Suggestions for Fundamental Friday

[EEVblog]

I would like to see Dave do a video about why anyone ever needs 5 or 6 digit accuracy for a multimeter.

I was going to do something very simple along those lines, although for "resolution", not so much the accuracy part.
It won't be a FF video, just a real quick simple video. Yep, could do this one in a few minutes.
Ok, maybe 5 minutes...

[casper.bang]

Love FF stuff, especially as presented by Dave with theory followed by a breadboard setup - great for a rainy day while on vacation.

How about the topic of hysteresis? I noticed it came up in Dave's latest multi-meter review, and I would not have known what it was, if I had not just been playing with ADC and battling the problem of "fast switching between two close states".

Switch latching/de-bouncing could be another fundamental topic. There's a software aspect to these problems, so may be a little harder to cover, though unavoidable when BOM reduction is a concern.

[Mr Smiley]

Hi,

What do almost all newbies and seasoned designers hide from. 

Impedance matching using transformers, or for that fact, impedance matching full stop 

a X:1 transformer wound on a toroid, explaining what the load sees and what the source sees.

Simple,easy to do, easy to demonstrate, but very frightening for a lot of people

 

[duskglow]

uC clocking, crystals, load capacitors and such would be an awesome tutorial.

I second this.  I'm trying to figure out what the best way to hook a crystal to an AVR is.

[jonwilhelmjr]

I would not mind seeing a video about filters for example RC filters. How many are they? Maybe Dave can do a series like he did with the charge pump and voltage double videos.

[rakesh]

feedback loop stability? its not really as fundamental, but a topic not many of us understand, and very important in most circuits...

e.g. pole and zero compensation, bandwidth limiting, etc,.

+1   

+20 

+1

[ddavidebor]

I would not mind seeing a video about filters for example RC filters. How many are they? Maybe Dave can do a series like he did with the charge pump and voltage double videos.

Boooooring!

[kizzap]

Boooooring!

and so is your negativity.

-kizzap

[Excavatoree]

I know a "datasheet" video has been proposed before, and I know Dave has shown some datasheets on previous videos and explained how to use one to understand a component, but I was thinking of a slightly differing idea.

It may be helpful to do a series of videos on some basic components:  Diodes, transistors,  basic op amps,etc.  Show the data sheet, explain the important specs, and maybe give an example of why one can or can not substitute component A for component B, and why or why not.  (some cases are circuit dependent.)

[Rerouter]

while i see that as a good topic Excavatoree, each of those components would really be worth there own video, there is a lot of things even at a fundamental level about a resistor for instance, temperature coefficients, noise, capacitance, winding patterns, materials, wattage, drift, breakdown voltage, etc,

[Excavatoree]

while i see that as a good topic Excavatoree, each of those components would really be worth there own video, there is a lot of things even at a fundamental level about a resistor for instance, temperature coefficients, noise, capacitance, winding patterns, materials, wattage, drift, breakdown voltage, etc,

That's what I meant.  Maybe one a month or so.  "Fundamentals Friday - Resistors." for example, discussing the aspects you mentioned.

[Kjelt]

Maybe designing and choosing the right components (which have their quirks), for instance like a standard ceramic X7R vs NPO SMD capacitor, capacitance derating (Voltage and Temperature Coefficient, last year this got even the pros at our company in trouble.

[helge]

Clock/frequency generation, especially PLL-based!
Be it in FPGAs, Microcontrollers or even in that bloody 74HC4046- based tesla coil you built over the weekend - we cannot hide from it. I'm currently digging into this subject for a project that implements a serializer with fine adjustable bitrate. PLL clock synthesis in particular is a whole world in itself. After Dave has tackled FPGA basics and JTAG in some videos I am confident he won't crumple in the face of sigma-delta fractional-N synthesis ;-)

Here's some stuff to get started:


http://www.skyworksinc.com/uploads/documents/101463b.pdf
http://www.ece.ucsb.edu/Faculty/rodwell/Classes/ece218b/notes/MTT_2004_meninger_IntNFracN.pdf

[george graves]

uC clocking, crystals, load capacitors and such would be an awesome tutorial.

+1

[TMM]

I know it has been covered before (in one of the Agilent multimeter teardowns, i think?) but perhaps a more comprehensive tutorial of integrating ADCs.

[helge]

I know it has been covered before (in one of the Agilent multimeter teardowns, i think?) but perhaps a more comprehensive tutorial of integrating ADCs.

Let me start by adding a helpful piece of information:
http://www.latticesemi.com/~/media/Documents/ApplicationNotes/AnalogLayoutandGroundingTechniques.ashx?document_id=1116

[ShaunAndFRED]

I think one that would be great for FF is isolation. Why certain systems are isolated vs not, maybe even get into creepage distance and pcb slotting.

[awallin]

I think one that would be great for FF is isolation. Why certain systems are isolated vs not, maybe even get into creepage distance and pcb slotting.

I suggest: "how not to kill yourself with a variac"

[con-f-use]

Wasn't aware this thread exisited. Howto not kill yourself with a variac is kind of similar to what I'd like to see, a general tutorial on mains safety with focus on equipping your lab for mains safety.

General vicinity:
Isolation Transformars
RCD
Variacs
Mains Filters
UPSs
Emergency Shutdown Switches
Fuses

[codeboy2k]

Wasn't aware this thread exisited. Howto not kill yourself with a variac is kind of similar to what I'd like to see, a general tutorial on mains safety with focus on equipping your lab for mains safety.

General vicinity:
Isolation Transformars
RCD
Variacs
Mains Filters
UPSs
Emergency Shutdown Switches
Fuses

+1 voted up

[Syko_]

Just throwing this in there, for what-the-heck-ness.

Hysteresis losses and Eddy current losses?