Why Are Printed Circuit Boards Usually Green? (2017)

But since people have many more rods than cones, black/white contrast is easier to discern and white uses all the subpixels in your display to maximize luminance. And speaking of subpixels, subpixel antialiasing effectively triples your resolution when displaying black/white contrast.

The brain also highlights contours of contrasting black/white. (There's an evolutionary quirk in our blue-sensing cones that allows you to see contrasting blue/yellow better than most combinations too but still not as well as black/white.)

So sharp white on black or black on white are typically better suited to human vision if you're trying to discern outlines like when reading text.

Black/white also avoids the persistence effects that cones have, where when you look away from a green image for example, you'll see an inverted magenta copy of the image for a second or two.

I'm not going back, but if you're into it, maybe try: https://marketplace.visualstudio.com/items?itemName=gerane.T...

Small but meaningful advantage in a manual application:

* Guiding the user to guide a complex machine through a precise sequence of steps in order to achieve a goal, such as reading mail or writing a letter

Automation:

* Natural language recognition, shell scripting

Economy of scale:

* Beautiful formatted text has lost its value due to being ubiquitous, and more and more document processing consists of copying and pasting in an e-mail program

Well blowing stuff up is part of the electronic learning experience isn't it? :)

Examples here: http://golddredgervideo.com/kc0wox/tek/7504/detailedpictures...

Whole scope is a work of art!

I haven't used that service since maybe 2007, OshPark Super Swift and Chinese vendors have made it obsolete.

It's interesting to see a similar phenomenon with desktop PC motherboards: "gamer" or otherwise "enthusiast" boards are often a non-green colour and come with superfluous design elements (like plastic covers over the actual components, which sort of remind me of the engine covers on newer cars...), while both the ultra-cheap prebuilt and ultra-expensive server boards remain green and free of fluff.

For instance, white dyes are hard (for a lot of things) because white dye particles are large[1] and you need a lot of them. That means they can interfere with curing.

Green dye can be relatively small amounts since green is so visible to the human eye, but afaik its more down to the fact that theyve been able to tune the dyes down better over time.

[1]: also why you can't dye anodized aluminum white. Most dyes are colored at the molecular level, and are much smaller than the wavelengths they reflect. White dyes need to reflect every wavelength, and normal molecules only reflect quite narrow ranges where they resonate.

In order to reflect white light you need particles at minimum the size of the wavelength. Then you need a range of particles for each wavelength. In practice this judt gives you black, since each particle will also be absorbing light at other wavelengths. You need one size of particle with fine, often fractal-like microstructure that has features at every size. That means white dye particles are hundreds of times larger than colored dyes.