Why do circuit breakers go up for on and down for off?

Feb 11, 2023 Last reply: 2 years ago 1839 Replies

Oddly red+green light produced yellow. At least it seems odd to me, but I can't get into others' heads. Yellow looks completely different from red and green to me, whereas red+blue produces magenta which looks like a mixture of red and blue. Blue+green produces cyan, which is more like a light blue to me, but maybe if it is darker it would look teal, which is blue-green.

It's odd that colour circle (wheel) diagrams look right, and violet looks like an intermediate between red and blue. Is this a perceptual matter, or is it that extreme red is twice the wavelength of extreme blue, in which case it's physical? If so, why should this be the case as our eyes are just adapted to the range of light mostly produced by our Sun?

We do have an internet. You could look it up.

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Or maybe he doesn't test all the people he knows.

Some cultures, especially asians, like bright primary colors. That could well be genetic.

There are clearly differences in male/female color vision. There are other diffrences, which is nice.

The first DTL and TTL parts were nand and jk flops. Before that, we had RTL which was mostly nor. Both were horrible, slow and expensive and unreliable.

The old non-electronic car voltage regulators, in the DC generator days, used a vibrating reed to adjust the field current. That was a PWM buck converter: apply the voltage to the load some of the time.

They are willing to utter the bullshit names marketers come up with to describe colors. All I know about teal is they're tasty if you manage to shoot one.

Other than the NORPAK debacle it was all TTL and eventually CMOS before I moved more toward the software side as microcontrollers came into play. It was a profitable combination for embedded systems.

I rather miss ucontrollers so I play around with them on the side. Right now I'm looking at tinyML. It's disappointing that you need megaML to distill down the inference set to run on a tiny chip.

herbal? I often hear the h dropped there too, possibly as an extension of erb. Like you say anyone who wants consistency better learn German.

I prefer to use the names assigned by Crayola.

I can't believe you lived through the 1980s without knowing more about the color teal. The entire decade was colored teal and mauve.

Yes, "erbal". Isn't that how it's pronounced in the commercials?

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The canonical source for color naming is Pantone.

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What is megaML? It doesn't google well.

Best wild duck I ever tasted. They dint eat pondweed. They eat estuary shrimp

It depends on your discipline and location.

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I'm happy with the RGB value.

Was it? I was too busy to notice. I think the most pretentious one is 'taupe'

Bullshit on the unreliable.

The Fairchild and Motorola RTL parts were horrible, as were the early TI TTL parts. They hadn't got the plastic packaging right yet and temperature cycling would break wire bonds. Maybe the ceramic flat-pack parts were OK, but we couldn't afford them.

There was Purple Plague in those days too.

Bullshit and I did the maintenance on a DEC PDP9 which used it extensively.

Bullshit and I did the RTL/TTL interface for the mag tape for the PDP15 which was the TTL version of the PDP9

Never had a single failure like that.

I used the plastic packaging exclusively and so did DEC and we never had any failures at all.

The PDP11/10AD didn't either.

Never saw that either.

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