More Wireless Phone Charging BULLSHIT! - AirVolt - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 18, 2017, 04:11:55 am
content: Dave calls bullshit on the AirVolt, 9m wireless phone charger on Indiegogohttps://www.indiegogo.com/projects/airvolt-charging-smartphones-from-radio-waves-charger--3#/

author: Marco
author_rank: Super Contributor
timestamp: June 18, 2017, 05:00:53 am
content: Quote from: X on June 18, 2017, 04:40:25 amThe more realistic suggestions, like that Disney ones, just use huge emitters in a closed system (the system as a whole is not a RF emitter). Lots of energy sloshing around in a room, most of it just bringing efficiency down to single digits, but at semi-acceptable field strength.

author: coppice
author_rank: Super Contributor
timestamp: June 18, 2017, 05:23:10 am
content: Its nice to see their development timescale allow plenty of time for RF approvals work. You wouldn't miss out that step on a product actually claiming to push out multiple watts of RF, would you? Would you?

author: EEVblog
author_rank: Unknown
timestamp: June 18, 2017, 06:15:29 am
content: Quote from: coppice on June 18, 2017, 05:23:10 amThey couldn't afford EMI testing anyway with their $2k target

author: CeD
author_rank: Contributor
timestamp: June 18, 2017, 12:03:57 pm
content: I can't believe Farnell/Element14 did waste some precious blog space ON THEIR OFFICIAL BLOG to tell people about that craphttps://www.element14.com/community/groups/power-management/blog/2017/06/12/airvolt-boasts-first-wireless-smartphone-charger-w-9-meter-distanceSo many REAL hobbyist projects would deserve such a blog post... yet they decide to go for the complete BS "concept".Oh by the way, i've got a nice Space-Time continuum distortion propulsion concept, I shall open an indiegogo.

author: strangersound
author_rank: Regular Contributor
timestamp: June 18, 2017, 02:03:55 pm
content: This seems like a good place for this...I reckon it's more viable than the Airvolt thing. My buddy and I were working on a house rewire and on the way right before we got to the house (out in the country), we'd pass under a set of high power transmission lines. One day my buddy said, "Hey man, when we get about a block away from those power lines, get your AC voltage detector and turn it on." Sure enough, a block away from them, they set of my AC detector. So I saw this video I posted above a few days before you posted this video and it was the first thing I thought of when I saw your video link.

author: Dajgoro
author_rank: Frequent Contributor
timestamp: June 18, 2017, 05:24:19 pm
content: I happen to be in the same are as this thing is, I'll see if I can find out more info about this.

author: Fungus
author_rank: Super Contributor
timestamp: June 18, 2017, 06:01:10 pm
content: Quote from: strangersound on June 18, 2017, 02:03:55 pmYou can actually light your house for free if you live right under a power line. Just put lots of fluorescent tubes around the place.(free as in "electricity bill", not as in "thermodynamics", obviously)Will it work for charging phones? Sure! All you need to do is persuade them to put a pylon in your garden and you're golden!

author: f4eru
author_rank: Super Contributor
timestamp: June 18, 2017, 10:24:33 pm
content: Wow, that good old Kreosan has good knowledge !Using a spark plug as an high voltage "oscillator" for a DC-DC converter is a gorgeous idea !It unfortunately makes it a very wide band transmitter also -> not practical.If filtered properly on the input, and the whole DC-DC put in a shielded box, that could even pass certification.But wideband filters with high voltage capability, that's not an easy beast to build.He also forgot to put a diode bridge on the transformer output .....

author: EEVblog
author_rank: Unknown
timestamp: June 18, 2017, 11:08:58 pm
content: Quote from: CeD on June 18, 2017, 12:03:57 pm

author: ElektronikLabor
author_rank: Regular Contributor
timestamp: June 19, 2017, 11:43:04 am
content: On the image below one can clearly see, that the device doesn't turn on when plugged into the wall but when the guy press the button on the top.

