adamsmith143Sep 2022Recommends
You've obviously never heard of styropyro who builds insanely strong lasers with basically salvaged junk electronics. ▶ this video
in “Neutralisation of cockroaches with laser automated by machine vision” · View on HN
Dangerous tattoo remover from eBay is a MILLION watt laser
Dangerous tattoo remover from eBay is a MILLION watt laser on HackerTube: recommended by 1 Hacker News commenter across 1 month, 2020–2022.
styropyro
Open on YouTubedemo · evergreen
Styropyro tests an eBay laser tattoo removal device and finds it is a roughly million-watt pulsed laser, powerful enough to ignite air in the beam. He had bought it hoping to salvage an Nd:YAG laser cavity.
Why Hacker News recommends it
HN mostly cites it as an example of the absurdly powerful lasers sold cheaply online, and a nod to the channel's DIY laser builds.
- people recommended it
- 1
- separate months
- 1
- strong recommendations
- 0
- discussed on HN
- 2020–2022
“builds insanely strong lasers with basically salvaged junk electronics.”
What HN commenters said
4 Hacker News comments link this video. Each one links back to its thread.
darkenFeb 2020Cites it
Tattoo removal tends to use ~1MW pulsed lasers (yes, megawatt). The pulse is extremely short (nanoseconds), but at that power/instant-brightness it's enough to fry sensitive imaging electronics. Can also do fun things like blast holes through CDs. I'd learned about the topic the other day here ("plays" with a cheap tattoo removal kit off the web): ▶ this video
in “Tip: Don't record laser tattoo removal (2019)” · View on HN
ben_wFeb 2020Critical
More worryingly, it’s possible to buy pre-built laser etchers online that don’t come with safety glass: [link] And Q-switched pulse lasers for hair removal (i.e. to be aimed at your face) whose included safety goggles are more than a little suspicious: ▶ this video
in “Lasersaur – open-source laser cutter” · View on HN
scottlocklinJan 2020Joke
Dunno man you can buy some really wack lasers off of ebay: ▶ this video They were talking about this kind of particle accelerator in the 90s back when I used to hang out with accelerator physicists. Though back then it was going to be terahertz waves rather than lasers. Still got to power it with something. IMO best mad scientist weapon is something like this: [link]
in “Particle accelerator fits on the head of a pin” · View on HN
Topics & tags
Electronics & circuit designEveryday physics & science demoslasersnd:yagtattoo removalelectronicslaser safety