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Thank you Carol, very good articulating parts and ordering information.

Iron

sr electronics design engineer, thanks 

Iron

Hi, yes currently working on a LED sign design 

Iron

From the earlier post from eia.gov regarding lighting use and power consumption 101 BILLION kWh in the US (2001) the need for power efficient lighting becomes clearer.  LED's are one possible mechanism to introduce power savings. 

Digi-Key is quite wonderful isn't it ...

Glad to see the Circuit Board Layout Software you presented

I was not sure if the focus here was on LED's or on board design and layout ...

Practical Lighting Design with LED's sounds interesting. 

 

Lighting includes both indoor and outdoor lighting and is found in virtually every household in the United States. In 2001, lighting accounted for 101 billion kWh (8.8 percent) of U.S. household electricity use. Incandescent lamps, which are commonly found in households, are highly inefficient sources of light because about 90 percent of the energy used is lost as heat. For that reason, lighting has been one focus of efforts to increase the efficiency of household electricity consumption.

LINK -->>  http://www.eia.gov/emeu/reps/enduse/er01_us.html

Planning to work on it very soon

Not currently working on one or planning on using it right away but maybe in the next few months

Supervisor, Automation/Electronic Engineer

Iron

Not working on one at this time, just curious on what has happened in the last few years.

Iron

Thanks for giving us this information.

Iron

thanks Carol. Very Informative!!

Iron

Systems Engineer/Architect

Iron

Controls Engineer

Momence IL 60954

Iron

Hello from upstate NY

Iron

Thanks Carol, very good introduction

Iron

Job Question, I am a retired electronics / student / DIY Homeowner.

Iron

Yes to L.E.D. question.

Iron

interesting lecture, thanks

Iron

Thanks for the kind words, everyone. See you tomorrow!

Blogger

R2 is not the main loss. The lossiest component is usually the one that heats up the most. MOSFET and Diode are likely suspects.

Blogger

@The_John: Just found this from the DesignSpark site, http://www.designspark.com/pcb:

DesignSpark PCB is offered completely Free of Charge and fully featured. This is not a cut down version of an expensive product or one with a time limitation on license. (There are no intentional limitations on designs). There are unlimited schematic sheets per project, up to 1m squared of board size and no limits on layers, which allow you to get your creativity flowing without restraints.

Iron

PF and input filtering are usually in the design. I didn't mind leaving them out this week since it wasn't in scope for learning to prototype. It's really a power supply design issue. Sorry.

Blogger

Thanks everyone for attending. And thanks Carol for a wonderful presentation.

Blogger

Engineering Technician, R&D

Iron

DesignSpark is the PCB software. I'll be going over that extensively in the next 4 days.

Blogger

Thank you very much Carol.  Looking forward to the rest of the Series.

Iron

Sr. Engineering technician

The_John asks:

 

How many layers can you do with the free Design Spark?

 

Blogger

Thank you Kentj.  Last minute meeting conflicts with tommorrow's seminar.

Iron

2oraQ9hB asks:

 

No power factor correction or input filtering?

 

Blogger

@jlow2010 Today's is already on archive. I'm listening to it now.

Iron

Kellyrn asks:

 

Is R2 the main loss in the circuit?

 

Blogger

20raQ9hB asks:

 

What application software was the schematic done in?

 

Blogger

I hope to see you people tomorrow.

 

Iron

This might of been answered before but I cant seem to find the answer.  Will an audio file be available for these training programs after there completion?

Iron

KindaElectronics asks:

 

Why do you use CX1 & C2?

Blogger

Very interesting lecteur

 

Iron

MLCC is multi-layer ceranic capacitors. More advanced tech and cost more, for very high voltage, 500V. So unless you need it, I'd ignore it.

I was just trying to say that one way to find what you need is by trial and error. Don't be afraid to try something and play around. You'll probably learn something along the way.

 

Blogger

BruceW notes:

 

Parametric search works best if you select one parameter per search.

Blogger

A xfr (transformer) would be half a pound for 12 W. Not practical. That's why switch mode power supplies are used.

Blogger

przemek asks:

Why did you chose Surface MOunt MLCC rather than simple Surface MOunt; you said you tried both but what made the difference

Blogger

For 277VAC design, you need higher voltage parts and some modfications to the circuit. There's not a simple answer to that. 

Blogger

will you be using a xfr to lower the input voltage?

Where on the web site is the material look-up for parts?

 

Not sure what you mean, but the search box is on the upper right.

Blogger

Hello from Milwaukee

 

Iron

How could you modify this design to accept 120-277VAC? 

