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Excellent presentation

Iron

Thank you Randy & Alex for informative lecture and presentation.

Iron

thanks sir randy for another great and excellent presentation you have for sensor...hoping another class lesson for sensor part 3 or controllers that would be another great sir!

thanks to digikey and design news for another continuing education. now, i am going to the last class seeion of day 5 of sensor class...

thanks to all colleagues and see you all in the next live class session this coming june 10...bye...

i am now on slide 22, it's near to end the presentation...

i am now on slide 15 of day 4 class presentation...great sir randy!

i am now about to start with slide 2 for sensor education...

i am now downloading the presentation slide for this lesson...

good evening sir randy! here i am again for your day 4 class lesson...

Thank you Randy & Alex for informative seminar.

Iron

Thank you Randy and Alex for another great presentation.  

Iron

It is a fantastic day and age when you are measuring sensor current consumption values in single digit micro-amps.  

Iron

Even more so when you actually look at the board with all the components on it.  

Iron

That is incredible that the micro oscillators still function at 600C.  

Iron

Good presentation, thank you.  A lot of App Notes are available to help with interface issues such as cabling, board layout, PWB design, bypassing and such like.  CMRR also helps a lot.  Device vendors for both sensors and interface IC's have done good work in paving the way.  Realize these are reference designs, mileage may vary ...

Nice presentation, Randy -- thanks!

Iron

Thank you for the presentation.  I thought this presentation was by far the best of the week.

 

 

Thank you for the presentation.

Iron

Slides are informative too.

Iron

great presentations so far.

Iron

Again today I had to listen to this from the archive as I missed the live lecture. Thanks Randy & Alex!

Iron
Thanks for the lecture
Iron

Randy thank you - especially for the TI worlkbench link

Iron

Hello in the evening today

Iron

Thanks for the analog devices link Randy. I had to do the session from archive today.

 

I'll have a look at the signal conditioning info later. See you tomorrow.

Iron

One more item:

The Analog Devices chapter that has great info about signal conditioning is at:

http://www.analog.com/library/analogDialogue/archives/43-09/EDCh%203%20sensors.pdf

Blogger

Another informative presentation.  Thank you.

Iron

That's going to do it for today.

See you tomorrow.

Blogger

Randy: greenfield project: I2C or SPI?

I usually think SPI but you might want to read and see how it applies to your situation:

http://dev.emcelettronica.com/i2c-or-spi-serial-communication-which-one-to-go

Blogger

Do these sensors also have 4 to 20 ma output capability?

None of the sensors I discussed today had the option of 4-20 mA output. From what I know, for a 4-20mA signal conditioner, you have choices from Analog Devices, TI, Melexis and probably a few more to get the 4-20 ma capability (and perhaps then you get a digital output as well.)

Blogger

Thanks, j.wagenaar, good to know.

Iron

I've been able to recalibrate humidity sensors to within 2-3% accuracy using measured values, but its not just a simple offset.  There are calibration devices out there as well but haven't tried any

Iron

Randy: greenfield project: I2C or SPI?

Iron

The interface chips outlined in today's presentation use either I2C or SPI interfaces to the microcontroller. Other than speed differences and the number of pins required, what other considerations drive the chip vendors to select one interface over the other?

While there could be difference that would make one preferred over the other, I think the real answer is suppliers want to satisfy designers with an approach they are most familiar with. If you offer both, you cover a lot of bases.

Blogger

and how much time do you have to perform a single measurement? how fast does the distance change?

Iron

thanks it been a great day

Iron

jackqingz: extremely short IR-Laser pulses? 1m makes things verrry tight for normal MCUs...

Iron

@Randy: Is the memory in the block diagram on slide#2 corresponds to the temporary registers from which microcontroller reads digital values ??

In most cases, the IC itself would use that memory for storing calibration values.

Blogger

What vendors specialize in biomedical sensors? oxygen, blood stuff, anesthesia monitoring?

can you "reset" electronic humidity sensors by calibrating in a few known humidities? Or do they deteriorate in general?

Iron

Thanks, very interesting presentation. Can you mention where these sensors are available from?

