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The step-by-step, mechanical logic of old pinball machines

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Further reading 1

Without a program counter, how does a jukebox remember the next step? →Release the jukebox button and the record keeps moving. Follow the holding circuit, then compare a pinball reset with a furnace pressure switch to find where state lives and what lets a sequence advance.This video helps answer · What must pinball forget before the next ball?

Caption notes

Relays and a score motor sequence operations in an electromechanical pinball machine. Starting the next ball requires resetting selected state from the previous one, making reset a procedure rather than just a change of display.

Archived captions (transcription method unspecified) ↗
Original passages · 2
with a few relays and a wacky contraption called the score motor
The step-by-step, mechanical logic of old pinball machines · ▶ 0:16–0:20
it also needs to reset any of the relays that might have been triggered in the last ball
The step-by-step, mechanical logic of old pinball machines · ▶ 29:14–29:19

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