Board Thread:Questions and Answers/@comment-80.39.208.137-20131221105326/@comment-5112555-20131222103325

well, first you need a piston door (a jeb door is reccommended) wich opens at a redstone pulse. then plug the computer in the input. this can best be done with a redpower computer with IOX. for programming the IOX, read the page about it. then you're done.