 

Iron

Thanks somebody for the suggestion of Chrome.  Audio works with that but it's on archive already.

Iron

Why doesn't DigiKey provide footprints and symbols for thier parts?

Iron

@przemek - Thank you. Now I know what to look for I found it.

@KindaElectronics

You can reach me at sales@reliabulb.com
Blogger

Sorry not seeing any notes on my viewer. will try slide show on an xp machine.

 

Iron
the link is in the notes to slide 6
http://bbs.dianyuan.com/bbs/u/44/1154739695.pdf
Gold

Wouldn't you normally use metal pad package for high powered LED? Don't you need that for thermal management?

Well, since cost is critical these days for everything, you start with cheaper. In my experience it's usually not needed. The IC doesn't usually get that hot. Try to pick an MOSFET with low gate current. Also if the IC is in a hot environment, like automotive.

Blogger

Where on the web site is the material look-up for parts?

 

Iron

2orQ9hB asks:

What makes it a "power" inductor?

Blogger

Did I hear that there is a link on this page to the driver used as an example today?

Is there a way to avoid the cut tape fee when ordering low quantity SMT's?

Iron

@garysxy Thanks for chipping in for the tip! Great to see an interactive audience.

Blogger

Wouldn't you normally use metal pad package for high powered LED? Don't you need that for thermal management?

Gold

Thank you Carol

Quality Engineering Tech III

 

Carmine notes:

I believe only the MLCC technology will allow such a large value of capacitiance.

Blogger

great lecture Carol. Thanks for the information. looking forward to tomorrow!!!

Is the assembled HV9910 Demo Board available for purchase?

Iron

Owner / Electrical Engineer @ Vanquint, LLC

Actually, I answered that question.

Iron

Carmine asks:

What makes it a "power" inductor"

It is passing a lot of current.

Not some small inductor used in a tuned circuit (for example)

Blogger

How do you extrapolate maximum pulsed power (peak current, voltage, duty cycle, etc)  for an LED that is say rated @20mADC?

Use the Absolute Max rating.

Blogger

thanks for the presentation.

Iron

FIELD ENGINEER. Maintain, analize, and service field systems. Also design upgrades for installed units.

Thanks Carol and Rob. See all tomorrow.

Carol, great that you showed how to find parts and datasheets on the Digikey website. I don't keep data book anymore. This one website has all I need to find a part, application notes from the manufacturer and usually in-stock for my needs.

Iron

Power inductor can take more current. About 1 amp inductor for 400 mA LEDs.

Blogger

How do you extrapolate maximum pulsed power (peak current, voltage, duty cycle, etc)  for an LED that is say rated @20mADC?

Iron

Chieff Cook and Bottle Washer at a startup.

Gold

@Rob: my title is Senior Software Designer. Thanks for the interesting lecture today.

Iron

Thanks Service tech.

 

Iron

Thanks Kdslezak. Well noted.

Blogger

RTL Design & Verification Engineer.

Iron

Electrical hardware designer

Iron

Tashfique asks:

The universal Led driver how do you program it? It controls the switch to the boost convertor?

Blogger

"job" - artist (self-taught)

Iron

Rob -- just so you know, when the "radio" automatically connects at the beginning of the lecture, you are already into your introduction. You may want to wait 5-10 seconds after you "turn on the audio feed" before you begin your actual introduction.

Bronze

great lecture, See you tomorrow.

Electronics Technician III i.e. Senior R&D Technician

Technical Content Specialist

Thank you for a good start, should be a good week.

Iron

Hardware Engineer (Consultant)

 

Iron

Automitive Design Lab Engineer @ NXP Semiconductors.

Iron

Express PCB also has some nice free design software.

Iron

Electrical System (Embedded) Engineer

Iron

Qualifications Engineer

Iron

Program Manager, Engineering

Iron

Garysxt asks:

Sometimes you will be looking for a component and there will be several possible categories. You can CTL-click and select several so you cover all bases. I think the manufacturers use different terms for the same thing. These end up on the DK selection list.

Blogger

Hardware Support Engineer

Iron

My title is Engineer.

Iron

Senior Design Specalist

 

Iron

Manufacturing/Test Engineer

Iron

Great lecture! See you tomorrow!

Iron

Embedded Firmware engineer

Iron

Good lecture, thanks Carol!

Iron

The universal Led driver how do you program it? It controls the switch to the boost convertor?

 

Iron

Thanks, Carol. Looking forward to the rest of this course too.

