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Catching up to this one. Came here after the Brush DC motor lectures.

Iron

Have used solar in several remote applications

Iron

hello all from Edmonton, Alberta

Iron

GREAT PRESENTATION & VERY INTERESTING!

let us see the next topic for energy harvesting...

much appreciated, excellent sir paul...

the lesson reminds me when i was in university for all engineering subjects...its great!

now i am in slide 12...

here i am now to begin the class...

i am now downloading the educational materials for reference while sir paul discussing the subject matter...

good evening sir Paul...

here i am again for another continuing education...

thanks again...

Paul

First lecture and a great one to get the brain in gear. Thanks for the review!

Iron

Apple hitting head - that's momentum, not force... depends on the velocity and mass (velocity - on time/distance of fall, if we ignore the air resistance)

Iron

Slide 8 - aren't we suppose to convert from Kg to Newtons?

Iron

Very familiar with SI

Iron

Great to have access to the recorded sessions!

Iron

Missed the live version

Iron

Taking the class offline

Iron

Learned the SI units and use them all the time.

Iron

Hello from Sunny Mazatlan Mexico. Just catching up with the courses.

Iron

Solar and mechanical force

Interested in solar and piezo harvesting energy

See y'all tomorrow (today, now)

Nice talk, thanks Paul.

Iron

I am considering energy harvesting for small microcontroller projects which require very low energy. Smart sensors in general really.

Iron

The limitation of Solar Impulse is the human factor - pilot fatugue! Else it will keep on going!!

Got to see Solar Impuse few days ago - it is in San Francisco bay area getting ready for US cross country tour.

This is interesting & useful topic.

Catching up after day's work!

Good session, thanks

Iron

:) bye for now :)

Iron

good day to all :)

Iron

thank you for a good info

Iron

Paul, Yep spot on but I take your point about this class focusing more on naturally occurring energy. It's interesting stuff! A lot of what you are covering are points we are looking at to see if we can interject our type of tech into these markets or applications. Thanks for a good intro, see you in class tomorrow! 

So long for now, see everyone tomorrow...

Blogger

I did not know the pilot valve was powered.

I alway thought it was mechanical only.

Blogger

On the light in Boston I wanted to say that in waterheaters that have a standing pilot they use a thermalcoouple to actualy power the relay so if the pilot went out the valve would close.  I would think they could use one that was modified to be perhaps parabolic in shape and coated to reflect visible light but absorb IR for heat to power the thermalcouple.

Iron

Ahhh - I see your point.  Yes perhaps Beta Voltaics

is just like a solar cell in its energy relationships.

Blogger

I'm enjoying this topic

Iron

Paul, we like to compare the Betavolatic idea to the likes of Photovoltaics but we are using an isotope rather than the sun. :) this way it is a little easier to explain. 

Mark, yeah that is the key, trying to find a good application of devices that can ultilize such low power over a decent amount of time 25+ years 

There are products that harvest ISM Band RF energy.  Energy

from your WiFi access point can be harvested.... There are products

on the market today that do it.  Power is real low, but it works.

Blogger

Thanks on the Betavoltaics definition. I'd never heard this term before, although I know that the isotope generation is used on various space craft, althogh I'm not familiar with the details or whether such systems are commercially available.

I had heard that harvesting energy from a commercial wireless source (broadcast or Pwr co) without consent is stealing.  Even from a cellphone.  Even though wireless is all around us, I have not seen any legal position regarding harvesting indiscriminately.

Iron

Betavoltaics.. this too is cool, but a bit esoteric

for our class.  Technically, betavoltaics might be

classed a battery, not the collection of energy which

happens to be hanging around.

Blogger

@MarkSHarris - Betavoltaics are energy sources whereby the energy is obtained from an isotope that is used in conjuction with a semiconductor. This way the energy is subject to the isotope (half)life as opposed to standard batteries etc...

The SI document is great - I don't have the link here

but I will try to find it for you.

Blogger

@desnotes Many years ago I heard of a farmer getting arrested for power theft. He had a big loop in a barn under a transmission line. He used it to light the barn.

Iron

Desnotes: Good question. I have heard of schemes that use air core inductive coils to steal electricity, but one has to be under a high voltage power line. And the electric utility did consider it stealing. Howwever, if a UAV flew near a power line long enough to charge its battery, I doubt anyone would care.

