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

Описание: ch ch ch ch ka CHUNK ch ch ka-CLACK-Y bomp
The last video:
   • Old pinball machines are amazingly complex  

Other videos of electromechanical marvels:
   • The Computer-free Automation of a Jukebox ...  
   • The Selection Accumulator; a Jukebox's Brain  

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