Design Con 2015
Breaking News
Comments
Oldest First | Newest First | Threaded View
Page 1 / 2   >   >>
resistion
User Rank
CEO
wifi traffic
resistion   8/11/2014 7:06:07 PM
NO RATINGS
With so many devices drawing energy from same source, it's obvious there will be loading issues similar to bandwidth issues. Less energy for devices which connect later.

chanj0
User Rank
CEO
Wireless Power (Unintended)
chanj0   8/11/2014 8:59:16 PM
NO RATINGS
Idea sounds brilliant. Challenge is how much can be drawn from WiFi signal that is intended for other purpose. Would it make more sense to draw power from other means such as solar or thermo? On the other hands, for indoor use, I am not too sure energy harvesting is crucial to the future of IoT. I can see outdoor IoT definitely demands energy harvesting though.

resistion
User Rank
CEO
Re: Wireless Power (Unintended)
resistion   8/11/2014 9:09:01 PM
NO RATINGS
I agree, mobile IoT devices would benefit from harvesting more, but since these are personal items it can be derived from the personal activity, i.e., swinging motions.

tb100
User Rank
CEO
Hey!
tb100   8/11/2014 10:05:50 PM
NO RATINGS
" By culling energy from existing radio, TV, and wireless signals, they've developed a way to connect low-energy devices, such as sensors and wearables, to the Internet without the need for batteries or power cords."

 

Hey! I just mentioned that idea a week ago in a comment! How did they develop it so fast?

Just kidding--obviously they came up with idea before me.  This would be great for stress sensors on bridges and buildings. They are very low-power and low speed, so they need almost no power. They could slowly build up enough energy to be able to send out their data when needed.

 

resistion
User Rank
CEO
Re: Hey!
resistion   8/11/2014 10:39:08 PM
NO RATINGS
It sounds like a good match for these immobile, inconvenient-to-maintain sensors. I'd be curious about ambient wireless power level measurements for sure.

loptide
User Rank
Rookie
Everything old is new again
loptide   8/12/2014 12:19:30 AM
NO RATINGS
RFID tags have worked this way for decades. The quality of "articles" here is pitiful.

resistion
User Rank
CEO
Re: Hey!
resistion   8/12/2014 12:45:17 AM
NO RATINGS
It looks like it will be hard to get even 0.1-1 uW/cm2 onto a chip.

http://www.kawarthasafetechnology.org/things-to-think-about.html

prabhakar_deosthali
User Rank
CEO
re:
prabhakar_deosthali   8/12/2014 1:59:40 AM
NO RATINGS
This idea of harvesting energy is very good for sensor netwroks, where the sensors are so remotely placed that distributing power to them via conventional power netwroks is expensive and batteries are not feasible because of the maintenance and recharge issues.

 

Today, our atmosphere is filled with all kind of RF signals - internet traffic on wi-FI routers, FM radio signals, TV signal traffic over various frequency bands and so on.

So a good and judicious harvesting of these signals to generate the necessary power of sensors that are in open atmosphere and away from the power distributions networks will be defintely beneficial.

SSssaggxx
User Rank
Rookie
This was not a brand new idea?
SSssaggxx   8/12/2014 5:34:08 AM
NO RATINGS
Check this 3 years old thread,

http://www.gizmag.com/scavenging-ambient-electromagnetic-energy/19163/

 

"Scavenging experiments utilizing TV bands have already yielded power amounting to hundreds of microwatts, and multi-band systems are expected to generate one milliwatt or more. That amount of power is enough to operate many small electronic devices, including a variety of sensors and microprocessors."

 

There are also some interesting projects in Kickstarter, such as iFind/Wetag, though I don't understand their tricks clearly.

https://www.wetaginc.com/

resistion
User Rank
CEO
good time for reviewing antenna basics
resistion   8/12/2014 9:21:22 AM
NO RATINGS
It's a good time to refresh the absorption and wavelengths of the different bands, at least for better appreciation of the old technology...

Page 1 / 2   >   >>


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
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 ...

<b><a href=Betajet">

The Circle – The Future's Imperfect in the Present Tense
Betajet
5 comments
The Circle, a satirical, dystopian novel published in 2013 by San Francisco-based writer Dave Eggers, is about a large, very powerful technology company that combines aspects of Google, ...

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 ...