Getting back to the gas lamps.  The light of the

lamps are quite bright and the cell is right there under

it.  Thus I would assume that energy is converted even

at night... also, at night, one would know if the lamp

is on or not for safety reasons.

Blogger

Paul, can you please indicate (a link ?) again how to get the document with the extensive SI conversion appendix ?

Iron

'Harvesting' electric power from power lines can

be a dangerous proposition depending upon how

close you get.   I think it would be considered stealing....

I suppose that depends on your point of view.

Blogger

I have always wondered how well microwave energy transmission

works - how dangerous it is in the field, and what losses are encountered.

Clearly, such systems are a bit beyond our scope this week, but I am

interested to know how they work.  Any thoughts?

 

Blogger

Is electromagnetic radiation harvested from power lines considered stealing?

Iron

There was a Darpa experiment that demonstrated power transmission via microwaves between two of the Hawaiin Islands.Precursor study for orbital solar power farms...

Thermal energy is interesting as a flow of heat like heat is

a fluid.  'Heat' flows from here-to-there, and in so doing

causes PN junctions to generate energy!!  That is what a TEG

is and they work quite well.

Blogger

For thermal energy harvesting, the heat sink effective thermal resistance should match the TEG for maximum power output

Iron

Thermal energy can be supplied by various isotopes (PU 238) Much longer lived than batteries

what energy is legal to harvest and what energy is illegal?

Iron

Slide 20 numbers.... no hard answer here.

Size of circuitry and energy conversion apparatus

vs amount of energy harvested.  There is such a

wide variety really.

Blogger

How about inductive energy harvesting from hi tension lines? Say for a small UAV?

@Paul Do you know if those gas lamps get significant energy from the gas light compared to the solar energy? Can the system get by with smaller battery and solar cell?

Iron

Thermal energy extraction, there are lots of methods.

I think the Wednesday class will talk about TEG's these

are really interesting for thermal energy conversion - and

they are GREAT.

Blogger

What is betavoltonics, that someone mentioned?

 

Can anyone explain how the energy density is derived for the applications on slide 20?

Iron

Loved the gas lamp gas saver example. Thanks for the refresher.

Iron

I'm interested in thermal energy extraction.. need 3-5W continuous. Based on your one summary page, equates to 500 cm^2... Hmm, I might actually have 500 cm2, but cost effective?  I'm sure this is highly dependent on deltaT.  Great intro preso today.

 

Iron

Bio sensors are powered thermally, there is a company

making a small cell that does just that and fits on your

wrist.  I'll try to mention it in the next days.

Blogger

This is a very interesting application for us as a medical device design/manufacturer.  With devices getting smaller and heading toward personal monitoring, we have to keep in mind various ways that they can be powered by the person wearing them.  
Thanks for an interesting first day!

Iron

Excellent, I'll be back tomorrow.

Iron

Tidal energy is interesting.  We won't get into it,

but the El-Sharkawi book in the day-5 bibliography

chapter 6 is a GREAT source of info on all this!!!

 

Blogger

Fun refresher course!

Iron

A temperature difference can produce energy. Are any bio-sensors powered this way?

Thanks paul, looking forward to the rest of the week.

Iron

good application there with the gas lamp ... good intro / overview, look forward to next set of classes ... take care Paul and Anne ...

Will there be any coverage about Betavoltaics during the week? 

 

Thanks Paul, for the great intro/summary on the importance of energy related calculations

Iron

You will be talk about AC control motor?

Thank you,

Rod

Iron

Thanks Paul and Ann. Audio was very clear for me today.

Iron

furnaces sense similar condition as a requirement (gas / no spark )

What about microbial energy ?

 

Iron

Thanks Paul, much appreciated. Can you discuss energy harvesting vs energy conversion?

Iron

Thanks Paul" Looking forward to tomorrow

Iron

Thank you Paul for the intital review. i look forward to the next session.

Iron

Except with the audio issues..... Nice conferent

Iron

Thanks ill be here tomorrow

 

Thanks, see you tomorrow

Iron

Thank you Paul, great presentation.

Iron

Thank you, Paul and Ann.

 

Iron

Great stuff, Paul! Really looking forward to the rest of the week, too.

Iron

Thank you Paul for the presentation

Iron

do photons try to return to their source?

Great Presentation, be here tomorrow.

Iron

Good lecture!

See you tomorrow.

Iron

@jamesbailey:

maybe, you should contact the TI mcu team. They might be interested in an evaluation.

Iron

How about tidal energy? Any applications?

