http://liesandstartuppr.blogspot.co.uk/2017/07/ubeam-withdraw-claims-of-wirelessly.html
Do people 'charge' their TVs? It seems a weird turn of phrase for somebody who complains about uBeam's grammar.
Plus, keep in mind you still have to plug a cable/sat receiver (which itself needs power) into the TV which requires a HDMI cable. If you don't have that type of service you'd need to hook the TV to your antenna to receive over the air broadcasts, so that means running a coax cable from the TV.
Any way you look at it you still need wires.
You'd also need to have a pretty large battery pack inside the TV to keep it going during charging interruptions, adding even more cost to the already outrageous price the uBeam would add.
Any way you approach it, it's stupid.
Plus, keep in mind you still have to plug a cable/sat receiver (which itself needs power) into the TV which requires a HDMI cable. If you don't have that type of service you'd need to hook the TV to your antenna to receive over the air broadcasts, so that means running a coax cable from the TV.
Any way you look at it you still need wires.
You'd also need to have a pretty large battery pack inside the TV to keep it going during charging interruptions, adding even more cost to the already outrageous price the uBeam would add.
Any way you approach it, it's stupid.We have this thing called radio these days. It can get information to a display device wirelessly. However silly the ultrasonically powered TV idea might be, needing cables to get signals to it isn't one of its problems.
Do people 'charge' their TVs? It seems a weird turn of phrase for somebody who complains about uBeam's grammar.You never used to charge your phone, either - it had a line for both voice and power.
Do people 'charge' their TVs? It seems a weird turn of phrase for somebody who complains about uBeam's grammar.You never used to charge your phone, either - it had a line for both voice and power.
Yes, but the time we started using the term 'charge' was when phones ran off batteries and needed charging.
People still have fixed landline phones today and nobody says they're being 'charged' by the cables. People will look at you weirdly if you do.
I think this has the potential to drive animals insane, cause depression in pets, effect wildlife, etc.
No matter what the achievable specifications are, this could very well turn your house into a torture chamber for a family pet.
It's rather sadistic.
Anecdotally, my cat (about 12yo) was sitting about six feet away during the tests. He could tell when it was switched on and off as his ears twitched in correlation, but he wasn't otherwise perturbed,
After I'd done 40-60kHz 'tests' with the cat (many pages ago), for weeks afterwards I only had to move my hand towards the SG to get the cat to quickly disappear.
After I'd done 40-60kHz 'tests' with the cat (many pages ago), for weeks afterwards I only had to move my hand towards the SG to get the cat to quickly disappear.
In ancient times I worked in a Philips store and one of the things I had to do was delivering and installing TV's and explaining the functionality. Sometime in the lifecycle of these products they had an ultrasonic remote, and I remember quite well that while demonstrating the remote the cat that lived there decided to bite me in the back of my head because apparently he was very annoyed by the remote.
In addition to the power harvesting problems, the team is also working on how to encrypt messages and stream videos, and adding a low-power E-ink screen for a display.
Someone who has a dual output FG should drive two US transducers a few hundred Hz apart to see/hear if there are positions where the beat frequency is audible.
Someone who has a dual output FG should drive two US transducers a few hundred Hz apart to see/hear if there are positions where the beat frequency is audible.
I was wondering that myself, I have quite a few here, it might make for an imteresting experiment, although I'm not expecting much, even driven hard I don't think I can hit non linearity in air with a couple of transducers.
Someone who has a dual output FG should drive two US transducers a few hundred Hz apart to see/hear if there are positions where the beat frequency is audible.
I was wondering that myself, I have quite a few here, it might make for an imteresting experiment, although I'm not expecting much, even driven hard I don't think I can hit non linearity in air with a couple of transducers.
I don't think you'd need any high power to produce and hear the beat frequency, these things seem very loud in the beam at 4m.
I ran one transducer at 39.8kHz and the other at 40.2kHz, with 65Vpp, 80mA total current draw from the PSU. I used a PIC24 to generate the two frequencies from a pair of output compares both running in half bridge mode, fed into an L293 giving two full H bridges, one for each transducer (MA40S4S). The L293 and the transducers get quite toasty!
Quite a heated discussion on Twitter the other day between the uBeam CEO and a VC.
https://twitter.com/meredithperry/status/889504937163476992
Quite a heated discussion on Twitter the other day between the uBeam CEO and a VC.
https://twitter.com/meredithperry/status/889504937163476992
She knows everyone has jumped ship and the product isn't even close to working how she imagined. She knows the game is over and it's just shuffling deck chairs on the Titanic at this point.
Seems like Matt Ocko deleted all his tweets.
Maybe he was scared he might have upset the VC club?