Joule Thief

[tysb3]

ugrade2

[jeanna]

Those are cool videos.

I would like to see a slightly foggy resin rather than the absolutely clear type.

It is a problem with the eyes making the safety decision based on the extreme brightness of the point of the led and the pupil constricts and the result is that even though the led is intensely bright, the room appears darker because your eyes are closed down they way they are in bright sun.
I am still on the hunt for great diffusers.

In following up on some leads from that video I came across a place that sells glass etching compound.
This is the perfect thing..for glass......now to find an equivalent to dip the superbrights into to make them diffused.

I saw on the throwies page there is a link to very expensive leds from china that are diffused.
I got a few from RS back in the days... but since I am looking for a diffuser for superbrights the search continues.

I love the led ice cubes. (I must be some kind of a nut!  )

OK back to the lamp that won't turn off!

jeanna

[guruji]

Gagdet why is it that one cannot connect the Ucap to a heater filament and then you told me to put a copper wire to see glow???
Cannot understand this cause copper wire have much lesser resistance as heater filament.
This guy had used it on an electric kettle.

http://www.youtube.com/watch?v=5RWaCE_SW8w

[innovation_station]

so i was playing around with my special tool ... lol

i think it can be set up as a multi detector ...  lol 

i stumbled upon a way to tune to what ever odd freqs i desire ... strange little thing  looks like it may or could be made to detect electric / sclar feilds ... 

: )

w

basically what im saying is when i went to shoot the video of this effect ...  the thing changed its tune...  i thought it was a loose wire ...  nope ....

i just found the freq ... agin now it does as it did b4 squeels and such when i change its axis  / elevation angle  and things ...

[Pirate88179]

Jeanna:

You can frost glass by etching it, or sandblasting it, or just sanding it...same thing.  So, as far as the LED's go, you can take some sandpaper, I would suggest pretty fine like 800 grit or finer, and lightly sand the plastic on the LEDs and this will frost them.  I have done this a little while back.  It will diffuse but, like any diffuser also cuts back on the light output so, it is another balance/compromise deal.

It may do well to sand the tips with a coarser grit paper and the sides with finer paper.  I will try this to see what that effect might be.  So much of the light comes out of the ends that it might take 600 grit paper or a little lower to get the desired effect.  They sand easily and it only takes a moment or two to get the frosted effect.

This might make a good video so if I can round up what I need, I may do this again and video it.

Bill