I'm the farthest thing from an engineer in the world............ I made one for $5 from a automatic car antenna from a junk yard. All the details on how you can make one too are in my thread..........
My automatic coop door for only $5 bucks:
http://goo.gl/C1rmZd
Detailed plans and Youtube...
Check out this link...... I made one for $5 bucks with an automatic car antenna from a junk yard.
My automatic coop door for only $5 bucks:
http://goo.gl/C1rmZd
To answer your questions.
1) Would an automatic chicken coop door be of any interest to you? Yes
2) If so, how much would you be...