HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
You must login to participate in this chat. Please login.

thanks once again sir randy for giving this kind of lesson for day 3 class. now, another day 4 to go ahead for this course to finish the class for 1-week...

thanks to digikey and design news for giving this PDH Continuing Education for our improvement and development in adding additinal knowledge in mind for our engineering profession...

thanks to all...

very interseting...i am now in slide 18 of this presentation...

great case study sir randy...much appreciated!

i am now in slide 9...

i am now on slide 4 of this class presentation...

another point to learn with the case study of smart sensor development...thanks alot...

good evening sir randy, here i am again for day 3 class lesson...

Very interesting case study

Iron

Magnetic field, proximity, positioning...

Iron

Great to have access to the recorded sessions!

Iron

Missed the live lecture

Iron

Taking the class offline

Iron

 

Identifying suppliers - search the Design News articles archives.  Lots of times there are articles on devices - from sensors to microcontrollers and more, that show good comparisons with background information.

I am mainly interested in all the differnt sensors availible

Looking forward to another great lecture

I'll try to be on next lecture, bbl

Iron

Really, TI got with WEBENCH is best acquisition from NS. It's quick way to use knowledges.

Iron

Thanks Randy, nice lection and presentation, very usefull links presented too.

Iron

thanks Randy, good presentation

Iron

well, beter late than never

Iron

Thank you Randy, see you tomorrow!

That's going to do it for today. Thanks for attending.

Blogger

Q: What is the control technique in case when temperature does differentiate the accuracy of sensor readings in the pressure measurements?

You normally either need to monitor a parameter that changes reasonably linearly with temperature or have an additonal internal or external temperature sensor.

Blogger

Good info! Also, regarding himidity sensors, will this be a topic of discussion on Friday?

 

check out:http://www.sensirion.com/en/products/humidity-temperature/?gclid=COPin9qh_7QCFeGDQgodoyIAbg

the SHT 10/11 or 15

Blogger

Q: What is the control technique in case when temperature does differentiate the accuracy of sensor readings in the pressure measurements? 

@Deb C: how can I send you my gift card ?

Iron

Good info! Also, regarding himidity sensors, will this be a topic of discussion on Friday?

It is not in the presntation but you can see sevral choices at:

http://www.digikey.com/product-search/en/sensors-transducers/humidity-moisture/1966708

Blogger

Q. What factors I need to consider to choose, for example, a pressure sensor for a medical application?, Can I choose any sensor from the market or it has to be special?. Thank you.

Sensing in medical applications can pose a few callenges. The first level is whether the sensing is external or internal. Obviously thermometers can address internal (but not invivo) measurements rather easily. Internal blood pressure measurements have specifcations that have been developed. Some sensor suppliers caution against the use of their products in medical applications.

Blogger

That would make it make more sense as you noted the premise was based on a filter for a computer filter not a fillter in a pneumatic or hydraulic system.

Iron

I agree with what Douglas stated below

Iron

Since you are checking pressure drop across a filter, what is the system pressure.

This would determin the common mode presure the sensor must tolerate.

 

Good point. I should have stated air filtering in a computer system. If this was a high pressure water flow application, the common mode pressure would certianly been a top level cosnideration and it would have added packaing complexity to the decision. For air filter monitoring, many pressure sensor suppliers address this type of application and the comon mode pressure is not normally an issue.

Blogger

Since this application was a differential pressure measurement.

The system pressure was never considered,

which determins the common mode range of the sensor.

This actually ends up being the greatest limiting factor in a differential sensor choice.

Q. What factors I need to consider to choose, for example, a pressure sensor for a medical application?, Can I choose any sensor from the market or it has to be special?. Thank you.

Iron

I like the case studies. It is interesting to see thought process of other engineers.

Iron

Good info! Also, regarding himidity sensors, will this be a topic of discussion on Friday?

 

Iron

thanks randy, great job!

 

Iron

Thanks Randy and Cherle. Great lecture and very useful. THanks a lot.

By the way, where is my Starbucks card?

Iron

Thank you Randy and Chuck.

Iron

Thanks Randy & Chuck

Iron

Thank you Randy and Chuck.

Iron

Thank you for a useful lot of information!!

Iron

What is the link for the live chat page?

 

Iron

Thanks Randy & Chuck.

Iron

it's a great pt, Thanks a lot 

Iron

Thank you Chuck and Randy.

