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You can do the double solenoids with one relay. But you need, erm, i forget what they are called, but they only allow current to go one way, and you need two of them for each unit.
But, that way, you can have your valve done on a single spike, forward is one way and reverse is the other.
We don't have our (whatever that electrical thing i was talking about up there is)s yet, but we are getting them this weekend and plane to wire them up to our valves soon, and then we can just expand and retract them all we want with the joystick! so much fun just to push a button and hear a *hisssss* and see it move! you have no idea! wait until we get our chassis together and can start waving our arms around.
Anyway. The tubing (is it latex? I thought the latex tubing was for launching boxes?) just slides in and seals. Its great stuff, really, I love it. Its almost too east, i feel like i'm doing something wrong when I dismantle our pneutmatics assembly and then set it back up in two minutes. Its crazycool.
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