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so I got a 5mw 650nm + 10 red laser, think this will burn through anything? I got it for like 3 dollars, well made too

couple questions, I have goggles that will work for the laser I'm getting. But what will happen if I don't have goggles on while using a 2w laser (I know to always where the goggles), Like obviously not point it in my eyes but way from me, would it still damage my eyes? And what about a welding...

I have a new idea for a even more powerful laser, a lot of the problem with the bigger lasers is the heat they produce. I think I've found a way to reduce the need for a heat sink. I found that there are dielectric liquids for removing heat from electrical devices. you completely submerge the...

So basically I've had lasers, I can solder, I can build electronics.. but I want to take it to a new level and build a 2w blue laser burner. (or 1w/1.5w, but would prefer 2w). Are there any tutorials here, or on the web somewhere that can show me how to do this, I'm looking for a minimal cost...