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The executive overview: Some diodes have three inputs: positive, negative, and modulation. Modulation controls the brightness of the laser. Lazeerer is using a diode that can be modulated, and a driver that takes advantage of this feature. Knowing how to make a driver for your diodes is the...

Ohhh.. but it can be found in any two-bit dictionary and even in the unenpeachable wiki, plus it appears in my posts, which makes it correct by definition.

Now you're just picking nits. Irregardless of which geometry you were referring to it still applies equally well when applied to lasers as it does when applied to the sun.

He is saying that multimode diodes may not have even distributions if you spread out the light a lot. The dot might end up looking a bit like this: .._______ /________\ ../_____\ I don't think the distinction between multi mode and single mode will matter much to you. I'm no knight, cyper...

Well yes and no. Cyper has a valid point when he says that the sun cannot be focused into a single point. If it could we would see it as a single point in the sky since our eyes focus everything into as small a point as possible. However, cyper was also trying to claim that if you didn't look...

Cyparagon, your conjecture about trigonometry does not apply to the eye. Your conjecture applies to lenses that project onto a flat screen. The back of the eye is spherical, which corrects for any rays of light that may enter the eye at an oblique angle. Additionally, even if the above was...

Survival Laser Home is a US based company that has a good track record.

Remember, that is advice for a controlled environment. At 500mw a reflection off of any shiny surface can cause damage, and it only takes an instant. This includes windows, a glossy upc label, a watch, and any of hundreds of different things that can accidentally be in an uncontrolled...

Thank you for stepping in bee. The price may go down in the future. For the moment the one listed is the only one I have ready. Until I can upgrade my production process in some way or get more free time I couldn't possibly make more than one of these a week. Consider this a pre-release if you...

You're being obtuse. 1/2 degree of arc is well within the margin for error, especially considering that I rounded down for all my calculations for intensity of the sun. All it takes is for you to step out of your cave on a sunny day, cyper. Less than one second is long enough to burn.

Actually, we are talking about the maximum potential for eye damage that could be caused by the sun. In every-day life there are times in which a person will walk from a dark area into bright sunlight. In that situation 6mm diameter is conservative. Some people's pupils can be 8mm in diameter...

If you like the idea, but want a cheaper version there are already cheaper laser gloves out there. Be prepared for red lasers that you can hardly see, gloves that fall apart in a matter of weeks, and lasers mounted in awkward places though. That's what you get from a cheap product: something...

Hmm.. your math is correct, but I think there is a flaw in the logic behind it: Your eyes focus incoming rays of light into points. Therefor, when your eyes are focused to infinity it causes every bit of that 25mm2 "beam" of sunlight to be focused into a single spot on the back of your eye...

Brightness of the sun at sea level: 1020W/square meter diameter of eye: 25mm2 1,000,000mm2 per m2 Therefor: The power of sunlight at sea level to burn your eye is the equivalent of a 25.5mw laser. There are several types of light burn that can be induced by any bright light source. Spots in...

I wonder if anyone has ever actually purchased one, or if they just put the page up to make people talk. After all, no such thing as bad PR and all that. I think I might purchase one just to be the only one who owns one.. right after my blinker fluid comes in the mail.

It is amazingly difficult to do these any justice in text! I've made a new video that shows them off a little bit.

Yeah, I've seen those Omnisistem gloves. I don't really consider them a competitor. The lasers sit on the back of the fingers, which gives you almost no dexterity. They are made from 99 cent cutoff finger motorcycle gloves, and other cheap parts. Every review I have read of them says "I wish...

IR lasers are more dangerous than visible lasers because you can cause damage without realizing it. It is very true that the more you disperse the beam the less dangerous it is. Different people have different ideas as to what power it actually becomes dangerous. When you are working with 5mw...

Wow, I'm just a couple of hours away and I haven't had any problems apart from my firewood getting wet. Sorry about your stuff. Looks like the mosquitos will be extra bad this summer during OCF.

Some of you probably recall my laser glove project that I started a few months ago. Well I finally have a set of green laser gloves that is good enough to sell, and I've listed them on etsy! Take a look. BTW, for anyone reading this thread later: this was originally a link to my etsy listing...