this post was submitted on 05 Dec 2023
154 points (88.1% liked)

Technology

59091 readers
4457 users here now

This is a most excellent place for technology news and articles.

Our Rules

  1. Follow the lemmy.world rules.
  2. Only tech related content.
  3. Be excellent to each another!
  4. Mod approved content bots can post up to 10 articles per day.
  5. Threads asking for personal tech support may be deleted.
  6. Politics threads may be removed.
  7. No memes allowed as posts, OK to post as comments.
  8. Only approved bots from the list below, to ask if your bot can be added please contact us.
  9. Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 1 year ago
MODERATORS
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
154
Researcher has developed, at a cost of less than one dollar, a wireless light switch that runs without batteries, can be installed anywhere on a wall and could reduce the cost of wiring a house by ... (www.ualberta.ca)
submitted 11 months ago by [email protected] to c/[email protected]
59 comments fedilink hide all child comments
 

Researcher has developed, at a cost of less than one dollar, a wireless light switch that runs without batteries, can be installed anywhere on a wall and could reduce the cost of wiring a house by ...::A U of A engineering researcher has developed a wireless light switch that could reduce the cost of wiring a house by as much as 50 per cent.

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 14 points 11 months ago (1 children)

Last time i saw a product claiming to run on energy harvested from radio-waves, it was a kickstarter project that (surprise surprise) turned out to be a complete scam.

[–] [email protected] 7 points 11 months ago (1 children)

It is totally possible to harvest energy from radio waves, it's just such a tiny amount that you could barely light a LED

[–] [email protected] 1 points 11 months ago* (last edited 11 months ago) (1 children)

Yeah that's my point, the energy you can actually harvest is ridiculously small. Even if it was slowly charging a capacitor with this harvested power and saving it for later use, how often can i use the switch before depleting the energy faster than it charges? "oh sorry, you'll have to wait 5min to turn on your lights again, It's not quite charged enough"

[–] [email protected] 1 points 11 months ago

My guess is you would get a couple seconds of light before needing several hours to charge it up again.