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You can play Tetris on some old oscilloscopes—who said electrical engineering is never any fun?
For this week's instalment of 'did you know you can play a game on that', I present to you the humble oscilloscope. The voltage graphing instrument used to chart electrical signals over time may sound like the worst way to spend a Friday night but 1) it's pretty neat, actually, you could learn something, and 2) some older models have Tetris built-in.