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As a workaround for the poor performance on light colored wood, perhaps you could darken the wood first, do your etching, then lightly sand to remove the pre-darkening agent.

Well the idea was to shoot a bunch of light in, then change the properties all of a sudden, such as by rapidly heating it, so that the light all came out at once.

Like plasma mirrors. For a capacitor I was thinking more along the lines of a Bose-Einstein condensate where you can slow the speed of light by a factor of 20 million. Pump in a bunch of high power pulses, then release the other laser beam that is controlling the speed of light through the...

Also, make sure you're not trying to solder the laser diode pins to the input side of the flexdrive. Those holes are spaced farther apart than the ouput side.

Also, you can't set both V and I to what you want running through your laser diode. You can only adjust one at a time and the other will be what the laser diode says it is going to be. Technically, you can only adjust voltage and current is the result, but with constant current drivers it's OK...

First start here: http://en.wikipedia.org/wiki/Lens_(optics)) FL = focal length. Imagine you have a bunch of light rays being emitted from a point and fanning out in a V shape. If you put your lens in front of the fanning out light rays and position it such that the point where the rays...

Digikey, Arrow, Allied, Mouser, Heilind are all electronics suppliers you can find online and I'm sure there are many more. SMD packages can be cheaper or more expensive than their through-hole counterparts, but the difference typically isn't much. Also, components can come in multiple different...

Electronic component distributors. SMD = surface mount = a general package/mounting style for electronic components.

You almost certainly killed it with ESD (electrostatic discharge.) Laser diodes are very susceptible to this, and it probably happened when you disconnected or connected the wires the last time. Also, bench power supplies don't always have the nice, clean output you expect. You could have had a...

If you really want a lot of bandwidth maybe you could invent a laser transistor! Scientists break light modulation speed record--twice I don't know off the top of my head what kind of modulation speed you can get with LCDs, but I don't think it's very fast. Maybe a couple hundred Hz? If you...

It's a boost driver; that's not the current running through the diode. I think it's safe to assume the driver's not all that efficient. If it were 100% efficient and we assume 5V Vf for the diode, then it would be 224 ma through the diode. I could believe 50% efficiency on that driver, which...

Yesterday I was playing with a childrens toy consisting of a glow in the dark sheet and a pen with a UV LED in the tip. I charged it up with the UV and hit it with my green laser, and it did quench the phosphorescence. I don't know if this was due to unfiltered IR, the green, or both, but it...

Re: 12x Murder Fund! (Complete!) Concentrated hydroxides (NaOH, KOH) will also etch glass.

Do projection TVs have such an assortment of optics worth salvaging? Like: Mitsubishi 50" Projector TV $30.00 OBO!

Re: 12x Murder Fund! (Complete!) The GITD tailcap diffuser isn't going to continue glowing for the full "off" minute and cause the sensor to miss the count, is it?

After I manually installed the first update for Avira, it can now successfully update itself. I have no idea what the problem was.

And Tech_Junkie gives me negative rep for that. Real nice. For the most part I don't care about rep, but I'd rather not lose credibility in people's eyes because it's in the negative. For the record, TJ, the only "side" I ever "choose" is my own.

TechJunkie is a troll.

I still think the dot looks a lot more yellow than 635. I guess it's just the picture, as the beam pic looks like 2 red beams.

Is it just me or does the picture of the dots look like it's orange or yellow?