Iron

Great lecture Randy, Thank you

Iron

Thkx for the bells and whistles Randy & Chuck.

Iron

of interest is to be able to scale products to size

Iron

when doing differential measurements, you must consider common mode pressure the sensor will see.

depends on application.

Iron

I would prefer one with signal conditioning.

Iron

Have not used these components yet.  Unsure which conditioning option I'd use.

Iron

Prefer internal conditioning if it meets the technical specs and price goals.

Iron

Preference for built in signal conditionning

I would like the option of with and without signal conditioing.  Call me greedy.

Iron

Most cases have internal signal conditioning as it has tighter tolerances, makes integration easier.  Some specific cases external for more flexibility.

Iron

I need the flexibilty gained my adding my own conditioning

Iron

primarily depends on the end target goals, typically driven by cost, but at times other specification requirements drive the choice.

Iron

Sometimes is better with conditioner and sometimes is better to add

Iron

mostly to have the signal conditioning, for a fair cost, but for some applications it is better to add it yourself

Iron

Depends on my application and specifications.

Iron

Manufacturer websites mostly.

Iron

Yes. TI website is a very good place. I just take their AFE device for my OH sensor.

Iron

When searching for suppliers, I proceed with caution, looking at availability, lead times, etc. So, basically my search mirrors Randy's approach for any type of supplier part.

Iron

I would like the option

Iron

Similar issues temp, availability accuracy.

Iron

Web search/specs/trade magazines (like Design News !)

Iron

I would like use Digikey too.

Iron

@LEE337 great screen name

Iron

Besides available parts not showing up in searches, not in stock, minimum quantities,  and not available in packages I want to use.

Iron

You haven't considered common mode pressure

accelerometers (g-forces), temps, other.

Iron

missing data as welll as incorrect data.  Also ambiguity as in temp range but no scale F or C given.

Iron

Same as Randy, temp range not as specified in seach.  Also items not in stock, MOQ, long lead times.

Iron

I like using the Digi-key web site; no problems to mention

Iron

mostly conversion between different measurement systems

Iron

Q: How temperature does differentiate the accuracy of operating pressure?

how specifications, e.g. accuracy is determined/defined.

Iron

Randy expressed it well -- minimize the rejection criteria.

Use the broadest search possible at the beginning.

Iron

Pretty much like Randy said, keep search criteria as wide as possible and do your own elimination of selections.

Iron

Since you are checking pressure drop across a filter, what is the system pressure.

This would determin the common mode presure the sensor must tolerate. 

I will have to think about it

Iron

Sorry late response, temperature, pressure and load.

Iron

I will check with other engineers on who they like if it involves technology I am not very familiar with, but usually default to web.

Iron

Colleagues and supply management...

Iron

Search on the Internet for Manufacturers.

Iron

mostly the same, but sometimes I also begin from relevant Patent documents and their holders.

Iron

In addition to web and magazine articles, etc.  word of mouth.  samples

Iron

No, just regular suppliers and peers

I attend a lot of conferences and seminars, along with the listed recommendations.

Iron

Device manufacturers often have seminars you can attend.  I found some suppliers and device manufacturers this way.

Iron

Email distributors for possible suggestions.

Iron

before searching the web, ask colleagues who are more experienced

Iron

DigiKey tool bar. ;-)

Iron

access network of peers

Iron

TPMS (temperature - pressure monitoring systems) and proximity sensors are also some we are working on

Iron
 
 
 

Temperature, Preasure and Humidity

Iron

CO2,O2 levels, pH, temperature, humidity, light spectrum, light intensity

Iron

Pressure air and water, temperature

Termperature is the most common thing I need to measure.

Iron

Measuring gas concentrations in hazardous environments.

currently primarily temperature, though I've dealt with shock, humidity and other various sensor requirements.

Iron

Acceleration, temperature

Iron

strain, pressure, temperature

Iron

Good morning from San Jose, CA

Iron

Sometimes preasure, more often light or temp.

Iron

i need pressure measurements for compressed air systems, but for some other applications also temperature or humidity

Iron

we measure stress and srtain from strain gages

Iron

strain gauge load cells

Iron

temperature and humidity

Iron

Force, pressure, temperature etc.

Iron

Greetings from Toronto

Iron

Hello, have a nice day.

Iron

Rodney B. Rutherford

721 Keeling Road

North Pole, Alaska (AK)

              997055034

 

Iron

Here we go, audio is up!!

