Many, if not most, jobs from a couple hundred years ago are fully automated now. You'd think that would mean we could stop charging for living, but due to the nature of capitalism and continued physical development we will continue to pay for things. This is the cost of being at the bleeding edge.
Minecraft $26.95. Thousands of hours of gameplay.
Ear Fun Free Pro 3 $50 wireless earbuds. Great sound, quick pairing, good noise cancelling, in-app equalizer, great price. Probably buy direct from them, bought from Woot! Amazon once and didn't get a very good model.
Web Video Caster $5. I stream tons of content and this lets me connect to just about anything. You can use it for free with ads.
Cloudflare domain ~$10/year. Cheapest domain prices and cloudflare works great for everything for me.
Harmonica $5. I just keep it in my bag and use it whenever I'm outside alone, keeps me off the phone.
Fidget spinner $1. The lighter the better imo.
Also my mouse, battery pack, and I love those lazy cell phone holders ~$10 you can put around your neck.
During a hackathon 7 years ago, a team and I set out to make a decentralized blockchain messaging platform over Bluetooth Low Energy. It was intended for situations when the internet was out. We didn't finish the technicals in 24hr, but it was a fun challenge. I looked it up and there are a lot of solutions now, here is the top one on search: https://github.com/permissionlesstech/bitchat
that wavelength penetrates the skin. you need to be around 222nm for human safety
uviquity has prototypes of a 220nm solid state chip they’ll commercialize next year (we’re an investor). a single far-uvc photon will destroy the covid virus.
The current state of the art UVC (short wave, e.g. 255nm) LEDs have very low efficiency, compared to UVA (long wave, e.g. 365nm). How efficient are these 220nm solid state chips?
Do they emit other frequencies, or are they monochromatic?
The uviquity 220 nm SHG chips are super cool--they're perfectly monochromatic (though maybe with some blue light leakage) and I hear from their tech lead that they expect to get up to 10% WPE. I think that approach is definitely going to be relevant much sooner than far-UVC LEDs, but they're still early days, it's going to be a long road. Krypton-chloride excimer lamps are more or less the only game in town for commercial far-UV, at least for now.
This review paper is from 2019, but it includes a good summary of basically everyone who's relevant to the field https://www.nature.com/articles/s41566-019-0359-9 The author used to keep an updated figure on his website but sadly it seems to be down, or have moved
SilannaUV has 230nm, 235nm and 250nm wavelengths, as far as I know the only supplier that does so https://silannauv.com/
I would be pretty careful with all of these wavelengths though. None of them are truly monochromatic far-UV. Use eye/skin protection when messing with them.
Pretty sure that's a UVB flashlight. There's absolutely no way that anyone is selling 255nm UVC that outputs much of anything for more than a few hours for $45.
A good 280nm chip is ~$100 (https://www.ledsupply.com/leds/uv-c-280nm-nichia-ncsu334a-le...), and it gets exponentially harder to produce shorter wavelengths the further down the spectrum you go. 270nm and 265nm chips are getting there, but 255nm is mostly a research area right now.
Merry Christmas to you too! I'll be adding a plugin extension to Large World Coordinates in Unreal Engine inspired by Constructive Reals. It should let me use arbitrary precision, meaning I can make objects excessively small or large at distances excessively large or small in the engine.
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