Linear actuator uses a lead screw driven by a permanent magnet dc motor to create linear motion from a dc voltage. When power is removed linear actuator will hold its position. However, if a force ...

[Will Finucane] of Revolt Labs/Mad Science Blog was looking for a way to keep his cats happily fed while away on a short vacation, so he put together a cheap and easy automatic feeder to ensure that ...

While you're away you can let your cats have the run of the place, but if you put out too much food at once hilarity may not ensue. You can make a pretty easy automatic feeder using a glue stick, ...