 

Iron

Bummer

on the Starbucks card bobybacs

 

 

Iron

I want a Starbucks gift card for free!

 

Iron

I'm from Romania, Timisoara and got one, we have Starbucks, but they didn't accepted my gift card

Iron

RMRSS: Can I inquire where abouts in Upstate NY?

I'm from there, now in Seattle area.

Iron

who wants a Starbucks gift card for free ?

Iron

I haven't missed a class yet

all 3 semesters, and all of the

ee times classes too.

Iron

70F here,  glad I'm not up there where you guys are.

Iron

We had a high of 9F here in IA yesterday, now it is 20 and snowing.  I think I liked the 9F better...

Iron

Hello from Wichita. KS

Iron

Hi from Midland TX

 

Iron

Hello from upstate NY 11F on the way to 15, hope we make it.

Iron

Good morning from San Jose, CA

Iron

Wo? Where is my coffee cards? only got one. Seemly i am first 25 attendee always.

Iron

Two coffee Cards -- Two T-Shirts have arrived -- I'm in good shape. I can take my wife out on a big night -- in formal wear even... ;-)

This will be biggest night out in years!

Iron

...and she looks REALLY good in her Design News t-shirt!!!   :)

That's why I give my g/f my Starbucks gift cards, she doesn't do coffee either but likes something they offer.  I don't bother, Starbucks doesn't sell Pepsi.   :)

hello from SLC 13F, still only 4 days above freezing since Christmas, 37F is the average high for this time period

Iron

send me thy gift cards :)

Iron

I agree, but fortunately Starbucks has some good stuff other than coffee.

Iron

I'm holding out until we're issued Pepsi gift cards...   :)  Coffee?  YUK!

Hello from Chicago

 

Iron

I need a hot cup of Starbucks coffee. But first, the Starbucks gift card ;)

Iron

Warmer today in Minneapolis... All the way up to +16 degF!

Iron

hello. it is freezing in Philly!

Iron

Greetings from Chicago.

 

Iron

Good afternoon, everyone

Iron

Good Morning from Huntsville, Al.

Iron

Good morning from cold SE Lake Simcoe Ontario Canada -- -28C this morning... It has warmed up to -18C -- poitively tropical bikini weather at noon!

Iron

Good morning everyone. I am in Vancouver too.

Iron

Morning from Vancouver.

Iron

Hi everybody!

Today we have a warm day with 34 deg C

Iron

Good morning from Lynn Haven FL

Iron

Good morning from Scottsdale, AZ

Iron

Slides downloaded; the material on "gotchas" looks valuable.

Good Morning from Mobile, AL

These slides do not have numbers and are hard to follow on the larger images, otherwise, there great.

 

Iron


Partner Zone
Latest Analysis
Advertised as the "Most Powerful Tablet Under $100," the Kindle Fire HD 6 was too tempting for the team at iFixit to pass up. Join us to find out if inexpensive means cheap, irreparable, or just down right economical. It's teardown time!
The first photos made with a 3D-printed telescope are here and they're not as fuzzy as you might expect. A team from the University of Sheffield beat NASA to the goal. The photos of the Moon were made with a reflecting telescope that cost the research team 100 to make (about $161 US).
At Medical Design & Manufacturing Midwest, Joe Wascow told Design News how Optimal Design prototyped a machine that captures the wing-beat of a duck.
The increased adoption of wireless technology for mission-critical applications has revved up the global market for dynamic electronic general purpose (GP) test equipment. As the link between cloud networks and devices -- smartphones, tablets, and notebooks -- results in more complex devices under test, the demand for radio frequency test equipment is starting to intensify.
Much of the research on lithium-ion batteries is focused on how to make the batteries charge more quickly and last longer than they currently do, work that would significantly improve the experience of mobile device users, as well EV and hybrid car drivers. Researchers in Singapore have come up with what seems like the best solution so far -- a battery that can recharge itself in mere minutes and has a potential lifespan of 20 years.
More:Blogs|News
Design News Webinar Series
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 20 - 24, How to Design & Build an Embedded Web Server: An Embedded TCP/IP Tutorial
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: 10/28-10/30 11:00 AM
Sponsored by Stratasys
Next Class: 10/28-10/30 2:00 PM
Sponsored by Gates Corporation
Next Class: 11/11 2:00 PM
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service