Thanks Max for this valuable presentation.

Thank you Maxfield

Refresher for me after college back in 90s

HW R&D,

Hello to archive from Oregon

In slide 11, the wave form in and the out wave aren't the same. Hopefully if the double conversion is performed correctly, they would be the same. Or is this just an illustration and isn't meant to be scaled, etc. I would also think it would be more complex to design a DAC than a ADC. Yes/no?

thanks for accept my request

okay session.  see you next time.

I cannot see an url

I am an engineer who went into software.  I am getting back into electronics as a hobbyist.

bye.

Take care all and we'll see you next time.

ahh another interesting presentiation from Max.

ready for another rousing lecture

hi all

I am new to the industry. I learned a lot from this part 2. Thanks

Thanks Max Bye

Great story on the mechanical calculator

I just purchased a sound card oscilloscope probe for 25.00 on ebay I'm hoping to use it to look closer at a simple RC circuit for picking the right capacitor

Ive got the slide rule image up

I'm an electronic engineer but make my living with programming interfacing with embeded systems. I'm moving into learning arduino functionality and am building a stronger foundation.

Hello ready for another interesting enjoyable lecture

belated thanks

Thanks Max. Hope we'll get more details on DSP vs DSP in next lectures

Good story of Curta, Max!

There is a Curta calculator display in Computer History Museum in Mountain View, CA.

Finally got the time to catch up on Max's classes!

My name is Harold, and I am a novice. I will be listening and taking these courses

refresher

Referesher familiar with Max and his expertise.

Here are the set:

http://www.clivemaxfield.com/area51/do-not-delete/slide-rule.png

http://www.clivemaxfield.com/area51/do-not-delete/analog-computer.png

http://www.clivemaxfield.com/area51/do-not-delete/z1.jpg

http://www.clivemaxfield.com/area51/do-not-delete/mark-1.jpg

http://www.clivemaxfield.com/area51/do-not-delete/curta.png

look for the http:// values posted by Max in the stream of comments below (first one is about 1/2 the way down)

where is the link that clive said to see in the "chat window"?

where is the chat window?

I'm 63.  Ex-field service repairing medical equipment to componant level.  Now I volunteer at a High School Skills Center helping electronics students.

Viewing your presentation for as a review.

I am a nooby. I have a background in clinical biochemistry but have always had an interest in electronics.

It is an enormously powerfull tool. Edwin S. Katz in hot, humid Houston

where was the link to see slide-rule and computer

i am staying on power point screen.

Thanks Max! I like your approach! It seems that you could add more beef to these segments - you have our interest and then you drop us off - like watching a TV show that ends with a clif hanger! Please request more time, and I was unable to see information in the window. I clixked on HTML and still could not see. I'll update my Flash player and see if that helps. See you tomorrow and thanks again. HCH

Sorry I'm late for class, was working on a project.

I'm using this as a refresher course and to pick up on some missing items.

To answer the question regarding the background of the participants:

FW engineer for high power conversion systems for mainframes with a Comp Eng degree.  Using this as a refresher for the actual HW.

Still updating -- I think we'll leave the rest until tomorrow -- thansk everyone for (a) attending and (b) the kind words -- C U tomorrow -- B there or B square :-)

isn't it funny that the faster the technology goes the more time we spend waiting for it...   (I'd put a smiley, but I'm not sure I'm joking...   :)

no I did not see

I will have to go, and will be back tomorrow. Tchau! 

can not see

@MAX, I know the feeling. This interface has its shortcomings. Same thing happens if you loose the connectionb and have to reload the page.

how do you capture the 15 to 30 Hz signal easily?

I'm really sorry about this -- now I'm up to th emessages saying what everyine is doing, like looking for a refresher course or being a student -- this could take ages before I'm caught up -- I think we'll have to leave it until tomorrow  -- so if you have any questions from today's course -- post them here and I'll read them later and i'll try to answer them tomorrow

Ah ... now I'm seeing the message from folks saying that they are seeing the first image I put up -- give me strength!!!

