Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 2 / 2
David Ashton
User Rank
Author
re: Questions re the concept of "ground" and related "stuff"
David Ashton   5/2/2012 9:19:17 PM
NO RATINGS
I remember a chinese cookbook my mom had when I was a kid. It got round this problem by defining and using "hse" for He/She throughout the book. Quite a neat way round it.

Max The Magnificent
User Rank
Author
re: Questions re the concept of "ground" and related "stuff"
Max The Magnificent   5/2/2012 9:01:07 PM
NO RATINGS
SO... what should a kid say when his parents say “you're grounded”? And what does he say if his hobby is electronics? Think about it...

Max The Magnificent
User Rank
Author
re: Questions re the concept of "ground" and related "stuff"
Max The Magnificent   5/2/2012 8:50:26 PM
NO RATINGS
@"...one that should not be used, even casually between EEs..." Unless they are very close friends ("What happens on Planet Analog stays on Planet Analog")

BicycleBill
User Rank
Author
re: Questions re the concept of "ground" and related "stuff"
BicycleBill   5/2/2012 8:45:49 PM
NO RATINGS
It's not just aircraft or cars that don't have an Earth ground--your latest battery-powered mobile "whatever" doesn't have one either. Like I said, "ground" is a very, very mis-used term and one that should not be used, even casually between EEs, unless you really do have an Earth connection. Sloppy terminology here will lead to sloppy thinking and subsequent problems.

Max The Magnificent
User Rank
Author
re: Questions re the concept of "ground" and related "stuff"
Max The Magnificent   5/2/2012 8:21:35 PM
NO RATINGS
Of course you did :-)

old account Frank Eory
User Rank
Author
re: Questions re the concept of "ground" and related "stuff"
old account Frank Eory   5/2/2012 8:13:36 PM
NO RATINGS
I meant the generic "he" as in "s/he" :)

Max The Magnificent
User Rank
Author
re: Questions re the concept of "ground" and related "stuff"
Max The Magnificent   5/2/2012 7:45:44 PM
NO RATINGS
@"...most of the circuits he will be dealing with..." "He"? Oh Frank, how frightfully un-PC of you ... I can hear the mob approaching your door as I pen these words... :-)

old account Frank Eory
User Rank
Author
re: Questions re the concept of "ground" and related "stuff"
old account Frank Eory   5/2/2012 7:34:56 PM
NO RATINGS
I recall we had a similar discussion about the meaning of "ground" on eetimes.com a year or so ago. There are good arguments for using the name "common" or COM or some such thing, but historically most of us use "ground" and signal names like AGND, DGND, etc. I would tell the student to forget about the whole notion of Earth ground, since it doesn't apply to most of the circuits he will be dealing with, and it really just confuses things. Even in the case where there is an Earth ground connection -- like the electric service panel outside your house -- currents still flow in loops, and the electrons don't just magically disappear into the Earth.

Max The Magnificent
User Rank
Author
re: Questions re the concept of "ground" and related "stuff"
Max The Magnificent   5/2/2012 6:52:03 PM
NO RATINGS
Hi Brian -- As I say, I remember when I was younger trying to find things out -- it amazed me the number of people who wouldn't even respond to an email by saying "Sorry" ... I always make a point of responding, even if the answer is "No, I can't design your final year project for you" :-)

Brian@BDH
User Rank
Author
re: Questions re the concept of "ground" and related "stuff"
Brian@BDH   5/2/2012 6:41:19 PM
NO RATINGS
Hi Max, Thanks for posting these Q&As. I really liked some of Bill Schweber's answers. SNIP ==} Unless you have a connection to earth ground, you should call it “common” Bill is correct. I usually use signal/node names like GND, AGND, DGND, etc. In the future, I think I'll start considering COM notations. Regarding your future responses... SNIP ==} "Ask me your top two questions" I think in the future you should start off by saying "send me a P.O.". Then, let them send all the questions they want! :-) Well, okay, maybe your answer is better for a student. :-)

<<   <   Page 2 / 2


Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Martin Rowe

Leonard Nimoy, We'll Miss you
Martin Rowe
1 Comment
Like many of you, I was saddened to hear the news of Leonard Nimoy's death. His Star Trek character Mr. Spock was an inspiration to many of us who entered technical fields.

Max Maxfield

Awesome 3D Electronic Sculptures
Max Maxfield
10 comments
I recently received an email from someone we'll call Martin (because that's his name). Martin's message was short and sweet. In its entirety it read: "You need to see this!"

Rajaram Regupathy, Cypress Semiconductor

Add USB Battery Charging Protocols to an Android-Based Design
Rajaram Regupathy, Cypress Semiconductor
Post a comment
Editorial Note: Excerpted from Unboxing Android: A hands on approach with real world examples, by Rajaram Regupathy, the author takes you through the process incorporating effective power ...

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
16 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Doug Bailey, VP of marketing at Power Integrations, gives a ...
See how to ease software bring-up with DesignWare IP ...
DesignWare IP Prototyping Kits enable fast software ...
This video explores the LT3086, a new member of our LDO+ ...
In today’s modern electronic systems, the need for power ...
Radio
LATEST ARCHIVED BROADCAST
EE Times Senior Technical Editor Martin Rowe will interview EMC engineer Kenneth Wyatt.
Flash Poll