A door, which opens and closes after pressing a button? Just button -> door. In case of a double-door, you need an inverter for the second door.
A door, which closes after you walked through? Pressure Plate on the exit-site (doesn't work well with double doors yet). Also opens automaticly when you want to walk through the door from the plate-side.
Sorry I didn't explain in more detail, I need it for a minecart booster dispenser. So, minecarts stack up on top of a door, then I need a way of closing the door right after a minecart falls down onto the track, then I also need away for it to open so another minecart can fall onto the track. Could I use detector rails at the start of the booster track and at the end of the tracks ti signal to the door for it to open or close?
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