:)

hey max 1 Q

how to track the low frequency signal(15 to 30 Hz) from beneath the ground surface accurately?

We use pig transmitters that emit low frequency signals and a receiver is supposed to accurately track that signal but our receiver catches any undesired low frequency signal which is not necessarily the one from the transmitter. What is the ideal way to get rid of this problem?

see you soon

Max,

The analog Computers that I've worked with used a transistorized chopper drive circuit to sample the input signal before either differentiation or integration signal conditioning, or processing.

:)

@#$%$ Computers :-)

bye for now

good day to all

thanks

thank you

good info

Time to go..see you tomorrow.......................................................................................................................................................

@You will have to be patient with me -- I lost my broswer and now I'm back it's refreshing every message ... one ... at .... a ... time .... it's painfully slow -- I'm still seeing the oribginal ones saying "hi" -- give me a minute or two ...

How does band width of MSO relate to clock speed of mpu or mcu in sut? e.g. if using an mcu at 100MHz, what is the minimum bandwidth mso i can use to get a clear picture of what's happening in the overall device? Thanks.

OK I'll stop asking you about sampling and Fourier coefficients.

That was me. Will do   Thx
AGAIN  
Can I have ONLY Max or the moderator answer this PLEASE !!!!!!!!
The link given earlier for "Analog Computer"  http://bit.ly/MFRTkM   does NOT work
This redirects to    http://www.clivemaxfield.com/area51/do-not-delete/analog-computer.png      and there is only a placeholder for the image.
ALL other links worked.

I just messed up my browser and lost all the messages -- re th eperson who can;t see that analog computer (or any of the images) -- email me directly at max@clivemaxfield.com and I'll email you back the image

So when do they bring back acoustic couplers :)

Refresher course

Are you still there, Max?

back to sampling frequency and number of bits per sample..how do they relate to the coefficients in the Fourier series for the waveform?

@"I saw one for sale a couple of months ago. $65K"

You are kidding me! That must have been one from the second world war -- mine is post-war (they were used by companies to encrypt messages for at least 10 years after the war)

hey max 1 Q

how to track the low frequency analog signal(15 to 30 Hz) from beneath the ground surface accurately?

AGAIN  
Can I have ONLY Max or the moderator answer this PLEASE !!!!!!!!
The link given earlier for "Analog Computer"  http://bit.ly/MFRTkM   does NOT work
This redirects to    http://www.clivemaxfield.com/area51/do-not-delete/analog-computer.png      and there is only a placeholder for the image.
ALL other links worked.

Re ENIGMA:  just like an old teletype, mmm.

I do believe we have a full hour of audio, can you please let Max speak the full hour. Thanks, Max Mott

Re the ENIGMA Machine -- when you open the case on mine you still get that "machine oil" smell

back to sampling frequency and number of bits per sample..how do they relate to the coefficients in the Fourier series for the waveform?

http://www.youtube.com/watch?v=HYsOi6L_Pw4 CURTA instructions!!!

$50 Logic Analyzer?

This ???:

http://www.seeedstudio.com/depot/open-workbench-logic-sniffer-p-612.html

Here's a link to the Red Hot Chili Pipers http://www.youtube.com/watch?v=OwrvHnYpwkk

got a couple of USB temperature sensors to track temps while I burn-in Xboxes after repairing 'em

THANKS MAX

Re the $50 logic analyzer -- thsi is FPGA-based -- remind me on that day (I think we're doing thsi on Thursday) and I'll get you a link to their website

http://www.youtube.com/watch?v=HYsOi6L_Pw4

@PCB Jack" Don't talk to me about temperature sensors -- if you are not careful I will be ranting and raving for hours!!!

I would really like to see an ENIGMA machine without going to Bletchley Park (but will go one day, too much history to resist).

I am interest the $50 logic analyer. Please let us know! Thanks!

