this post was submitted on 21 Aug 2023
48 points (100.0% liked)

flashlight

2946 readers
2 users here now

Portable illumination

Rules:

  1. Be excellent to each other
  2. Don't be the reason we need to make more rules

Related:

founded 1 year ago
MODERATORS
 

About using ultraviolet LEDs instead of fluorescent tubes in a bug zapper. PWM'ing them saves power and catches more bugs. I figured it could be of interest here.

you are viewing a single comment's thread
view the rest of the comments
[โ€“] [email protected] 5 points 1 year ago (1 children)

Super cool, thanks!

Tldr for others: a 0.9W UV LED pulsed with PWM at 50% duty cycle, 64Hz frequency performed the best. Even better than a reference lamp running constantly at a greater total power.

Efficacy was further increased with the use of a wide-angle lens on the LED, too.

[โ€“] [email protected] 3 points 1 year ago

And what is the opposite of that magic? Instead of luring them and catching I would love to let them be gone. Or does it not work that way?