Iron

I had a friend that had problems with her watch stopping every weekend.  They found that she didn't move enough on the weekend to keep it wound.

 

Iron

great summary, looking forward to looking at the different sources of energy harvesting! 

I am interested in harvesting heat energy from steam piping to power sensors and DAQ (strain gages, thermocouples)

 

Iron

unfortunately, your presentation is so fragmented as to deny the ability to follow it. Looked interesting! Thanks anway.

Anybody have a ultra low power device they are looking for an energy source to power it?? We deal with nano watts of power and are looking for applications to link with

 

Plane is too slow for my taste.

Iron

Vibrations from motors and gears on our machines

Iron

 Yes, want to use energy harvesting to power an induction heater

Iron

@wonohkim I still have sound

Iron

Not looking at energy harvesting yet.

Iron

how about wind energy

Iron

Today's next audience question is
Have you been thinking about clever energy sources for your application?

Blogger

think of all that energy in the Boston Marathon today??

depends how high your  blood pressure

Iron

someone then might want to see "CALORIES"??  (4.1840 joules??)

Sorry Ann...no better answer for heart energy question

Iron

If I remember correctly a car battery or a stick of dynamite contain about 1 MJ; approximately the same as pulling the car for 150 m in slide 9.

Iron

Don't have a particular application in mind. Learning the technology to see if it can be applied in our sensor systems.

Iron

Apparently a new update for Adobe Flash was pushed out recently.  Fixed the issue with Firefox.

Iron

Today's next audience question is
Does anyone listening have better calculations for the energy and power produced by the heart?

Blogger

less than 10 miilliwatt

Iron

Low tens of milliwatts

Iron

do not have design or project in mind yet....unsure of energy needs

Iron

Energy levels on the order of mobile devices or automotive devices.

Platinum

Today's next audience question is
What energy or power levels does your energy harvesting application require?

Blogger

Yes SI was reqd in college & is the standard in all analytical chemistry work.

Iron

Yes, during the first semester (electrical engineering) in field theory + a sensors&measure lecture.

Iron

I get one second of audio then nothing. Logged out, etc.

Iron

Have not read SI unit system

Iron

yes, of course (about SI)

Iron

Today's next audience question is
Has anyone listening actually read or reviewed the SI unit system?

Blogger

Hello, Sound finally started.

 

Iron

I'm using crome...no issues with audio....some issues with posting

Iron

log out  and relog in

Iron

FYI -Firefox with the updated Adobe Flash is giving me issues.  Had to switch to Chrome to get the audio.

Iron

Good Morning all from CA

Iron

"try reloading the page...in IE" - sound, finally

 

Iron

Hello from Romeo

 

Iron

posts not all working....interested in solar....no plans yet

Iron

using a tomato or grapefruit as a power source to monitor air and water conditions and transmit data to host

Interested in energy from noise (traffic, factory, etc.) How to turn mVolt levels to 3 Volts or more.

Platinum

Wireless charghing (WLC)

Iron
@mykl317: Please try refreshing your browser and repressing the play button. If that doesn't work, try using Firefox or Chrome if you aren't already. Some people have trouble when using IE.

A quite interesting topic.

Iron

If you're having audio issues, please note that some companies block live audio streams. If you don't hear any audio, try refreshing your browser. The show will be archived and available on this page.

Blogger

Today's first audience question is
What types of energy harvesting applications are you considering?

Blogger

nothing to hear, here, either

 

Iron

@mykl317 try reloading page

 

Iron

Hello from Waterloo

Iron

Hello from Seattle! I still don't have audio.

Iron

conservation of matter and energy rules!

 

@Flux-capacitot did you log in and hit arrow on gray bar?

Iron

Hello from Boise ID

Iron

Hello from Milwaukee!

Iron

Checking in from Battle Ground, WA

 

My favorite site for converting various units is http://www.onlineconversion.com/

Iron

Hi all - Audio is live!

Hello from British Columbia!

Iron

Thanks. That conversion is not on my HP-48

Greetings from sunny CA

Iron

BTU  = .29305 watt-hours

Iron

1 kilowatt hour = 3 412.141 479 9 Btu

Iron

Hello from Chicago

Iron

Can anyone convert BTU's to KWhrs?

Hello from Montreal, all set to go

Iron

good afternoon from SW Michigan

Iron

not since I talked with Avogadro....