Where do  you guys get an Enigma machine?  I saw one for sale a couple of months ago. $65K

hold a match (unlit of course) between your teeth when chopping onions...NO CRYING

UNLESS LIT!

How does band width of MSO relate to clock speed of mpu or mcu in sut? e.g. if using an mcu at 100MHz, what is the minimum bandwidth mso i can use to get a clear picture of what's happening in the overall device? Thanks.

Max has single-handedly raised the prices of Curtas today, now that they are in greater demand!

Max IS an Enigma

Q: What's the similarity between throwing the javilin and playing the bagpipes?

A: You don't have to be very good to get noticed!

hold a match (unlit of course) between your teeth when chopping onions...NO CRYING

Very interesting Max - as usual

You have an ENIGMA too!

Thank You Max

Need to get me a CURTA for Christmas, Thank you Max & Digi-Key. 

Thanks Rich, Max, and everyone.

Garbage In, Garbage Out (re: I have a temperature to voltage converter which is an unstable analog signal, question is how do we convert that to a stable digital signal?)

Great, some background music for us

before the lecture starts to remind me

to turn on the sound / amplifier / spkrs...

Re: "I googled CURTA and found sale prices between 2k to 8.5k !!!"

Don;t get me started about the ENIGMA machine I have in the corner of my office

if you chew gum while chopping an onion, you wont cry

Q: what's the difference between playing a bagpipe and swinging a cat?

A: People like cats.

come on.... bagpipe joke 2 please!

aw, Max, that's mean!   poor bagpipes...     and if you use sharp (*sharp*!) knives, you won't cry when cutting an onion...

thanks Max, Rich and DigiKey...see you tomorrow

EVERYNE: who was the host today? Perhaps the name is in front of my eyes and I don't see it.

Re the question on talking about dynamic range in dB ... that's a bit beyond the scope of this introductory talk

is the sound of a bagpipe digital or analog?

loooooool. max is too funny. awesome lecture

This is great. Glad for the archive. Thanks.

Great session. Many thanks.

Neat story on the Curta

I googled CURTA and found sale prices between 2k to 8.5k !!!

I have a temperature to voltage converter which is an unstable analog signal, question is how do we convert that to a stable digital signal.

Thanks Max

Max, thank you - this was a wonderful class!   And love the stories!

Max:

what is the relationship between the number of bits used in quantization, and the coeficients in the fourier series?

Bagpipe Joke #1

Q: What's the difference betweeen chopping up an onion and chopping up a set of bagpipes?

A: Nobody cries when you chop up a set of bagpipes! :-)

Thanks

was not able to retrieve url

See you tomorrow. Thanks!

Thanks Max - Enjoyed the memories

Thanks Max.

Thanks Max!

Thanks Max and Rich. See all tomorrow.

THANKS MAX...FROM MEXICO

Thanks Max.

 http://bit.ly/MDVou1

Good presentation

Thanks Max and Rich as well as Digikey.

there are quite a few Curta calculators on ebay - ranging around $1000; many higher, a few lower

Thank You Max

thank you Max,

question: touch upon large dynamic range handling in dB?

Thanks

Thanks for the session today, Max.

curta

What is the URL for that calculator?

great story!

@MAX: This is an amazing holocaust story to learn about.

vai corinthians!!!

electronics engineer refresing to enter into electronics industry

WHAT ABOUT THE ABCUS???

eBay has Curta calculators!

Thank you

Max - love the URL -   .../area51/...    :)

Thanks Max!

Digikey actually sells a Logicstudio16 from LeCroy that plugs into a laptop.

Thank you, great presentation, keep them coming!

Thanks Max.

Excellent once again, Max.

Thanks too, was a presure!

Thank you!

Thank you, see you tomorrow

Thank you

Wow... just looked-up Curta on eBay... it goes for ~$1300.-

Thank You Max.

Love the Curta...  I've got both a Curta series I and II.

Great job, Max, very interesting!

Thanks Max!

thank you

Excellent

great presentation

GREAT...  GIVE US MORE!!!

