Eddie Currents

[bitrex]

On 10/16/19 12:45 AM, Robert Baer wrote:

bitrex wrote:
On 10/14/19 11:11 PM, jlarkin@highlandsniptechnology.com wrote:
Sounds like a minor mobster.

https://www.electronicdesign.com/analog/11-myths-about-inductive-position-sensors


See Fig 1.

I remember when Electronic Design often made sense.



Eddie Currents possibly associated with the notorious Eddie Coyle:

https://www.youtube.com/watch?v=vWdqoPHW-F8



  Not playable.

<https://www.imdb.com/title/tt0070077/>

<https://en.wikipedia.org/wiki/The_Friends_of_Eddie_Coyle_(novel)>

 

[bitrex]

On 10/16/19 12:45 AM, DecadentLinuxUserNumeroUno@decadence.org wrote:

Robert Baer <robertbaer@localnet.com> wrote in
news:unwpF.57464$O_.53958@fx39.iad:

bitrex wrote:
On 10/14/19 11:11 PM, jlarkin@highlandsniptechnology.com wrote:
Sounds like a minor mobster.

https://www.electronicdesign.com/analog/11-myths-about-inductive-
position-sensors


See Fig 1.

I remember when Electronic Design often made sense.



Eddie Currents possibly associated with the notorious Eddie
Coyle:

https://www.youtube.com/watch?v=vWdqoPHW-F8



Not playable.



You still on a 9600 baud modem, boy?

You tryin' to tell us that you have never played a video on the
youtube site? 'Cause that is where that one is, and they are all the
same format.

He needs the text version I guess:

<https://en.wikipedia.org/wiki/The_Friends_of_Eddie_Coyle_(novel)>

 

[Clifford Heath]

On 16/10/19 6:19 am, John Larkin wrote:

On Tue, 15 Oct 2019 10:41:41 -0700 (PDT), Lasse Langwadt Christensen
langwadt@fonz.dk> wrote:

tirsdag den 15. oktober 2019 kl. 19.27.03 UTC+2 skrev John Larkin:
On Tue, 15 Oct 2019 17:01:09 +0000 (UTC),
DecadentLinuxUserNumeroUno@decadence.org wrote:

jlarkin@highlandsniptechnology.com wrote in
news:5vsbqeh2g8jddc05jb0g7omjvlj11t4u93@4ax.com:

On Tue, 15 Oct 2019 10:58:56 -0500, amdx <nojunk@knology.net
wrote:

On 10/15/2019 8:59 AM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 15 Oct 2019 01:20:02 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 2019-10-14 23:11, jlarkin@highlandsniptechnology.com wrote:
Sounds like a minor mobster.


Where have you been? Eddie Current is famous for inventing the
LVDT : "Linear Voltage Displacement Transformer", according to
the article.

https://www.electronicdesign.com/analog/11-myths-about-inductiv
e-position-sensors

See Fig 1.

I remember when Electronic Design often made sense.

Most recently around 1995, iirc.

Cheers

Phil Hobbs
(Who BITD learned a fair amount from ED, EDN, and especially RF
Design.)

I thought you might enjoy the single-winding transformer and its
interesting field lines.


I am assuming you noticed that half of the lines of force are
drawn
incorrectly? Or did my 11th grade electronics course fail me?

They cancel to zero field at the center of the coil.


It looks like two turns on the primary, and I wish they had
shown the
secondaries.

It's a transformer. It doesn't have secondaries!

On the electric vehicle, how well is a compass going to work?
Ask
just to say I once had a dash mounted compass, I had to cross a
bridge to and from work, When I drove at 40mph across the bridge,
the compass would make a full 90* swivel before coming back to
proper orientation.
If I went faster it didn't quite make the 90*.
Mikek





The compass in my Audi rear-view mirror usually works pretty well,


That is where the readout is. Most likely it is coming from the
GPS in the car and getting piped to the mirror via BT or wires along
with the power. There is a chance that they put a compass cicuit in
the mirror, but it makes more sense to use the GPS as conflicting
outputs might get noted.

Does GPS give compass direction? How does that work?


I don't see how unless you have more than one antenna and calculate from that



but a steel bridge might mess up any magnetic compass. There is a
drive-in-circles cal procedure that I haven't tried.

Your audi have a map display? If so, I would bet the mirror is
just reading out what that gathers.