Since today's session strictly focused on the sensor singal conditioning no specifc sensors were discussed. Outside of contacting the IC manufacturers, your favorite distributor might be a good palce to start for the ICs.

If you want an idea of sensor manufacturers for various sensing technologies, TI's WEBENCH suggest manufacturers and products once you have selected, temperature, pressure, etc.

Blogger

I gotta go. Tahnk you Randy. E-see everyone tomorrow.

Iron

metal. alum or stainless steel

Iron

Thanks 4Ward537.  I find after a few years, humidity sensors are quite unreliable

Iron

jackqingz: what's the surface of the target you want to measure the distance to? reflective, refractive, transparent?

Iron

I'm curious about the temp. pressure sensor with the MAC90100. Is the sensor also campable of simultaniously sensing both variables?

The pressure sensor is external the temperature sensing is internal and the device must be switched between the two. For the temperature to apply to more than the IC, it must be in close proximity to the sensor.

Blogger

If you want to experiment with gas sensors, take a look at Parallax, Inc - They have a number of different sensors on development boards or as bare sensors

 

Iron

no. tolerance won't meet req if ultru

Iron

If the signal conditioning electronics can't be co-located with the sensor itself can you say a few things about reducing noise on the input lines to the conditioning circuitry?

That where a high common mode rejection ratio value would come into play.

Blogger

jackqingz: are ultrasound pulses possible?

Iron

I missed the audio this time, but the slides have great info too. Thanks!

Iron

any recommedation for gas sensor

Iron

Rnady I'm curious about the temp. pressure sensor with the MAC90100. Is the sensor also campable of simultaniously sensing both variables?

Iron

what is the special function of zsi21013

It handles the signal conditioning for 3 bridge circuits

Blogger

any suggestiong about using a 'timer' senor to measure distance. It's short, less than 1m. tolerance about 0.1mm

Iron

Thanks. If you were conditioning "in post", would you rather keep this in the "main" MCU of the design or use a dedicated "helper" chip for that task?

Iron

Does Maxim make the Gas Sensors ?

Not that I'm aware of. They may have an IC for signal conditioning the output of a chemical sensors.

Blogger

Great tips. I didn't know about the TI tool and AFEs. Those ICs should really make life easier. no more nerve wracking instrumentation amps. Thanks a lot Randy.

Randy: You have shown "signal conditioning" in the analog part of the game. How about "fixing things in post", i.e. in the MCU/DSP?

I should have mentioned that with the capability of MCUs and DSP and DSC these are frequently used and the only thing you need from the analog part is the amplification. The internal ADC and software can allow very precises sensor calibrations expecially if they are each tested to detemrmne the specific calibration variables.

Blogger

what is the special function of zsi21013

Iron

Randy, do you have a recommended source for high accuracy (better than 0.1%) pressure sensors in 5-10K PSI range?

Iron

Thanks! Great presentation!

Iron

Do you suggest any vaiable gain Amplifire?

Iron

thank you Randy and Alex

Iron

Does Maxim make the Gas Sensors ?

Iron

thanks very useful information

 

Iron

Great lecture, very useful

Iron

Nice.  Thanks againa, Randy!

Iron

If the signal conditioning electronics can't be co-located with the sensor itself can you say a few things about reducing noise on the input lines to the conditioning circuitry?

Iron

for aditional info regarding sensor and interfaces material, another good place to look for is  http://www.maxim-ic.com/solutions/sensors/

Iron

Good to learn about today's AFEs.

Iron

Very interesting topic today

Best yet, Randy.  Thanks and looking forward to tommorrow.

Thanks Randy 

I'll hear you tommarrow

thanks for the presentation

Iron

Thank you Randy, excellent presentation.

Iron

Randy: You have shown "signal conditioning" in the analog part of the game. How about "fixing things in post", i.e. in the MCU/DSP?

Iron

Many thanks to Alex for flawless logistics

Iron

good presentation today

Iron

Randy, thank for one more very informative lecture!

Iron

Great presentation, Randy.

