permaculture

["Jeff Hall" <JRHALL@gwgate.lib.iastate.edu>]

Does anyone have information on how to open and close a chicken coop door 
automatically, using a photo sensor or timer? 

Also, I've wondered if any inventor or company has created a wind-up lazy 
susan that is designed to approximately track the sun?

Lastly, has anyone in a winter climate experimented with creating a mini-ice 
house, perhaps filled off an out building roof and allowed to freeze?

Thanks for any ideas or feedback-
Jeff Hall, Ames Iowa USA