Yes, it has GPS and map. But how does it know direction?

probably with one of the numerous 3 axis magnetic sensor ICs


GPS can determine compass direction if the car is in motion, if GPS
tracks its location, and you assume the car is pointed in the
direction that it is going.

I doubt anyone has actually done that.

Strictly speaking the GPS returns heading, not bearing. Bearing is where
you're pointed, heading is where you're going (only meaningful *if*
you're going).

The GPS heading lags behind by a few seconds, which is an issue in our
vehicle-based radio direction finding hunts, where we add the GPS
heading to the antenna rotator angle to get antenna bearing. On a twisty
road, the bearings veer all over the place. It needs an IMU
(accelerometer, compass) for correction.

CH

 

[Clifford Heath]

On 17/10/19 4:47 am, Steve Wilson wrote:

John Larkin <jlarkin@highland_atwork_technology.com> wrote:

On Tue, 15 Oct 2019 20:30:45 -0000 (UTC), Steve Wilson <no@spam.com
wrote:

John Larkin <jlarkin@highland_atwork_technology.com> wrote:

GPS can determine compass direction if the car is in motion, if GPS
tracks its location, and you assume the car is pointed in the
direction that it is going.

I doubt anyone has actually done that.

I think that's how my Garmin works. When I start my car and move a few
feet, it knows exactly which direction to steer to get on track to my
destination.

Very simple idea, actually.

What if you start in reverse?

You are not allowed to drive on roads in reverse.

That's not true in Australia. You can drive as far as you like in
reverse, but you must be on the correct side of the road for the
direction you're traveling, not the direction you're pointing. Actually
reversing up the same side is only allowed for a short distance (30m,
100m, I'm not sure).

CH

 

[Clifford Heath]

On 16/10/19 9:20 am, DecadentLinuxUserNumeroUno@decadence.org wrote:

And Google maps is 100% reliant on GPS as it relates
to showing you where you are at.

This is incorrect. It also uses the SSIDs of any WiFi it can hear (and
uploads them to Google with GPS coordinates), if you allow it to (the
default).

I use a GPS phone app to get the precise time to set my mechanical
watch. It can take quite a long time to get a fix (minutes) on occasion,
yet I never see artefacts of that delay in Maps... so there is other
majick going on as well.

CH

 

Clifford Heath <no.spam@please.net> wrote in
news:YNOpF.191243$kQ.113300@fx40.iad:

On 16/10/19 9:20 am, DecadentLinuxUserNumeroUno@decadence.org
wrote:
And Google maps is 100% reliant on GPS as it relates
to showing you where you are at.

This is incorrect.

Not really. If your phone has GPS, that is what it uses. Your
method was the way they did things before GPS was fully incorparated
industry wide.

It also uses the SSIDs of any WiFi it can hear
(and uploads them to Google with GPS coordinates), if you allow it
to (the default).

Well, it can be off by as much as 100 feet when I am clearly not
there, but then it updates. And oh, my wifi is OFF.

The McDonalds app is so bad it does not even know I am standing in
the store sometimes.

I use a GPS phone app to get the precise time to set my mechanical
watch.

Your phone gets set by GPS so, you can rely on the phone time
readout. But your app give seconds resolution. Still, you are the
one hitting the start button on the watch, so you will never get
better than 200ms accuracy on the best day.

It can take quite a long time to get a fix (minutes) on
occasion,

The app sounds like it was meant for USGS least squares topo map
benchmarking.

There are apps that resolve way faster to the number within 1ms,
and you cannot strike the button without anticipating it and get that
accuracy level. IOW, major overkill.

yet I never see artefacts of that delay in Maps... so
there is other majick going on as well.

Or you presume to know what is going on.

Likely depends on the app and the phone both. And where you
actually are.

CH

 

[amdx]

On 10/15/2019 12:31 PM, amdx wrote:

On 10/15/2019 11:33 AM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 15 Oct 2019 10:58:56 -0500, amdx <nojunk@knology.net> wrote:

On 10/15/2019 8:59 AM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 15 Oct 2019 01:20:02 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 2019-10-14 23:11, jlarkin@highlandsniptechnology.com wrote:
Sounds like a minor mobster.


