Friday, November 03, 2006

How an Etch-A-Sketch works

Etch2The fine folks at HowStuffWorks took one apart and show us what they found.

 When you turn the Etch-a-Sketch upside down and shake, it coats the inside face of the glass with an aluminum powder.

 When you turn a knob, it moves its bar, and this moves the stylus. The stylus scratches off the aluminum dust coating the glass to create a line on the screen.

Etch7

Read the whole article (with pictures)

via

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