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it actually depends how wide of an area that 250mw is spread out across. 250mw in a tight beam hitting your eye is going to fry it. but if it's spread out over 100 square cm, then I would guess your eye isn't taking in much more then 2.5mw. (guessing 1 square cm to be somewhere in the...

I've seen various threads on the LEDs from the casio projectors. Anyone know if they work at lower powers as well as the higher power outputs? I'm trying to work out a project for which I need a LED that doesn't look like a bulb shape, preferably with a red color. However high...

Useful to know is that #1 could have a heatsink made that leaves the existing waterproofing intact, Or, by removing the glass inside you could have plenty of extra room to fit in two drivers if you want to parallel wire a couple of microboosts to hit high powers in 445. The glass is inside the...

5mw is safe for visible lasers because the blink reflex kicks in to protect your eyesight. It can still damage the eyes, permanently. It just does it slower then the typical human blink reflex kicks in. With 980, if you can't see it well, or at all, then the blink reflex won't be kicking in...

If the mass at the center of a black hole was shot into another universe, then the mass would no longer be there to exert the gravity to keep it as a black hole..... meaning if you relocate the mass, the black hole would no longer exist. information can not be destroyed, but matter can be...

Although while mass always would have a positive value, there are still tremendous forces at work in our universe yet to be directly experienced or understood. After all nobody knows what "Dark Energy" is, or how it works. All we truly know is there is a force accelerating the expansion of...

I make certain to carry one of these on me every night. just in case someone launches a shoulder mounted surface to air missile at me while I am jogging along.... Hey. I guess laser dazzlers aren't always tuned for human eyesight. though I suspect aiming a 10 watt multi-wavelength laser at...

This made me lol. How does one properly Bastardize a language which is arguable the ultimate bastard language in and of itself. English is a few parts Latin, a few parts old west norse, throw in some french, Norman-french, the old scottish language and a few others. And of course the original...

actually, most death's from black widow bites are caused by allergy. While the venom from all spiders in the genus Latrodectus is extremely toxic (Think nerve agent. Atropine will even counteract some of the effects) They also inject a truly tiny amount of the venom. A small child can die...

When I took the required class for a concealed handgun permit about 10 years ago, I learned a few interesting things. The things they tell you are simple. If you are defending yourself you WILL go to court. Not might, will. The prosecuting attorney will do their job and try to cast you in...

Aesthetics is something purely subjective. As they say beauty is in the eye of the beholder. There will definitely be other hosts. As well as other patterns based off this basic host. The texture on it is done by hand, I tried to settle on something I could reproduce with fair efficiency and...

the blue reflection on the glass is how you tell. That's a red AR coating not a blue one. it's reflecting blue, not transmitting it. It should be yellowish

ok Focusing ring is finished, though I haven't tested it with a full threaded glass lens. I actually cast it around an aixis brass ring. Silver is so soft, the tiny threads wouldn't hold up any better then plastic to repeated focusing. So I figured utilizing the brass lens nut threads...

As for the straight style for sale. I plan on listing them once I feel it is 100% finished. Deciding they need a focusing ring. I've got one prototyped up. Just debating on the length. I cast an aixis nut in place inside the focusing ring so the threads won't wear out. But I'm trying to...

Great review! Got two last little tweaks before I list these for sale. Among which will be adding a focusing ring. That should eliminate the unfinished look at the front. Curious. I haven't tested how well the heatsinking is in the straight small design on this. How long before the host...

Yep. When working with gold, the higher the carat the more pure it is and the easier it is to see that smearing. When you get pits in an gold ring, you "burnish" them. This is either done by hand with a smooth thick ended tool, or with a rotary burnisher in a flex-shaft. Either way the...

Can be cast. Silver works better then gold. I've made a couple silver hosts. (3 total so far) in each piece the entire host then makes up the heatsink. although the smaller lasers it's less of a heatsink. I've also cast up a heatsink for my dorcy in silver. Works well. it does cost more...

Hmm anyone find a location to buy those tiny fans in quantities less then 200?

simple. everything is math. change one of the base constants and it throws off all your calculations based on it. This is one of the more basic measurements being thrown into question. There's an awful lot of math based on things like this. If you change one of the base measurements, then...

A large majority seem to burn a few things once they get their first high power laser. and burn other things when they get a stronger laser. However the burning part gets old after a bit. Shining into the sky looking at the beams is fun. showing off to other people is always fun, but...