Where have you been?  Eddie Current is famous for inventing the LVDT :
"Linear Voltage Displacement Transformer", according to the
article.

https://www.electronicdesign.com/analog/11-myths-about-inductive-position-sensors


See Fig 1.

I remember when Electronic Design often made sense.

Most recently around 1995, iirc.

Cheers

Phil Hobbs
(Who BITD learned a fair amount from ED, EDN, and especially RF
Design.)

I thought you might enjoy the single-winding transformer and its
interesting field lines.


  I am assuming you noticed that half of the lines of force are drawn
incorrectly? Or did my 11th grade electronics course fail me?

They cancel to zero field at the center of the coil.


  It looks like two turns on the primary, and I wish they had shown the
secondaries.

It's a transformer. It doesn't have secondaries!

What is this referring to, first sentence below image #1.
"Two secondary coils are used to detect this magnetic field, and just
like with a transformer, we use Faraday's law to convert this field into
a voltage."

Did I ask a stupid question or is it a hard question?

Mikek

 

On Tue, 15 Oct 2019 12:31:14 -0500, amdx <nojunk@knology.net> wrote:

On 10/15/2019 11:33 AM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 15 Oct 2019 10:58:56 -0500, amdx <nojunk@knology.net> wrote:

On 10/15/2019 8:59 AM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 15 Oct 2019 01:20:02 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 2019-10-14 23:11, jlarkin@highlandsniptechnology.com wrote:
Sounds like a minor mobster.


Where have you been? Eddie Current is famous for inventing the LVDT :
"Linear Voltage Displacement Transformer", according to the article.

https://www.electronicdesign.com/analog/11-myths-about-inductive-position-sensors

See Fig 1.

I remember when Electronic Design often made sense.

Most recently around 1995, iirc.

Cheers

Phil Hobbs
(Who BITD learned a fair amount from ED, EDN, and especially RF Design.)

I thought you might enjoy the single-winding transformer and its
interesting field lines.


I am assuming you noticed that half of the lines of force are drawn
incorrectly? Or did my 11th grade electronics course fail me?

They cancel to zero field at the center of the coil.


It looks like two turns on the primary, and I wish they had shown the
secondaries.

It's a transformer. It doesn't have secondaries!

What is this referring to, first sentence below image #1.
"Two secondary coils are used to detect this magnetic field, and just
like with a transformer, we use Faraday's law to convert this field into
a voltage."

Beats me. I only see one coil with opposing field lines. It wouldn't
induce signal into secondaries if they did exist.

And LVDTs aren't eddy-current based. The moving core is ferrous and
*increases* coil coupling.



--

John Larkin Highland Technology, Inc

lunatic fringe electronics

 

Robert Baer <robertbaer@localnet.com> wrote in
news:5T2qF.157775$LG2.101042@fx48.iad:

DecadentLinuxUserNumeroUno@decadence.org wrote:
Robert Baer <robertbaer@localnet.com> wrote in
news:unwpF.57464$O_.53958@fx39.iad:

bitrex wrote:
On 10/14/19 11:11 PM, jlarkin@highlandsniptechnology.com wrote:
Sounds like a minor mobster.

https://www.electronicdesign.com/analog/11-myths-about-inductiv
e- position-sensors


See Fig 1.

I remember when Electronic Design often made sense.



Eddie Currents possibly associated with the notorious Eddie
Coyle:

https://www.youtube.com/watch?v=vWdqoPHW-F8



Not playable.



You still on a 9600 baud modem, boy?

You tryin' to tell us that you have never played a video on
the
youtube site? 'Cause that is where that one is, and they are all
the same format.

They are NOT "all in the same format"; there are at least 2
formats,
one (the "unplayable" for me) becoming more re.
Most "unplayable" YouTube vids have he other version available;
bitch
to find..

Then get "clipgrab" and DL them and watch them in the format you
chose to DL them in, and cast them away as you desire or kep them.

I do not DL MP3s. I DL YouTube videos of the same song. So I have
quite a music collection, but zero MP3s.

<https://www.youtube.com/watch?v=KYx2uZRlJCk>

 

[Robert Baer]

John Larkin wrote:

On Tue, 15 Oct 2019 20:30:45 -0000 (UTC), Steve Wilson <no@spam.com
wrote:

John Larkin <jlarkin@highland_atwork_technology.com> wrote:

GPS can determine compass direction if the car is in motion, if GPS
tracks its location, and you assume the car is pointed in the
direction that it is going.