author: Brumby
author_rank: Unknown
timestamp: June 19, 2017, 12:12:01 pm
content: Quote from: medvedev on June 19, 2017, 11:43:04 amOf course!There isn't a product at the moment - it's only at the concept stage. That would simply be a mock-up to illustrate to the average punter how the thing isintendedto work.We need to stop criticising the mock ups ... it just makes us appear like an unruly crowd at best - and a lynch mob at worst.Let's stick to the fundamental physics that are offered as the principle of operation. That's enough to write it off as a pipe dream.

author: ElektronikLabor
author_rank: Regular Contributor
timestamp: June 19, 2017, 01:13:59 pm
content: Quote from: Brumby on June 19, 2017, 12:12:01 pmI work in R&D department and sometimes we also make mock-ups to demonstrate products or to test things. But our mock-ups never pretend to do something what they actually can't.I'm pretty sure, that the most backers don't know that the video shows just a concept. If AirVolt will ever be able to deliver a product, I think it will be much more bulky; especially the receiver will be much bigger and it will only be able to charge the phone at small distances.So the purpose of that mock-up is not to show the potential backers the concept, but todeludethem. A lot of mock-ups at indiegogo are misleading.

author: EEVblog
author_rank: Unknown
timestamp: June 19, 2017, 01:55:11 pm
content: Newark/Element 14 just dug themselves a nice hole by comparing the AirVolt to the Disney cavity resonance system

author: Dajgoro
author_rank: Frequent Contributor
timestamp: June 19, 2017, 04:13:02 pm
content: They do not seem to appear anywhere in the local Zagreb startup scene, which is rather small, and nobody seems to had heard of them.I think its just a bunch of guys doing the operation in secret.

author: Fungus
author_rank: Super Contributor
timestamp: June 19, 2017, 05:06:41 pm
content: Quote from: medvedev on June 19, 2017, 01:13:59 pmThis. Everything in that video makes it look like a working product.

author: nctnico
author_rank: Super Contributor
timestamp: June 19, 2017, 10:34:15 pm
content: Quote from: coppice on June 18, 2017, 05:23:10 amIt is a magnetic field and not an electric field. Still regulations and emission limits apply so there is a limit to how much energy you can transfer.

author: Fungus
author_rank: Super Contributor
timestamp: June 20, 2017, 12:03:30 am
content: Quote from: nctnico on June 19, 2017, 10:34:15 pmUmmm... no it isn't.

author: Fungus
author_rank: Super Contributor
timestamp: June 20, 2017, 12:06:22 am
content: The campaign goal is stupidly low ($2000)I bet their real plan is for a particularly stupid VC investor to notice them thanks to this campaign.After that they can go all uBeam.

author: Dajgoro
author_rank: Frequent Contributor
timestamp: June 20, 2017, 12:58:14 am
content: Quote from: Fungus on June 20, 2017, 12:06:22 amI think they just were trying to do a money grab.2000$ is not such a small sum here, making such an scam might even be worth it.

author: cj
author_rank: Contributor
timestamp: June 20, 2017, 05:48:49 am
content: This video has a lot of AirVoltIt's capable of transferring appreciable power over a few meters there’s only the smallproblem of shrinking the device so it will fit that small box.CJ

author: Fungus
author_rank: Super Contributor
timestamp: June 20, 2017, 08:36:16 am
content: Quote from: cj on June 20, 2017, 05:48:49 amCharge your phone in seconds instead of hours!

author: nctnico
author_rank: Super Contributor
timestamp: June 20, 2017, 09:23:21 am
content: Quote from: Fungus on June 20, 2017, 12:03:30 amAnd you believe all marketing crap?

author: mikerj
author_rank: Super Contributor
timestamp: June 21, 2017, 09:13:44 pm
content: Quote from: nctnico on June 20, 2017, 09:23:21 amHow can their marketing department be lying about about the operating principle of a device that doesn't exist and almost certainly never will exist?