Iron

Thank you for todays presentation

Iron

Thanks, very interesting presentation. Can you mention where these sensors are available from ?

Iron

Thanks Randy.. Great ppt..

Iron

 I've implemented an inexpensive humidity sensor, years ago. I didn't experience noticable drift for my precision requirements.

Iron

Thanks Randy, very informative.

Iron

Thanks - Another great class

 

Iron

thanks for the links to products explained.very helpful

Thanks Randy. Great info!

Iron

I'd also be interested in the sensor manufactor on slide 23

National makes it I think

Iron

Who makes those gas sensors in slide 23?

Iron

Do these sensors also have 4 to 20 ma output capability?

Iron

anyone familiar with humidity sensor drift?

Iron

DARK SIGNAL ? WHAT IS IT DUE TO?

Iron

@ MazianLab - if you want to use it diff., you can use it too

Iron

LMP91050 not 71050   

Iron

second capacitive sensor is optional? (@MazianLab)

Iron

@ MazianLab - optional is just C1

Iron

any special function for the 0.1uf capacitor in slide 10

Iron

what does ,ean Optional sensor in slide #15?

Iron

In using the MAS6502 for temp and pressure, are these measurement taken from a single bridge sensor? Does it mean the sensor is subject to both physical variables?

Iron

snandu13 - Effective Number of Bits.

Iron

Is anyone combining a Piezoresistive Sensor Signal Interface IC with a MEMS power generator
(since the IC is only 2.3 uA per second)

Iron

www.zmdi.com (notes section of the slide)

Iron

Who makes the ZNDI Interface?

Iron

Late from a meeting. Sorry for my tardiness.

Iron

yepp, according to Randy

Iron

SiC  - Is it Sillicon Carbide?

Iron

Why do we need Micro Oscillator for sensors??

Iron

Do we need any other drfit elimination for MCP6N11?

Iron

it means the O/P signal will go from almost the Neg rail to almost the Pos rail

Iron

@snandu13: In which signal swings from -Supply to +Supply...

Iron

What  is rail to rail operation?

Iron

@Randy: Is the memory in the block diagram on slide#2 corresponds to the temporary registers from which microcontroller reads digital values ??

Iron

slide 3. (Glad to hear you didn't bleed out yesterday, steve@HA)

Blogger

They are ok so far Alex, thanks for asking!

Iron

It's my radio voice, Reyaz. I'm trying to enunciate clear.

Blogger

Alex, definately too loud up till yestyerday and today

Iron

Hehe, Alex. But your voice is really sharp like a knife.. No offense..

Iron

@jrjohns: My experience boils down to I2X being mre capable (multi-point bus, any node can be master. slave, or both, etc.) but is more expensive in both dies are and time to implement. Also should "register" an I2C to be real I2C.

It is because of the acknowledgement protocol in I2C..

Iron

Thanks, Reyaz.  Yesterday, Steve was complaining I was too close so I tried to back off a bit. Steve@HA, how're your ears doing today?

Blogger

@kenstan - no not all have I2C but most of them has SPI

Iron

I think Alex is bit far from the Microphone.. ;)

Iron

do every microcontroller interface with 12c or spl

 

Iron

Audio is loud and clear

Iron

There goes the audio...

Iron

morning all from sunny miami

The interface chips outlined in today's presentation use either I2C or SPI interfaces to the microcontroller.  Other than speed differences and the number of pins required, what other considerations drive the chip vendors to select one interface over the other?

 

Iron

MazianLab: you can take the audio by reloading the page, if the audio player did not start by itself.

Iron

Alaskaman, did you find an IS encoder that would work?

Iron

Alex, most of the time I receive voice 5 minuts after 2:00 and I miss first parts.

Is it possible give me voice earlier?

Thanks

Iron

good afternoon everyone

Iron

Hi, MazianLab and Kenstan

Blogger

Hello Alex. It seems I am the first one.

Iron

If you get a chance, please join our Digi-Key Continuing Education Center LinkedIn Group at http://linkd.in/yoNGeY

Blogger

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

PPTX viewer here:   http://www.microsoft.com/download/en/details.aspx?id=13

 

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


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