Thank you for today's presentation Max

Thanks

Thank you so much for your excellent presentation!

Thank you Max, another great presentation

*much* faster (not *must* faster)

Thank you Max

Thanks Max, It's very great pt.

Thansks, Max

Review, Electronics Engineer

THANKS MAX!

thk you max!

Thanks Max!

Great Pres.

@richnass: speech must faster than typing :)

Max, thank you for a great lecture!

yes, curta!

thanks Max

Curta Handheld Mechanical Calculator http://bit.ly/MDVou1

@Max: yes, the Curta! and the bagpipes. Not out of time!!!

Thanks again be back tommorrow

Thanks MAX

Any industry samples for usage of the IPAD signal application?

what is the relationship between the number of bits used in quantization, and the coeficients in the fourier series?

Thanks Max!

NI also announced the iPhone based Apps.

@Max - tell me the story of the Curta.  And how William Gibson knew about them (_Pattern Recognition_)

Max - thanks!   That'd be fun to play with..

If we have an unstable analog signal how do we convert that to stable digital signal?

First mechanical computer? http://www.antikythera-mechanism.com/

thanks Maz... congratulations... see you tomorow!

thanks

How does band width of MSO relate to clock speed of mpu or mcu in sut?

@richnass: Just go to the oscium.com web site and take a look.

Not expensive at all! Go look at the cost of any half decent osc.! I personally purchased an academic grade osc. for the Apple two in 1984, and it cost me US$750!

http://oscium.com

5MHz bandwidth only, a bit on the low side

It's the hardware that is important

Use a MPC555 from freescale

I've seen a FPGA-based DIY scope

There is information on similar scopes at www.scopejunction.com in discussions of USB scopes and such.

FPGA analyzer - how many channels?

sweet!   a real reason to buy an iPad...   :)

or frequecy range or response?

wow, thats a great toy  for an ipad

what is the App called?

what is the spec for that device?

Oh my gosh--is that a Tektronix 535 on the right?  Memories, memories. . .

It works for me LinRJo

i have one here!!! =P

The link given earlier for "Analog Computer"  http://bit.ly/MFRTkM   does NOT work

:)

@gordonmx - good one...keep them coming

@MAX: Sorry, I meant PARABOLIC.

Nemos - samples on horizontal are the digital value for that sample - not time value  (else it'd be 000 001 010 011 etc)

I had a friend who was addicted to brake fluid.  He told me not to sorry, he can stop any time.

@MAX: Do you know why didn't they use a aprabolic reflector with a single microphone in its focus?

Screen out all the other speaker?

That would be great for debates. ;-)

@Nemos..they all looks correct to me as well..those values are signal range or value..it is not graph value or incremental of axis.

The markers on the x-axis aren't describing the time, they're used to say what the digital value of the wave is at that point in time.

Slide 16 depicts what was/is called "tremolo" (varying amplitude) as opposed to "vibrato" (varying pitch). Think surf music.

101

in the time domain

after 100 is 110

@MAX: all I got was to the 

The Acoustic Hell Band Project

yes Alan there are some errors

Nemos - which number do you mean?   (which horizontal one?)  they look correct to me

what is the relationship between the number of bits used in quantization, and the coeficients in the fourier series?

In the telecom world, analog signal is "sampled" every 8,000 times per second X 8 times = 64,000 or the famous 64K

I think that represented a T1 and a phone conversation.  I might need some help on that.

hot hot chili pipers?

Oh god

@Nemos: not sure what you mean -- which 4 on what part of what slide is presented as 111, and why should it be 101?

Though, I'm an MA in Comp Lit, so... my understanding is... let's say "elementary"... to be kind to myself...

@luizcosta: thanks for the info! :) I'm just remembering my physics course which attempted to be taught as both Algebraic-based and Calculus-based at the same time, and certain things seemed better fit to one or the other...

Max, is a Amplifier involved in the A/D processing?

