A Moogle  🏳️‍🌈 💻 🎮 🎶 🇸🇪

You have one set of electromagnets that bend it up and down, and another set that bends it left and right. So you can position it anywhere on the screen, and you can adjust the intensity.

You have to go top to bottom at about 60hz (in NTSC), but to go left to right you have to do it for every line of the picture drawn, so it's very very fast. It has to draw 262.5 scan lines, and it has to do it 60 times a second. So the left-to-right oscillation is 15 kilohertz.

This, by the way, is why CRT TVs make that high pitched whine noise. It's switching a magnet on and off at 15,000 times a second, and that causes vibration through magnetostriction

And the human hearing range is something like 20-20khz, but that rapidly shrinks as you age, starting as young as eight. So by the time you're 40, most people can't hear 15khz anymore.

in any case, vector displays: So what if instead of having the display moving left-to-right, top-to-bottom, and just varying the intensity, you instead gave the computer full control over where it could move?