Recent content by CapeClover

I suspect that any device that reads molecules will raise a tremendous number of false alarms. There are millions of legitimate reasons why any random person on any given day will test positive for molecules that indicate explosives, narcotics, or whatever else they might be looking for.

Once you say "this laser can burn" people get scared. They envision the beam hitting something and bursting into flames and setting the house on fire.

You sure ? I have ordered Lithium Polymer batteries from Chinese dealers several times and each time they were shipped via Hong Kong post and delivered to me by USPS.

Your parents are worried and are looking out for your best interests. They are probably thinking about how they would bear the responsibility should something go wrong. Since you are living under their roof you have to abide by their rules. If they say "no lasers" then it's no lasers. When I...

I think his best bet is to bypass all the tinfoil and other ideas and instead just report directly to the mother ship.

Where are you located ? If you are in the USA the site says they will not ship to the USA due to FDA regs.

Follow the advice given here. The IR lasers are extremely dangerous. The beam is invisible but still powerful and dangerous. Try building other types that operate in the visible part of the spectrum. And, as far as goggles go, yes, you need goggles for any type of laser you build. And the...

Ping pong balls are made of cellulose dinitrate based plastic aka celluloid. celluloid burns ferociously which is one reason it is rarely used these days. Only things made of celluloid these days are ping pong balls, some guitar picks and pick guards, accordions, and very expensive fountain...

Only way you might possibly create a "ufo effect" with small handheld lasers of 1 watt or less is possible shining them on very low dense clouds or maybe on foggy nights. But it's still going to be obvious to most people its just a laser beam. You might manage something with very high powered...

If I am going to carry the laser around with me (which is something I almost never do) then I prefer a round host. If I am going to restrict its use strictly to the lab/workshop bench then some sort of square or rectangular host that can sit squarely in the bench or even be clamped or screwed...

I agree 100%. If a person is truly interested he/she will be willing to take the time and learn how to DIY one. Otherwise they can go to any one of a million Chinese websites online and buy one ready made.

808 nm is infrared. It is invisible to your eyes.

I got interested in Lasers back when I was 14. This was back in the early 1970's so i am up there in the years. At that time I wanted to build a ruby laser and I used to spend my lunch break at the library reading books about lasers, and had a particular interest in one book that described the...

Sadly this is why lawmakers have to restrict lasers. Too many morons treating a scientific instrument as a harmless toy.

Spend the money and get the best goggles you can buy. There is no cheap and easy way out when it comes to safety.