Anti-Ghosting

Are you interested in a Masterkeys S with cherry blue switches?

I switched to a Durgod with brown switches and couldn't be happier.

Rather than lazy, you should assume cheap. Consumer hardware is usually optimized to cut costs.

But if you put the switches in a 10x10 matrix, then you just need 10+10 = 20 pins, enabling a cheaper micro, cheaper interconnect from the membrane switches to the PCB, etc. That's the benefit, but it comes at the cost of that ghosting (unless you add extra complexity, like a diode in series with each switch). Good keyboard vendors try to lay out the matrix so important key combinations don't ghost, like any combination of modifiers, WASD, etc.

A keyboard is scanned by pulsing each row individually and checking which columns become active because a pressed key connects them. (Or vice versa.)

In (2), when the green row is pulsed, only the green column becomes active, because it's connected to the green row by the pressed key (upper left red dot).

In (4), when the upper of the two green rows is pulsed, both the green columns become active — the first because the upper-left red dot is pressed, and the second because there is a path through all three of the red dots (pressed keys). So the keyboard senses a key press at the dotless intersection, even though that key is not pressed.

Better keyboards solve this problem with a diode on each key, so that the roundabout path can't happen. Cheap keyboards rearrange the rows and columns into squiggly paths so that the three-key pattern doesn't happen very often, being especially careful with the modifier keys.

However: I want tactility, and with regards to tactility very few switches actually beat good rubber domes. Not rubber domes as in topre, just generally. The switches that do provide tactility (I would say that the matias switches are a good example) have been less reliable than a good rubber dome for a lot more money(at least outside matias' own keyboards).

Also, with a lot of these non-cherry switches I have found binding issues, and as we all know binding is the keyboard antichrist.

The only solution to getting a properly tactile switch I have found to be to buy increasingly expensive switches and build your own board, which I have no interest in whatsoever, or just buying a buckling spring board, where you will get a lovely 2KRO for non-modifier keys (unicomp is updating their process and releasing the "new model m" btw).

After all this, I don't understand the craze for mechanical keyboards. For linear boards there is really no good option, but for typists a good dome board (with slider) will be just as good and cost less than half as much.

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If that's how bad they are at web design, I wonder how bad their products are.

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