Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 4 / 4
old account Frank Eory
User Rank
Rookie
re: London Calling: Forget wireless charging
old account Frank Eory   3/1/2013 5:43:01 PM
NO RATINGS
You're right, it's not completely free, but it should be negligible compared to the load placed on the alternator by the rest of the car's electrical systems -- headlights, heater, audio system and the various electronic control systems. A/C is different -- a substantial mechanical load placed on the engine when the compressor is on -- and indeed running the A/C has a measurable effect on mpg. It would be an interesting calculation -- the actual mpg cost of charging a cell phone -- but I suspect that driving habits have a far greater impact on mpg, for better or worse, than charging a phone.

Peter Clarke
User Rank
Blogger
re: London Calling: Forget wireless charging
Peter Clarke   3/1/2013 5:11:25 PM
NO RATINGS
@Frank The argument that the electricity generated in the car is somehow free is surely spurious. If you put a load on -- to charge phones, or run the air conditioning -- you reduce the miles per gallon.

tpfj
User Rank
CEO
re: London Calling: Forget wireless charging
tpfj   3/1/2013 4:03:45 PM
NO RATINGS
I think the argument goes something like, I have 4 phones in the house, a tablet (or two), a cordless phone (or two), a laptop, a remote, several battery operated kids toys and a plethora of chargers to support them all. If we all played nice and built a one size fits all charger, I think your argument applies (which is what wireless charging is trying to be). Why do you believe that efficiencies won't get better with further development like they do everywhere else over time? Think of the possibilities if every AA or AAA battery in your house was wirelessly rechargable. I think that's eco friendly enough for all, rather than the billions that get dumped in landfills every year? Many many more products out there simply don't come with chargers than those that do ...

krisi
User Rank
CEO
re: London Calling: Forget wireless charging
krisi   3/1/2013 3:49:14 PM
NO RATINGS
I really don't understand value proposition for wireless charging. I still need to bring my device to be charged in close proximity to the wireless charger. How is that different than connecting it to a wired charger? Are we really that lazy that we want to save ourselves the effort of pushing into the plug?

old account Frank Eory
User Rank
Rookie
re: London Calling: Forget wireless charging
old account Frank Eory   3/1/2013 3:29:05 PM
NO RATINGS
Many people believe the killer app for wireless charging is for the automakers to embed it in the center consoles of cars. From an energy use perspective, there is no waste there -- the electricity will be generated anyway as a byproduct of the engine running. For home or office charging, the concept of a charging mat that plugs into the mains doesn't seem like a huge benefit to me. But if charging mats get embedded into office desktops or kitchen countertops -- with a permanent connection to the mains -- it starts to get more interesting. As for efficiency, your comment about "do the right thing and plug in a wired charger for the time it is needed and then disconnect it" sounds great, but I suspect few people actually do that -- not because of lack of concern about wasting energy, but more out of concern that chargers have a habit of disappearing when not plugged in. Standard wall wart chargers could indeed be made more efficient by becoming smarter, but that seems unlikely. Who is going to add intelligence to a $5 wall wart in the interest of energy conservation, and which consumers will pay extra for that?

Traces
User Rank
Rookie
re: London Calling: Forget wireless charging
Traces   3/1/2013 3:07:19 PM
NO RATINGS
Yes, duh. The thing that you leave unmentioned is that the wireless ecosystem that was supposed to come with wireless charging, i.e., 60GHz fat pipes, is also dead in the water as a consequence. If you have to plug in your smartphone to charge, why wouldn't you use the same plug to stream video to your TV?

<<   <   Page 4 / 4


Top Comments of the Week
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Carlos Bueno

Adventures in Userland
Carlos Bueno
Post a comment
Editor’s Note: Excerpted from Lauren Ipsum: A story about computer science and other improbable things, author Carlos Bueno introduces us to Lauren and her adventures in ...

Max Maxfield

Tired Old iPad 2 vs. Shiny New iPad Air 2
Max Maxfield
8 comments
I remember when the first iPad came out deep in the mists of time we used to call 2010. Actually, that's only four years ago, but it seems like a lifetime away -- I mean; can you remember ...

Martin Rowe

Make This Engineering Museum a Reality
Martin Rowe
Post a comment
Vincent Valentine is a man on a mission. He wants to make the first house to ever have a telephone into a telephone museum. Without help, it may not happen.

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
16 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Doug Bailey, VP of marketing at Power Integrations, gives a ...
See how to ease software bring-up with DesignWare IP ...
DesignWare IP Prototyping Kits enable fast software ...
This video explores the LT3086, a new member of our LDO+ ...
In today’s modern electronic systems, the need for power ...