I doubt anyone has actually done that.

I think that's how my Garmin works. When I start my car and move a few feet,
it knows exactly which direction to steer to get on track to my destination.

Very simple idea, actually.

What if you start in reverse?

Then gasoline gets made and fills the tank.

 

[Robert Baer]

DecadentLinuxUserNumeroUno@decadence.org wrote:

Robert Baer <robertbaer@localnet.com> wrote in
news:unwpF.57464$O_.53958@fx39.iad:

bitrex wrote:
On 10/14/19 11:11 PM, jlarkin@highlandsniptechnology.com wrote:
Sounds like a minor mobster.

https://www.electronicdesign.com/analog/11-myths-about-inductive-
position-sensors


See Fig 1.

I remember when Electronic Design often made sense.



Eddie Currents possibly associated with the notorious Eddie
Coyle:

https://www.youtube.com/watch?v=vWdqoPHW-F8



Not playable.



You still on a 9600 baud modem, boy?

You tryin' to tell us that you have never played a video on the
youtube site? 'Cause that is where that one is, and they are all the
same format.

They are NOT "all in the same format"; there are at least 2 formats,
one (the "unplayable" for me) becoming more re.
Most "unplayable" YouTube vids have he other version available; bitch
to find..

 

[amdx]

On 10/17/2019 10:55 AM, jlarkin@highlandsniptechnology.com wrote:

On Tue, 15 Oct 2019 12:31:14 -0500, amdx <nojunk@knology.net> wrote:

On 10/15/2019 11:33 AM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 15 Oct 2019 10:58:56 -0500, amdx <nojunk@knology.net> wrote:

On 10/15/2019 8:59 AM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 15 Oct 2019 01:20:02 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 2019-10-14 23:11, jlarkin@highlandsniptechnology.com wrote:
Sounds like a minor mobster.


Where have you been? Eddie Current is famous for inventing the LVDT :
"Linear Voltage Displacement Transformer", according to the article.

https://www.electronicdesign.com/analog/11-myths-about-inductive-position-sensors

See Fig 1.

I remember when Electronic Design often made sense.

Most recently around 1995, iirc.

Cheers

Phil Hobbs
(Who BITD learned a fair amount from ED, EDN, and especially RF Design.)

I thought you might enjoy the single-winding transformer and its
interesting field lines.


I am assuming you noticed that half of the lines of force are drawn
incorrectly? Or did my 11th grade electronics course fail me?

They cancel to zero field at the center of the coil.


It looks like two turns on the primary, and I wish they had shown the
secondaries.

It's a transformer. It doesn't have secondaries!

What is this referring to, first sentence below image #1.
"Two secondary coils are used to detect this magnetic field, and just
like with a transformer, we use Faraday's law to convert this field into
a voltage."

Beats me. I only see one coil with opposing field lines.

Well we know the opposing field lines is wrong or the they were trying
to represent something and did a very poor job.


> It wouldn't induce signal into secondaries if they did exist.

Only you start with that wrong premise.

Mikek

And LVDTs aren't eddy-current based. The moving core is ferrous and
*increases* coil coupling.

 

[Bill Martin]

On 10/15/19 9:17 PM, jlarkin@highlandsniptechnology.com wrote:

On Tue, 15 Oct 2019 20:44:05 -0800, Robert Baer
robertbaer@localnet.com> wrote:

Eddie who? Brother to Siegfreid?
Is Eddie still currently circulating amongst the magnates?
Or is he potentially unemployed?

He's hiding from the authorities, afield under the name of Eddy
Sloman.

Nah, he's that guy with the comb, from the old "Sunset Strip" TV show...
if you remember that, you ARE old!

 

[Michael Terrell]

On Friday, October 18, 2019 at 11:02:48 PM UTC-4, Bill Martin wrote:

On 10/15/19 9:17 PM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 15 Oct 2019 20:44:05 -0800, Robert Baer
robertbaer@localnet.com> wrote:

Eddie who? Brother to Siegfreid?
Is Eddie still currently circulating amongst the magnates?
Or is he potentially unemployed?

He's hiding from the authorities, afield under the name of Eddy
Sloman.



Nah, he's that guy with the comb, from the old "Sunset Strip" TV show...
if you remember that, you ARE old!