 

Iron

Spring has been since the 21st of March with 12 hours of sunrise and sunset

Iron

You are right everyone, its Yocto, has anyone

actually ever used this dimension in a real application?

I have not.....!!

Blogger

almost 70 in sunny Buffalo... this won't last ... but it looks nice out there.

 

Iron

Spring has been since the 21st of March with 12 hrs of sunrise and sunset

Iron

Bright and sunny in Valdez at 31 deg. Morning to all

Yotta=10^24, Yocto=10^(-24)

Iron

Hello from Philadelphia, no audio yet...

 

Iron

14 hrs 54 mins daylight

Iron

Hi from Massachusetts....spring may be on the way.

 

Iron

Hello from Albuquerque.

Iron

Hello from SLC, 20 minutes to go

 

Iron

Slide 6, isn't 10-24 supposed to be yocto.  Looks like a typo.

Iron

Hello from California, only 30min left ...

Iron

Hello all - A new slide deck with slide numbers added was just posted. Please refresh your browser and download the new version.

Aloha from Montana

Platinum

Hello from Brazil.

 

Iron

Hello from cloudy Atlanta.

Iron

Never mind, now posts are going in, confounded internet.

It looks like the chats are gated, or broken. I can't post to Day 3..5

==========================================

Better late than never ....

Coffee hansn't kicked in - make that Portlandia! :)

Hello from Goshen, IN.

Greetings from Raleigh, NC

Iron

@gordonmx: The slide deck has not changed since it was originally posted.

Hello from So. Cal. Lets get our energy on!

Iron

I download the slides last week.  Have they changed?

Iron

Good morning from Mobile, AL

Slide # 9 - The analysis seems flawed.

Blood moves over the entire body with the same pump stroke, not just one section of vessel. At a bare minimum the acceleration of the entire mass needs to be accounted for. Also - vein walls are distended storing energy.

Hi from San Jose

 

Iron

Be sure to follow @designnews and @DigiKeyCEC on Twitter for the latest class information. We encourage you to tweet about today's class using the hashtag #CEC.

Blogger

Please join our Digi-Key Continuing Education Center LinkedIn Group at http://linkd.in/yoNGeY

Blogger

The streaming audio player will appear on this web page when the show starts at 2pm eastern today. Note however that some companies block live audio streams. If when the show starts you don't hear any audio, try refreshing your browser.

Blogger

Be sure to click 'Today's Slide Deck' under Special Educational Materials above right to download the PowerPoint for today's session.

Blogger

Good afternoon everyone!  Looking forward to this!

Iron

Hi from Panama City, FL

Iron

St. Catharines, Ontario, checking in.

Iron

Hello from Chihuahua, Mexico

Iron

Hello from Binghamton, NY

Iron

Ureka! Success! Slide deck 1 is there.

Hello all.

Iron

hello from Ottawa, ON.

 

Iron

Logging in from Chi-town!

Iron

Spring is about to happen. Maybe today for Aurora Ontario.

Iron

Looks like slides are fixed.

Good morning,from Scottsdale AZ.

Iron

Slides still no go...

Iron

Good morning from Portland Oregon.

Iron

Good morning y'all!  Still waiting for Spring to show up here in the Midwest...

Iron

Slide not ready yet...

Iron

Your right It's a little early.The slides aren't up yet. 

Iron

Never complain when I wake up see daylight.

Iron

And I can't download slide deck either..

0 Dark 30 here in Valdez, but we're gaining about five minutes of light per day.

Do I have to log in before 2 pm EDT in order to be consider for the $25  starbuck gift card ?

Iron

Getting error while attempting to download slides:

 

Server Error in Application "DOWNLOADS.DEUSM.COM"

Detailed Error Information
Module IIS Web Core
Notification MapRequestHandler
Handler StaticFile
Error Code 0x80070002
Requested URL http://downloads.deusm.com:80/designnews/DN_CEC_EnergyHarvesting_Day1.ppt
Physical Path e:\live\web\downloads.deusm.com\designnews\DN_CEC_EnergyHarvesting_Day1.ppt
Logon Method Anonymous
Logon User Anonymous

 

Andrew-88 You can always view the lecture later, thae archival copy is good.

Iron
Andrew_88: You shouldn't have a problem. The audio works great on the stock Andriod browser with Flash support.

Hi - what are the platform requirements for the lectures?  I will be at a trade show on at least one day and it would be *great* to be able to use a small android tablet instead of a full laptop to attend.

Iron


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