I think we should also look at the financial side of charging/powering devices. Some numbers about recharging your gadgets via the standard SMPSU based on the average price for power in Germany (EUR 0.30 per kWh) which is quite expensive. The yearly cost for recharging daily:
- smartphone EUR 1 - 1.50
- tablet EUR 4
- laptop EUR 10
Any wireless charging solution has to compete with those numbers. A few bucks more for the convenience of not dealing with a cable might be acceptable. But anything much less efficient or much more expensive is a show stopper.
On a large scale and for a business there does need to be a compelling case that the cost of inefficient charging does allow a valuable function to be performed or saves other expensive functions like labour. For individuals it's a matter of convenience and people will pay for that - I can guarantee you 99% of people have no idea what it costs in a year to charge your phone every day. So if you ask it like this "Imagine you never have to plug in your phone, ever, and it just keeps being powered up. What would you pay every year for that convenience?" and then say "$1, $10, $100, $1000". Basically everyone will say yes to $1 and $10, I think a majority (but not large majority) will say yes at $100, and basically no-one will say yes at $1000. So that says that with a yearly charge cost of say $1 at 100% efficiency, you need to keep real world efficiency at >1%, or ideally >10% (very hard to do but you can get marketing covering for that). So while you are correct, I actually don't think this is the primary show stopper (the massive inefficiency meaning 500 million people block doing this every day adds around 200 PWh to the yearly power demand, not very green).
I think we should also look at the financial side of charging/powering devices.
I think we should also look at the financial side of charging/powering devices. Some numbers about recharging your gadgets via the standard SMPSU based on the average price for power in Germany (EUR 0.30 per kWh) which is quite expensive. The yearly cost for recharging daily:
- smartphone EUR 1 - 1.50
- tablet EUR 4
- laptop EUR 10
- smartphone EUR 1 - 1.50
- tablet EUR 4
- laptop EUR 10Nobody cares about efficiency. Especially if the costs is just a drop in a bucket.
It gets worse...
Be afraid, be very afraid...
PerryCAD!
It gets worse...
Oh boy, I don't know whether to or
It gets worse...
Notice how the first half of the question uses the "work with" wording, implying a relationship among peers, but then in the next half of the question she immediately transforms this into a management issue, implying a superior-subordinate relationship.
Be afraid, be very afraid...
PerryCAD!
Why doesn't she ask her design department?
It gets worse...
...
If after all that someone not only can't answer one of the most basic questions of hiring/managing, but can't realize the privileged position they were in, then they are beyond hope and squandered an incredible chance of several lifetimes.
squandered an incredible chance of several lifetimes.
Goes to show, once you're part of the in-crowd, there's no falling out of it.
For those interested in wireless power in general, Ossia got FCC approval under Part 18 for their RF based system. It's pretty limited, only works within 1 meter, fixed transmitter and receiver. I estimate about 1.5 to 3% efficient overall, with between 0.5 and 1 Watt to the battery. It's at the SAR safety limit, so no increasing from here, it's as powerful as it gets.
https://liesandstartuppr.blogspot.com/2019/06/ossia-and-fcc-approval.html
I've only just seen this. I'm particularly wondering how it practically co-exists with other 2.4GHz ISM services such as WiFi, Bluetooth and wireless peripherals like keyboards and mice. If they're managing to see 0.5 to 1W at the receiver, good luck with the LNA compression & sensitivity on any other in-band service on the Ossia powered device. It'll be like trying to listen to someone whispering at an AC/DC concert.
In addition, like other RF solutions, this might get by in the US by pushing the envelope on FCC regulations, but I highly doubt this will be able to achieve global acceptance without an uphill struggle with a plethora of other local regulators and regulations.
I've only just seen this. I'm particularly wondering how it practically co-exists with other 2.4GHz ISM services such as WiFi, Bluetooth and wireless peripherals like keyboards and mice.