As it is getting cold again and my chickens made it through the summer just fine, it is time to revisit and revitalize my automatic chicken door.
The older model was a large door that slid on a track that would get leaves, snow, and ice messing the whole thing up. Also the mecanisim that opened the door was a string that tension was held on with springs, the string would knot up and stop working, blowing the fuse sometimes.