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Thinking of the electromagnetic item, rather than the pneumatic relay, which almost everyone related to FIRST considers a solenoid...
Pneumatic cylinders are allowed, within the guidelines of the rules, and as for the strict definition of a solenoid, they would do practically the exact same thing.
I'm fairly certain you're not allowed to divert electricity through anything besides standard electrical components, save the custom circuit board.
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I played hacky sack with Andy Baker.
2001-2004: Team 258, The Sea Dawgs
2005: Team 1693, The Robo Lobos
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