@MAX No I never really hear any lies, YET! ):o

the 4 should be 101 instead of 111

http://www.designnews.com/archives.asp?section_id=1636

is the link for the archive courses

@JOSEPH: I beg to disagree with the analogy, for in both worlds of analog and digital (continuous and discrete math) algebra and calculus are equally applied.

Does this course qualify for a PDH for a PE license?

Good afternoon, everyone

@dfruges - yes, you can access all past presentation in the archive link at top of page

yes, all classes are available in the archives

audio is available soon after class ends  (hour or so?)

If we miss a 2:00 PM class any day this week -- is the class recording available for listening at a later time?

http://www.computerhistory.org/revolution/analog-computers/3

It seems like a preference for one over the other would be analogous to a preference for calculus vs. algebra...

get the images from the URL Max has posted in this chat...find them below in the chat...

Max, if you still are not a grandfather, you will be a wonderful one; full of stories to tell.

classic haven't seen one since college

@Max - tell me the story of the Curta.  And how William Gibson knew about them (_Pattern Recognition_)

long delay... no link yet

where is the place for getting these images??

Max, we go back to the beginning of all this

dont confuse analog or early computers with OEM (off line electronic machines) which processed punched cards. a different machine for different functions such as: sorting, printing, merging, calculating

Curta - that's cool!

never seen one

Hi from Ohio

Curta Handheld Mechanical Calculator http://bit.ly/MDVou1

You have to cut and paste from his post...

http://bit.ly/SSfQIz

Not really that big covered the side of my dads work shed.

I remember my dad bringing home the analog computer patch panels and programming them in the evenings to get the jump on the next day's work.

I can not see what you post.

Harvard Mark 1 Relay Computer http://bit.ly/SSfQIz

how do you get theURL image?

wow!!   that's *awesome*!!   how big was it???

sweet

I see it

Build my first analog Computer in 68.

wow!

Refresher

neat pic

I used punch cards but nothing that looked like your picture

Old meaning of the "Computer Room"

Electrical Engineer Intern

That's why I flunked my first computer course

@max - can see the analog computer

a little larger than my laptop

Just like down in the basement.  Use it to warm the house in the Winter!

Z1 Mechanical computer http://bit.ly/MkT9ZP

I see it

wow... that's old school!

Max, you and I are eaqually young!

Sorry dealing with the bane of the digital world email while listening.

Yes it is there.

Good afternoon folks.

I see it

Analog Computer http://bit.ly/MFRTkM

yes

slide roler

calculator? only in my 3rd year of engineering school.

still have Dad's old bamboo slide rule.

Some of us are here.

Yes, I can see it.

looks good, i missed using one by 5 years

(I actually have a slide rule on the bookcase behind me!)

YES slide rule

si si yes

Yes I dont see it

Ya!

I get a blank screen

looks a lot like an analog calculator to me.

Can see the pic fine

Yes I see it!

I see it

Works for me - a slipstick

yepp - the link works

slide rule

I see the slide rule!

looks like the slide rule i have at home

Yes, I have it

yes

can see it

yes

yes

yes, we can see the sliderule

I see it

Cant see it

Thats not a K&E is it?

yes

Yes, got it

got it!

yes

i see it

see it

I see it

Yes

yes see slide rule

visible

I saw it

@max - yes can see the slide rule

good grief!!!  a slide rule!!!

Yep, it's there

Yes, I can see it... brings back old memories

I see it

i can see it

slide rule

got it

@Max: I can see the image of the slide rule.

I see it

I can see it

got the image

Loads fine.

works

i can see it

got it

Looks good

Yep.

I see it

yup

Slide Rule http://bit.ly/Qht4Ry

(re reading the slides)   YES!   I hate lectures like that too!!   (thanks for not doing that!)

Remember, if you have a technical problem, send an email to support@designnews.com

engineer hw/sw/fw

@garysxt.... I appreciate your initiative

Loged in QaPro

Engineer, Refresher

College Student: mostly a refresser but learning some of the finer points.

intrested in DSP

Engineer HW and SW

I have a strong electrical background but week on electronics.

