ELI5: Explain Like I'm 5

Fourteen-segment display

Hey kiddo, have you ever seen a digital clock or calculator before? Well, those things use something called a "display" to show the numbers and symbols. There are many different kinds of displays, but today we are going to learn about a special one called a "fourteen-segment display."

Now, let's imagine you want to show the number "5" on a digital display. A fourteen-segment display looks like a rectangle with fourteen lines sticking out of it like arms and legs. These lines are called "segments." They are arranged in a certain way to form the shape of a number or letter.

To form the number "5" in a fourteen-segment display, we need to turn on certain segments and turn off others. We turn on the middle straight line segment to make the top of the number "5," and we turn on two diagonal line segments to make the bottom of the number "5." We also turn on two small corner segments to make the bottom left and right corners of the number "5."

But wait! That only turns on five segments! So how do we make the rest of the number "5"? Well, this is where it gets tricky. In a fourteen-segment display, some of the segments can be used for more than one number or letter. For example, the diagonal segments we used to make the "5" can also be used to make the letter "A."

So if we want to display the word "YES," we can use the fourteen-segment display to turn on the segments that make the letters "Y," "E," and "S" in order. And because some segments can be used for more than one letter, we can still make all the letters we need even though there are only fourteen segments.

Cool, huh? That's the basic idea behind a fourteen-segment display. It's like a puzzle where you have to figure out which segments to turn on and off to make the right shapes. But once you know how to do it, you can display all sorts of numbers and letters!