Director of Engineering

Iron

Senior EMC Engineer (HW-EE)

Iron

Construction Contract Administrator

Job Title: Sustaining Engineering Project Leader

Iron

Associate Design Engineer

 

Iron

materials and process development

Iron

embedded firmware engr.

Iron

System/Software/Embedded Engineer

Iron

my job title is a systems admin.  This is more of a hobby interest.

Iron

Carol, thank you! Great lecture

thanks Carol for the info

Iron

@moderator - R&D engineer

Iron

hardware design engineer

Iron

Great lecture, thanks Carol

Iron

Carol, thank you! Great lecture

Iron

Great lecture, Carol.  Thanks!

Iron

Great Info.  Thanks.

Iron

                                                                                   btw, hi

 

Iron

"What makes it a "power" inductor"

It is passing a lot of current.

Not some small inductor used in a tuned circuit (for example)

Iron

Great lecture !! thanks

Iron

We're now on slide 15.

Blogger

Sometimes you will be looking for a component and there will be several possible categories. You can CTL-click and select several so you cover all bases. I think the manufacturers use different terms for the same thing. These end up on the DK selection list.

Iron

Why doesn't DigiKey provide footprints and symbols for parts?

 

Iron

I believe only the MLCC technology will allow such a large value of capacitiance.

Iron

What makes it a "power" inductor?

Iron

How can I re listen to the lecture?

 

We're now on slide 14.

Blogger

We're now on slide 13.

Blogger

Why did you chose Surface MOunt MLCC rather than simple Surface MOunt; you said you tried both but what made the difference

 

Gold

hi the audio is not working

 

Iron

Sorting based upon price was a great addition by Digi-Key.

Iron

We're now on slide 12.

Blogger

It's not a browser problem, per se, it's an Adobe Flash version problem. -- If you've upgraded to Flash 11.4, you'll have problems.  Right click on the Flash player to check its version number.  Browsers still using Flash 11.3 are working for this webinar; those at 11.4 are not working.

Iron

Parametric search works best if you select one parameter per search.

 

Iron

We're now on slide 11.

Blogger

I think we all should check all the software dependencies before hand and avoid crying for help DURING the session... All the messages just flood the page, making it difficult to read other stuff..

Iron

Could not get audio at all with Firefox after several reloads.  Was able to get audio after I switched to IE.

Iron

Going to have to archived this one.
No Audio.

 

Iron

yes, Chrome is working fine

Iron

We're now on slide 10.

Blogger

Chrome is working for me

 

Iron

I have a lot of good reasons for using Digikey for parts ordering or finding datasheets.

Iron

For those having audio difficulties, you might try Chrome. I haven't heard any complaints from those using Chrome. Is that right out there?

Blogger

We're now on slide eight.

 

Blogger

Here's the url:

http://helpx.adobe.com/flash-player/kb/archived-flash-player-versions.html#main_Archived_versions

 

Iron

Also no audio.  Radio says "buffering" but seems to be doing nothing.  F5 doesn't function normally either.

Iron

What application software was the schematic done in?

Iron

From adobe site flash download archive I believe. Perhaps someone has the url handy?

Iron

We're now on slide six.

Blogger

Is R2 the main loss in the circuit?

 

Gold

No power factor correction or input filtering?

Iron

Thanks Rob... no audio and not worth it anymore.  Please ask your IT folks to correct this for future webinars!

Pause and play does not work, there goes my T-shirt prize

I was logged on half an hour early too. Now I have to try it

archived. Later, Rod. R.

Iron

@drw36 - what's an easy way to downgrade the flash? (for FF)

Iron

We're now on slide five.

Blogger

If anyone is missing audio, this program will be archived for replay.

Blogger

Firefox needs flash downgraded to 11.3.300.271 or earlier for audio to work.

Iron

@checkman - what is your FF and flash versions?

Iron

ok, switched to Chrome and works fine

Iron

Dr.Roy, you might try another browser.

Blogger

pause/play in FF does not work... Chrome plays audio

Iron

I am in firefox and audio is great

 

Iron

ok, switching to chrome

Iron

I have refreshed and clicked on just about every word that looks like a link, and still no audio.

 

Iron

We're now on slide four.

Blogger

anyone has audio in Firefox ?

Iron

How many layers can you do with the free Design Spark?

 

Iron

When Radio bar showed Buffering, clicking the PAUSE and then PLAY got it going again

Iron

Safari sometimes has trouble. Try Firefox or Chrome.

Blogger

@ghorbanali: Download the PPT slide from the link...

Iron

not working in Safari either

download today's slide deck above

 

Iron

You can download the slide by clicking the "Today's Slide Deck" above.