Engineer, refresher

Engineer of >30 yrs. Enjoyed Max's lectures previously and wanted to join in again.

and enjoying Max's lecture.

Hello All, I Am Electrical Engineer, refresh knowellage is good

refresh - update!

Engineer, hopping over from programmableplanet.com, just because I'm a Max fan.

product engineer and this is refresher

This is a refresher course. But I may decide to build a device in the near future.

Embedded systems engineer.  Refresher.

Engineer...Refresher

Just a Refresher

Hobbyist, amateur radio and by day a systems administrator (IT)

1st yr drafter (currently in eng school, but freshman level) = NOVICE!!!!

using as a refersher course.

Refreshing

enginneer

just here for the English accent (smile)

Hey, from Tucson. Review for in job.

I am a non-degreed engineer specialized in analog design and some digital design. Most of my career was in testing.

I'm waiting for the later parts where FPGAs and the various digital logic families are discussed. I'm an experiance designer and physicist.

Engineer - looking for good ways to relate info to newbies.

@rich - enjoy all the DigiKey presentations - EE want to be

Refresher course

new

some is a refresher looking to learn something new

I'm sitting in because Max is so entertaining. My professional carreer in electronics began in the 70's with tubes (valves for Max). tubes. Have been designing analog, digital and embedded control systems.

engineer refresher

@richnass: semi-refresher, semi-fill-in-the-gaps

i'm a software guy who did hardware 30 years ago when in the us navy and immediately thereafter. i'm getting back into hardware largely because of the arduino. i

yes I am an experienced mechanical engineer and i'm looking for some electrical education/refesher

Engineer, need to refresh

mostly refresher

engineer, mechanical converting to electrical

I am a newby in terms of understanding electronics as a field itself, but familiar with its applications used in the HVAC engineeringfield

How can I see the slide? document?

Dom Fruges -- I am a marketing professional who has worked in the tech world.  So, I'm not a "hands-on" engineer or tech person.

I'm a Corp. Comm. Specialist (public relations) and routinely write press releases about electronic components. Definitely learning for the first time.

MC embedded

Ima nub

And I will post using invisible ink.

i am a software engineer and want to get some electronics background

30+ years of design engineering, good refresher

I'm software, but have played with hardware for a long time (back to building an Imsai 8080, etc)

Refresher, and to see a different perspective on things.

Novice, in marketing field.

Engineer refreshing knowledge I _should_already know.

amateur with some embedded development experience - 12 years ago

Electrical Engineer... never to old to learn!

Engineer, just refreshing and enjoy listening to Max

engineer, refresher

BSEE hanging on every word Max speaks!   :)

I am engineer taking this course as a refresher course.

Design Engineer...Refresher

refresher

Enginerd... refresher

Engineer, refresher

Learning for the first time

refresher

Engineering technician, using it as a refresher

Medium- hobbyist, engineer, but i don't design electronic cirucuits professionally

project manager, no engineering background but surrounded by electronics and engineers

Capturing not for me, but to pass on to others who are novices.

Mechanical Engineer, using as refresher and to expand my understanding of electronics.

Engineer teachimg grad school systems engineering

In case you didn't hear the beginning, download the slides from the link above "Today's Slide Deck"

I'm totally green.

refresher

using this as a refresher course

I just love hearing Max talk

This is a refresher course for me, essentially continuing ed.

Novice.

Engneer, refresher, and fun with Max.

Hi form Vancouver island

i'm a complete noobie

Refresher

@Rich - yes, I'm an engineer and use this as a refresher... and really enjoy listening to Max

Novice, learning this "for the first time"... (my HS Physics class shouldn't count...)

I am a control systems engineering looking for a refresher

Refresher

engineer, refreshing

Refresher

the sound is too Low

I'm in grade 12.

Engineer... refresher course