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There are different kinds of safety equipment, something like a filter mask is something you wear because if you don't you will get harmed. Something like a hardhat is a thing you wear even though most of the time nothing is falling on you, but when something does it saves your noggin. Laser...

Electricity will not flow unless you've got a complete circuit, using a metal case as a conductor isn't uncommon in low power electronics. In your diagram if you follow the top connection from the LED you can see that it is directly connected to one of the battery poles, the other side of the...

You can get those hollow rubber balls with tips on them meant for blowing dust of camera lenses, they shouldn't damage the coating, I wouldn't clean them with any solvents, compressed cans of air included because of the volatile chemicals they use to drive the gas, there are lots of optical...

That is ridiculously cool. I want one. Ain't no way I could justify spending the money it would cost though.

I don't see a poll, I think you may have forrgot it :p

If a pair of glasses has multiple ranges, it will either have a specific rating for each range or if it only has one it will be a minimum across the entirety of both ranges, so if the glasses just say OD4 then that is the minimum level of protection they provide. They may still have higher...

If the framerate is noticably choppy that's all I was looking for :) I'll hold off for now until I can free up the one I have.

Yea but you're not a kid. My first laser was also a tiny little thing that was bought at a faire/market thing, I don't know how old I was at the time but I do know that for some bizare reason at the time it seemed like a good idea to find out if I could look directly into it, luckily it was a...

No, they don't exist. if you lowered the intensity of all wavelengths of light that would be like wearing glasses that are very very nearly solid black, you would have almost 0 visible light make it through and you would effectively be blind. You can however get 2 pairs that between them will...

I found his videos a while ago, and I've been wanting to build one since, but my raspberry pi is currently in use for adifferent project so I put it on the backburner. I hadn't considered getting one of the pi zero boards, I was worried it would struggle with camera framerate, as I plan to use...

In theory maybe, but that kind of VR technology is veeery expensive for use as safety equipment when the glasses are an option, and you'll be at the mercy of battery life and you'll have a significant amount of weight hanging off the front of your face. I'm sure they have very impressive latency...

RGB is definitely the most exciting, the poll was multi option, so I also voted for lightsabers and drivers, but RGB is definitely a good bit ahead of the other two.

All the lasers are missing units on the output and wavelength. I assume it's mW and nm, but it's something that shouldn't be left out.

I am aware of how light works, when I mentioned power/heat i meant the waste heat generated by the electronics for a given light output

Well I can only give my own reason for being interested, which is that an 808nm laser would be more powerful for the same amount of power/heat generation because it doesn't have the losses in the wavelength conversion steps. That is at least my assumption if I've understood the physics...

The normal 532 green lasers that you can get very cheaply are all DPSS lasers, right? So they have a 808nm laser as the actual source and then modulate the light with two crystals. But there doesn't seem to be any 808 lasers available in a price range anywhere near the cheap green ones, which...

Either small like the Sanwu pocket, or large like the Sanwu striker. Although I don't particularly like the look of most of sanwu's lasers, I prefer the anodized black exterior ranther than the polished aliminum, but those two sizes are ideal in my opinion.