WEBVTT

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sandstone, obsidian, pyrite. Hey, Adabot, what you up to? Oh,

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I was just going through my rock collection. I forgot I had so many.

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Find anything good?

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Sure. Some precious stones.

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This one's my favorite. It's quartz.

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That quartz does look special. Where did you get it?

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There was a rock show at the museum.

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I thought there would be more guitar solos, but it turned out to be a bunch of

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people trading minerals.

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So I got this quartz because it looks really neat.

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It looks neat because it is neat.

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we use quartz in electronics all the time. Did someone say time? Oh, why,

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yes. I was just

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explaining to Adabot how quartz is used in electronics. Excellent. Adabot, do you know

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why I am the world's greatest integrated circuit? No, Hans, why are you the

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world's greatest...

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Timing! It's what I take care of in a circuit. And do you know why my timing is so

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impeccable?

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No. Why is your timing so important?

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Quartz! And why does quartz create perfect timing?

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Um, are you going to keep interrupting me?

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Oh, settle down, Hans. I can explain why quartz is so important for timing.

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Why, thank you.

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You see, certain materials, such as quartz crystals, are piezoelectric.

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Simply put, this means if you apply a small amount of mechanical force to a piece

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of quartz,

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it will generate a small electrical voltage.

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Whoa, that sounds pretty unusual.

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So, if I crushed quartz, would it shock me?

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Well, you have to squeeze it very lightly and just right.

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And the electrical voltage is very, very small.

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But, yes, I suppose you're right.

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And the opposite is also true.

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If you apply voltage to a piece of quartz,

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it will respond with a precise mechanical vibration.

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Whoa! Quartz sounds like magic.

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It's not magic, Adabot. It's science.

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Take a look inside this quartz watch, for instance.

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This little integrated circuit here

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passes electrical current to the quartz crystal.

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Then the quartz vibrates at precisely 32,768

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times per second.

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The IC detects the vibrations, counts them one by one,

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and when it gets all 32,768, it knows one second has passed.

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So there's a quartz crystal inside of that little metal container?

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Yeah, and it looks something like this.

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Hey, that looks like a tuning fork.

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That's true, it does look like a tuning fork.

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Musicians use tuning forks to tune their instruments.

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And circuits use quartz to tune their timing.

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You're right!

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Very true, Adabot. Quartz is an important reference for the timing of so many circuits,

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microcontrollers, computers, and more.

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I always wondered what was in those little metal cans

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And now, I know

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Well, it's about time

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Adabot, I believe Minerva just made a time joke

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Is that what that was?

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Heyo!

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Zing

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Thank you all, thank you all