Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Recent content by Nutball

  1. Nutball

    How to test if UVC LED is working?

    Thanks. Are there any other chemicals like alcohol or something good for that? There's mold on stuff I might not want to risk bleach on.
  2. Nutball

    How to test if UVC LED is working?

    It's weird lighting up a room with it because a normal 20W "black" light would brightly light up white and fluorescent greens and oranges, but this thing is so bright you hardly notice greens and oranges over everything else being illuminated. Not very purple like 405nm, but has the same blue...
  3. Nutball

    How to test if UVC LED is working?

    I have a 4W glass tube UVC bulb that seemed to bleach red serratia bacteria in a highschool experiment. Obviously I can't see the UVC, but I can see a mix of blue green and purple plasma in the tube. So, what's this 390nm 60W light good for now, any ideas? I'll keep the remote base to use on a...
  4. Nutball

    How to test if UVC LED is working?

    Stupid me didn't read the 390nm in the description. It definitely wasn't purple, but not really a natural blue either, which made me not want to risk a closer look. They have a 254nm glass tube version, only 25W
  5. Nutball

    How to test if UVC LED is working?

    They do look like normal yellow LEDs. I saw an article where someone suspected the same bulb a fake, though they never tested if it had any short wave UV output, they simply bluffed the seller into giving them a datasheet showing it emits in the 300-400nm range or something, maybe 430's. He did...
  6. Nutball

    How to test if UVC LED is working?

    I got a cheap 60W UVC LED for hopefully killing mold under the house, but when I first saw the bulb, I noticed no glass lenses on it (I got the non ozone version). I also noticed when powered on it didn't look like the right color. I did glance at the bulb from about 40ft, and further observed...
  7. Nutball

    Space Discussion Thread

    Yea, but the rocket boosters were not reused. Seems like the guy has nothing better to do with his money than shoot his junk up into space: cars and satellites and such. Although his new truck belongs in space, but that might end up as another embarrassment :LOL:
  8. Nutball

    Space Discussion Thread

    What's the point of all of those satellites? Elon is getting on my nerves with the sum of what he has done. Some of it I like though, like those reusable rockets.
  9. Nutball

    Sanwu RGB review

    Interesting how the intensity of the most head on beams changed their color (increased their saturation I guess). I almost thought you had 3 other lasers lined up behind the diffractor , NOT shining through it, like 405 and 505 and 445.
  10. Nutball

    How to make your way overspec $5 pen focusable + new bonus section added

    I actually found last night that weak green was just an unstable one. I tried using it for longer than a quick flash and saw it flicker bright and dim for 15 seconds until it became a solid medium power. I found that if shut off for a second, then first 1/20th of a second was as bright if not...
  11. Nutball

    How to make your way overspec $5 pen focusable + new bonus section added

    I am curious to know why the power seems to vary so much with these pens. I didn't see a pot on the regulator in Pman's first post towards the bottom, so it probably isn't from slight differences in how it was adjusted. Maybe the design of the regulator is so bad that each one has a different...
  12. Nutball

    Macro pics of <5mW Laser Diode

    It is complete with a switch, battery spring, and resistor for limiting current. So I'll just give it 3x 1.5v batteries like what it took, but I'll use batteries bigger than buttons, but not bigger than AAA
  13. Nutball

    Macro pics of <5mW Laser Diode

    Interesting
  14. Nutball

    Macro pics of <5mW Laser Diode

    I was powering it with a little more than just enough to light it @ 2.1v, hardly enough to form any noticeable unidirectional emission. A little more power, and a huge contrast forms between light going in many directions and the main beam. this one was supposed to run on 4.5v of button...
  15. Nutball

    Macro pics of <5mW Laser Diode

    Sony wx220 looking through either a 50mm 1.7 lens or a 24mm 2.8 which isn't as good (too much magnification which causes distortion)




Top