The TV show is called '77 Sunset Strip' and it was still running in syndication a few weeks ago.

 

[Robert Baer]

Michael Terrell wrote:

On Friday, October 18, 2019 at 11:02:48 PM UTC-4, Bill Martin wrote:
On 10/15/19 9:17 PM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 15 Oct 2019 20:44:05 -0800, Robert Baer
robertbaer@localnet.com> wrote:

Eddie who? Brother to Siegfreid?
Is Eddie still currently circulating amongst the magnates?
Or is he potentially unemployed?

He's hiding from the authorities, afield under the name of Eddy
Sloman.



Nah, he's that guy with the comb, from the old "Sunset Strip" TV show...
if you remember that, you ARE old!

The TV show is called '77 Sunset Strip' and it was still running in syndication a few weeks ago.

...and the name is Kookie.

 

[Michael Terrell]

On Saturday, October 19, 2019 at 2:59:59 AM UTC-4, Robert Baer wrote:

Michael Terrell wrote:

On Friday, October 18, 2019 at 11:02:48 PM UTC-4, Bill Martin wrote:

Nah, he's that guy with the comb, from the old "Sunset Strip" TV show...
if you remember that, you ARE old!

The TV show is called '77 Sunset Strip' and it was still running in syndication a few weeks ago.

...and the name is Kookie.

No.

The actor was: Edd Byrnes

The character's name was: Gerald Kookson, III

The character's nickname was: Kookie

 

[gray_wolf]

On 10/18/2019 10:02 PM, Bill Martin wrote:

On 10/15/19 9:17 PM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 15 Oct 2019 20:44:05 -0800, Robert Baer
robertbaer@localnet.com> wrote:

    Eddie who? Brother to Siegfreid?
    Is Eddie still currently circulating amongst the magnates?
    Or is he potentially unemployed?

He's hiding from the authorities, afield under the name of Eddy
Sloman.



Nah, he's that guy with the comb, from the old "Sunset Strip" TV show... if you
remember that, you ARE old!

Yes I am old!! When are you brilliant engineers gonna develop a rejuvenation
device that'll fix all that. Hurry up please!

 

[Cursitor Doom]

On Sun, 20 Oct 2019 05:42:51 -0500, gray_wolf wrote:

Yes I am old!! When are you brilliant engineers gonna develop a
rejuvenation device that'll fix all that. Hurry up please!

Drinking babies' blood does the trick, I believe. Many of our elderly
billionaires swear by it. Might be worth a try for you.



--
This message may be freely reproduced without limit or charge only via
the Usenet protocol. Reproduction in whole or part through other
protocols, whether for profit or not, is conditional upon a charge of
GBP10.00 per reproduction. Publication in this manner via non-Usenet
protocols constitutes acceptance of this condition.

 

Bill Sloman <bill.sloman@ieee.org> wrote in
news:14c82809-d9b0-4ee1-a8f7-6a2ff7932b70@googlegroups.com:

On Sunday, October 20, 2019 at 11:19:10 PM UTC+11, Cursitor Doom
wrote:
On Sun, 20 Oct 2019 05:42:51 -0500, gray_wolf wrote:

Yes I am old!! When are you brilliant engineers gonna develop a
rejuvenation device that'll fix all that. Hurry up please!

Drinking babies' blood does the trick, I believe. Many of our
elderly billionaires swear by it. Might be worth a try for you.

Cursitor Doom probably got this from his extensive reading - the
Protocols of the Elders of Zion is reputed to contain this kind of
nonsense.

Violent movies do not make civil folk do bad things. Neither does
odd fictional novels. It is when abject idiots like CD watch and
read them that bent perspectives get adopted, and bad events
propagate.

 

[Bill Sloman]

On Sunday, October 20, 2019 at 11:19:10 PM UTC+11, Cursitor Doom wrote:

On Sun, 20 Oct 2019 05:42:51 -0500, gray_wolf wrote:

Yes I am old!! When are you brilliant engineers gonna develop a
rejuvenation device that'll fix all that. Hurry up please!

Drinking babies' blood does the trick, I believe. Many of our elderly
billionaires swear by it. Might be worth a try for you.

Cursitor Doom probably got this from his extensive reading - the Protocols of the Elders of Zion is reputed to contain this kind of nonsense.

--
Bill Sloman, Sydney