Stock Electronic Image FAILS

[themadhippy]

way my eyesites going im gonna need one of  them microscopes just read the bands on a 3 watt resistor,to think i used to able to just glance at  an 1/8 watt  and read the colour code without a magnifier in site

[Analog Kid]

That's a method of measuring resistance I wasn't aware of..

But where is their mandated protective eyewear?

[vk6zgo]

The plain old push type rotary mowers (non self propelled) "don't need no steenkin' drive belt"!

The one depicted has a clutch control on the bars, so the belt drives the rear wheels. We've had several over many years and they've all had drive to the wheels.

Such devices exist in Oz, but are quite rare. The non-self propelled ones aren't that heavy to push & are cheaper.

[vk6zgo]

way my eyesites going im gonna need one of  them microscopes just read the bands on a 3 watt resistor,to think i used to able to just glance at  an 1/8 watt  and read the colour code without a magnifier in site

The problem isn't your eyesight as much as the crappy palette of colours they use these days, which make yellow, brown & red almost the same.

[Analog Kid]

way my eyesites going im gonna need one of  them microscopes just read the bands on a 3 watt resistor,to think i used to able to just glance at  an 1/8 watt  and read the colour code without a magnifier in site

The problem isn't your eyesight as much as the crappy palette of colours they use these days, which make yellow, brown & red almost the same.

My pet peeve there is how close red and orange are.
Is that 4.7K or 47K?
Need a damn spectrometer. (Or an ohmmeter.)

[gamalot]

What I want to know is what is that parameter, Ube?

Oh, I get it, the "AI" hallucination of "Vbe"? (I guess ~500 mV is about right?)

It has nothing to do with AI, it is a Chinese style (probably learned from some European countries)

[Analog Kid]

So what does "U" stand for, anyhow?
The rest of them I get (E, V, I).

[gamalot]

The use of U to represent voltage may originate from either German or Latin, I’m not sure which exact word it comes from. One advantage of using U is that it avoids confusion with V, which often denotes velocity in physics textbooks.

[themadhippy]

I’m not sure which exact word it comes from.

difference, as in potential difference

[Analog Kid]

I’m not sure which exact word it comes from.

difference, as in potential difference

But how do you get "U" out of that?

[themadhippy]

Unterschied

[McBryce]

So what does "U" stand for, anyhow?
The rest of them I get (E, V, I).

In German (and possibly some other languages?), U is used to denote Voltage. It comes from the Latin word Urgere, which I think means "to push or displace".

McBryce.

[HighVoltage]

That is correct and we learn this in Germany:

In the German language, voltage was originally referred to as the "difference of electric potentials".
„Unterschied der elektrischen Potenziale“

Therefore, the abbreviation U became established here in Germany and still is today.

[McBryce]

That is correct and we learn this in Germany:

In the German language, voltage was originally referred to as the "difference of electric potentials".
„Unterschied der elektrischen Potenziale“

Therefore, the abbreviation U became established here in Germany and still is today.

Confused the hell out of me when I moved here originally. I studied in Ireland, where we use V, and ohms law with a U just looks wrong as far as I am concerned.

McBryce.

[exe]

Interesting, I'm not triggered by U instead of V, and I don't care much. I'm of eastern-european background, and it seems in Soviet Union "U" was used for voltage (I just checked "The art of electronics" 2nd edition in Russian). Also in Russian wikipedia: https://ru.wikipedia.org/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD_%D0%9E%D0%BC%D0%B0 (Ohm's law). Probably, that's also what I learned at school.

[TimFox]

I learned Ohm’s Law as E = I R 65 years ago, where E stood for electro-motive force (emf).
Why is current labeled I?  Intensity?
In physics, when emf is distinguished from potential difference, it is defined as the line integral of the electric field (vector), which itself can be defined as the gradient (vector) of the potential (scalar).

[tszaboo]

I learned Ohm’s Law as E = I R 65 years ago, where E stood for electro-motive force (emf).
Why is current labeled I?  Intensity?
In physics, when emf is distinguished from potential difference, it is defined as the line integral of the electric field (vector), which itself can be defined as the gradient (vector) of the potential (scalar).

Never mind that, when Electromagnetic fields was taught, we run out of the capital and lowercase greek alphabet as well, and sigma was used for like 4 different things.

[HighVoltage]

I learned Ohm’s Law as E = I R 65 years ago, where E stood for electro-motive force (emf).
Why is current labeled I?  Intensity?

Yes, the "I" for current goes back to the roots in France “intensité de courant” based on the influence of André Ampère.

[Fungus]

The problem isn't your eyesight as much as the crappy palette of colours they use these days, which make yellow, brown & red almost the same.

Yep, cheapest possible paint, colors look all the same.

The blue ones are even worse.

[TimFox]

The use of U to represent voltage may originate from either German or Latin, I’m not sure which exact word it comes from. One advantage of using U is that it avoids confusion with V, which often denotes velocity in physics textbooks.

In American physics books, velocity is lower-case v, while potential is upper-case V.
A real physicist tries to get velocity (properly italicized) and Greek “nu” for frequency into every equation to confuse the reader.
Careful usage (my mantra) italicizes variables but not units:  V = 12 V.

[themadhippy]

The blue ones are even worse

yep,with green being a close second,back when i wura lad resistors were beige and the colours stood out.

[Circlotron]

V vs U for voltage is *potentially* confusing.

[Analog Kid]

V vs U for voltage is potentially confusing.

But only for someone from Yurp or Asia. Nobody over here (US) uses "U".

[PlainName]

V vs U for voltage is *potentially* confusing.

That's shocking.

[kite31]

V vs U for voltage is *potentially* confusing.

That's shocking.

Jokes like that go in cycles. It's just a phase.