Blogger

No audio in Firefox... Chrome works ok (so far)

Iron

Diptrace is very good software too.   :)

Doesn't work in FF or iexplore...

Iron

There is no presentation here in Central Alaska.

Iron

refresh, reload page and then ......

i hear the blog talk radio and then buffering for ever.

Iron

can we see slides here ?

Iron

Apparently, there is still a problem using Firefox with the latest version of Adobe Flash.  Try Internet Explorer, Chrome, or downgrading your flash.

Iron

Refreshing your browser may help correct sound problems.

Blogger

I will work in a LED poryect in abou 6 onths

Evaluating a LED lighting application.

Iron

No audio problem for me!

 

Iron

We're now on slide three.

Blogger

worked on phone panel before. 

Iron

i hear the blog talk radio and then buffering for ever.

Iron

Refresh your browser to receive the audio.

try browser refresh for audio proiblems.

Iron

(from Boston) working on a project that has some LEDs in it.

 

Iron

Not working on an LED Project as of now..

Iron

The sound is still blocked.

Any way to have the system go through other ports?

Other webinars work out of the box.

Iron

Projects involve high-intensity ultraviolet LEDs.

Iron

I worked  on some time ago.

Iron

hi, the audio is not working!

please provide assistance.

 

Iron

Yes designing now

 

Iron

buffering, always buffering ...

Iron

Working on a small LED project.

Iron

not currently working on LED project. just here for personal interest and building my knowledge base.

Iron

Not working on an LED project, just tuning in to learn more about the subject.

Iron

We're now on slide two.

Blogger

Refresh if no audio..

Iron

still buffering here

 

Iron

We're on slide one now.

 

Blogger

Has the session started yet?  I can't hear anything.

Iron

Audio is messed up. multiple sources.

 

Gold

HI from Northern Minnesota

 

Iron

Good afternoon Carol.

Iron

Hello from Ottawa, Canada

Iron

Welcome everyone! Talk to you soon.

Blogger
Hello from Mesquite NV
Iron

Hello from Maryland.

 

Gold

Hello from Irvine, CA

Iron

Good Morning from Fresno

 

Iron

@danlafleur: Thanks. But I prefer saving to disk and I use VLC to do it..

Iron

Hello from Casper WY

 

Iron

Good afternoon folks.

Iron

@Reyaz, the audio is recorded and available in the archive soon after the session is over.

Iron

okay..

Do you guys record the audio as well??

Iron

yes, still on daylight savings time. clocks will go back to standard time in November. "spring forward, fall back".

Iron

@kinda: I think we will go thru BOM and comp selection for led driver...

Iron

Reyaz. Where is your business?

 

@Rob: Thanks, I was confused with the time switching.. Its clear now..

Iron

@bobybacs: Okay, Thank God its summer, now I have class at 11.30PM instead of 12.30AM.. :)

Iron

Hello from Albuquerque, home of the Albuquerque International Balloon Fiesta, starting next week.

Iron

What are we going o learn today?

Reyaz, the class beings at 2:00 pm Eastern.

Blogger

@Reyaz: No, only switched to summer time

Iron

@Rob:  Zwilrich, I'm not sure. I hope they have.

I guess we will find out in 13 minutes.  Thanks for the response.

Iron

Attending after a long gap.. Did the class time get advanced by 1hour..?

Iron

hello all from Edmonton, AB. The geese are gathering to go south, wish I was going with them.

Iron

hello from Troy, MI

 

Iron

Hello from Phoenix, Arizona

Your host is coming in from Albuquerque

 

Blogger

Zwilrich, I'm not sure. I hope they have.

Blogger

Hello from Sunny SE Lake Simcoe Ontario Canada

Iron

Howdy from Fort Worth, TX !

Iron

Hello everyone from Romania ;)

Iron

@Rob Spiegel

Have the audio issues with Firefox been fixed yet?

Iron

Hello everyone forn Culiacan Mx

Hello from upstate NY

Iron

Good morning from Southern California

Iron

Good Morning from Silicon Valley CA. It's 52°F Partly Cloudy Monday Morning. Will peak @ 80°F tjis afternoon.

Iron

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

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

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

Blogger

Prior to my attending to today's class, I'd like to know if, on functionally basis, there is difference between shift register and LED Driver. I may be confusing them.

Iron

Looking forward to the class.

I need the slide deck. Rod. R.

Iron

Eureka!  Congrats for Big DigiKey Family initiative

Will the course cover thermal management?

Iron


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