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I need two state linear actuator. You can have a look at the picture to understand what I mean.

Don't care about the hand !

mit inform project
(source: robaid.com)

I need to electrically move the things like this squares up and down. Bidirectional linear actuators are needed. What is the cheapest and tiniest actuator (or sth else) that I can use to move this squares up and down. There are just two states ('up','down'). Don't care how much higher a square rises, when it is up.

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    $\begingroup$ The question isn't clear. Presumably a user uses a finger to press a button. What is the "two state linear actuator" supposed to do? Also, what's the bigger picture? Ie, what is your overall goal? $\endgroup$ – James Waldby - jwpat7 Sep 21 '14 at 1:11
  • $\begingroup$ Updated the question $\endgroup$ – gungor Oct 10 '14 at 23:35
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What you are looking for is called a solenoid.

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  • $\begingroup$ Short and to teh point, Ian :-) $\endgroup$ – Andrew Oct 23 '14 at 10:13

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