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List of Dodgy Crowd Source Funded Projects

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ogden:
Then there's UV air purifier. This one could be closer to truth because actual tests are made (as they say):

https://respiray.com/product/

Cyberdragon:

--- Quote from: ogden on March 27, 2021, 12:32:32 pm ---Single UV led of unknown power to clean 500ml of unfiltered water in 60 seconds. Right :palm: "Get water from sick anywhere (c)"

https://www.kickstarter.com/projects/auronbottle/auron-pure-water

--- End quote ---

Does it say LED? UVC LEDs are expensive and weak, it might be a tiny mecury tube.

mikerj:

--- Quote from: Cyberdragon on March 27, 2021, 03:00:40 pm ---
--- Quote from: ogden on March 27, 2021, 12:32:32 pm ---Single UV led of unknown power to clean 500ml of unfiltered water in 60 seconds. Right :palm: "Get water from sick anywhere (c)"

https://www.kickstarter.com/projects/auronbottle/auron-pure-water

--- End quote ---

Does it say LED? UVC LEDs are expensive and weak, it might be a tiny mecury tube.

--- End quote ---

They state it's an LED in the comments section, I wouldn't have expected anything else for the small size of the battery they must have in in.

thatawesomeguy:
Another water from the air device..

https://www.indiegogo.com/projects/kara-pure-turning-air-into-drinking-water--2/coming_soon

https://karawater.com/

brucehoult:

--- Quote from: thatawesomeguy on May 10, 2021, 12:30:05 pm ---Another water from the air device..

https://www.indiegogo.com/projects/kara-pure-turning-air-into-drinking-water--2/coming_soon

https://karawater.com/

--- End quote ---

Why not? I've had a device at home for many years that is rated to extract I believe 25 litres of water a day from air, though I think that's at 25 C and 80% humidity which I don't have. I think in practice its extracting about 10 litres a day, using 8 kW/h of electricity to do so. I then throw the water away as the purpose is to make the room more comfortable both by reducing the humidity and by pumping out about 800 W of heat from 330 W of electricity.

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