04AMHi, can anyone think of a use for UV diodes?
have to buy a sensible quantity but at 6E each + 16.95E postage it seems an expensive way to tell if it works.
These are proper tested ones BTW none of that failium (tm) I bought last time.
Apparently peak power is in the 5.5mW range at 350-370nm viewing angle 3 degrees.
Incidentally thanks Stella for the Tb doped sheet, seems to work with alpha particles from 241Am too if you irradiate the photosensitive side.
For some reason this source seems "hotter" than most so I can see the glow (yellow-green) in a darkened room.
I can send them untested or try one out first to see what the performance is like.
These have internal Zeners to prevent static damage as well.
-Andre
Re: UV diode group buy
Signification, Wed Mar 13 2019, 05:01AM
I am very interested in finding aLED's in the UV-spectral "SOLAR BLIND" region, especially as high as 5mW power range. However, I think the range is somewhere like 250nm - 300nm (...not 100% sure). One applications is non line-of-sight optical communications in bright sunlight. I have even seen a "solar blind peak" photomultiplier lately. I have -never- seen mW-level compatable UV LED's! Maybe a lot has happened in the UV-LED technology in the last few years. How expensive are they?
Signification, Wed Mar 13 2019, 05:01AM
I am very interested in finding aLED's in the UV-spectral "SOLAR BLIND" region, especially as high as 5mW power range. However, I think the range is somewhere like 250nm - 300nm (...not 100% sure). One applications is non line-of-sight optical communications in bright sunlight. I have even seen a "solar blind peak" photomultiplier lately. I have -never- seen mW-level compatable UV LED's! Maybe a lot has happened in the UV-LED technology in the last few years. How expensive are they?
Re: UV diode group buy
johnf, Wed Mar 13 2019, 06:02AM
if someone finds a 210nm one let me know
johnf, Wed Mar 13 2019, 06:02AM
if someone finds a 210nm one let me know
Re: UV diode group buy
Sulaiman, Wed Mar 13 2019, 07:33AM
I've wanted useful u.v. leds for decades !
I've settled for low pressure mercury tubes,
lots of light at 184 and 253 nm,
or just 254nm via borosilicate glass.
Sulaiman, Wed Mar 13 2019, 07:33AM
I've wanted useful u.v. leds for decades !
I've settled for low pressure mercury tubes,
lots of light at 184 and 253 nm,
or just 254nm via borosilicate glass.
Re: UV diode group buy
Conundrum, Thu Mar 14 2019, 08:49AM
Should have asked me. I have some very small circular tubes from case lights, thanks to Arcadia Express.
Conundrum, Thu Mar 14 2019, 08:49AM
Should have asked me. I have some very small circular tubes from case lights, thanks to Arcadia Express.
Re: UV diode group buy
Signification, Fri Mar 15 2019, 02:20PM
Just found on ebay LEDs 310, 275, 265nm. From memory 1980's: found a small eprom eraser-matched ROM quartz circle ~254nm. IIRC: from "JKL lighting" not LED
Signification, Fri Mar 15 2019, 02:20PM
Just found on ebay LEDs 310, 275, 265nm. From memory 1980's: found a small eprom eraser-matched ROM quartz circle ~254nm. IIRC: from "JKL lighting" not LED
Re: UV diode group buy
Conundrum, Fri Mar 15 2019, 08:28PM
Good find. I think they are good diodes but not sure without ordering some.
If you get any 265 or 275nm ones let me know, as I have some old EPROMs that need erasing.
EDIT: I have two UV LEDs from my broken nail lamp (don't ask!!) pre-mounted in bottle caps with
approx 45cm flying leads and parallel antistatic resistors.
Estimate power in the 20mW range but still useful.
Confirmed that the varnish still dries with a single diode at close range and I'd picked the least bad ones
from the back edge as they had the best heatsinking.
Anyone have a use?
I can still be contacted on my old Email address.
Would be happy to sell on my encapsulated spares, confirmed they are intact and antistatic protected.
Conundrum, Fri Mar 15 2019, 08:28PM
Good find. I think they are good diodes but not sure without ordering some.
If you get any 265 or 275nm ones let me know, as I have some old EPROMs that need erasing.
EDIT: I have two UV LEDs from my broken nail lamp (don't ask!!) pre-mounted in bottle caps with
approx 45cm flying leads and parallel antistatic resistors.
Estimate power in the 20mW range but still useful.
Confirmed that the varnish still dries with a single diode at close range and I'd picked the least bad ones
from the back edge as they had the best heatsinking.
Anyone have a use?
I can still be contacted on my old Email address.
Would be happy to sell on my encapsulated spares, confirmed they are intact and antistatic protected.
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