Eddie Currents

Eddie Currents possibly associated with the notorious Eddie Coyle:

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

Most recently around 1995, iirc.

Cheers

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

That would have been back when you could still remember how to spell "eddy".

Dementia does leave you feeling confused.

snipped-for-privacy@highlandsniptechnology.com wrote in news: snipped-for-privacy@4ax.com:

Eddie who?

Eddie Currants?

Does he Edify The Church?

He's the LVDT's raisin d'etre.

(If you'd even skimmed the article, you'd have gotten the jokes--JL was poi nting out one of several illiterate mistakes found there, hence the lament about ED's quality having tanked.)

Cheers

Phil Hobbs

(inknown to the Microchip marketing droid who wrote the piece, LVDT is "lin ear differential _variable_ transformer.)

snipped-for-privacy@gmail.com wrote in news: snipped-for-privacy@googlegroups.com:

I did look. All I saw was "eddie" being incorrectly spelled.

Did not see many if any literary errors. But I did just quick glance it.

Yeah I saw that as well. But I decided to leave it alone.

You must be experiencing a bit of mild dyslexia in your old age. You got your 'differential' and your 'variable' swapped. :-)

Hey Phil... I am the inknown critic. ;-)

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

I think I have seen billboards for Eddie Currents and His Rythm Machine playing at an Indian Casino lounge.

snipped-for-privacy@highlandsniptechnology.com wrote in news: snipped-for-privacy@4ax.com:

And why were you playing at an Indian Casino Lounge? :-)

Indian? Wouldn't it be Eddie Currants then?

Stretches of I80 are festooned with billboards of happy gamblers (usually Asian) and has-been bands. It's sad that a band goes from Golden Record to Las Vegas to Reno to Indian casinos.

Raisin the standards.

Remember bingo cards? The mags and the cards kept us up to date.

Given the importance of the electronics industry, the publications are now disgraceful. They might hire some retired-actual-EEs to check their stuff before they publish.

The microwave and optics and aerospace mags are still good.

I am relieved to learn that inductive sensors don't measure inductance.

I am assuming you noticed that half of the lines of force are drawn incorrectly? Or did my 11th grade electronics course fail me? It looks like two turns on the primary, and I wish they had shown the 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

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

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

The compass in my Audi rear-view mirror usually works pretty well, but a steel bridge might mess up any magnetic compass. There is a drive-in-circles cal procedure that I haven't tried.

amdx wrote in news:qo4qbu$e5b$ snipped-for-privacy@dont-email.me:

My phone's GPS position indicator responds instantly to direction changes, even if I stand in one spot.

Maybe they dampen the transducer output for the direction indicator, so it is not so erratic with nearby mag fields.

Anyway works in a car or on a bus. Not sure about high DC electrical currents. They would likely toss it (the reading) around a lot.

snipped-for-privacy@highlandsniptechnology.com wrote in news: snipped-for-privacy@4ax.com:

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.

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

Does GPS give compass direction? How does that work?

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

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."

tirsdag den 15. oktober 2019 kl. 19.27.03 UTC+2 skrev John Larkin:

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

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.

Used that method 15+ years ago in an instrumented car for research.