Automatic Horse Hay Feeder 

I’m going to build one of these but with an electric hay elevator. So we can load 10+ bales and remotely drop a bale through a window.

Gday, i currently have 3 automatic hay feeders which work similarly, however i do not have acces to 220v / 110v, as they are ment to stand alone and are 'driven' by an battery pack with a small solar panel. I currently have the issue that i cant overcome the weight of the hay in a bag to consistently drop the hatch. Is this magnetic lock you're using a demagnetizing lock when activated, or is it an electric one that needs constant power and drops when the power is dropped?

Do you have any ideas on how to set up several different drops out of the same feeder? My wife like them to have access to food most of the day so she feeds 4 times a day. Looking for ideas for this. She uses hay bags, so I thought you could create some type of merry go round system that would only give them access to one bag at a time. Any thoughts on that design or modifying your idea for several different feeding times without building several different boxes. Possibly have 4 doors in one box?

Does the magnet still work well in winter conditions? -30 degrees c?

How do you hook up the magnetic latch with the timer?

The video says you made a smaller one for 1 horse. Could you tell me the size of the frames you made for the smaller one? thanks

What size wire did you use?

It is wasteful bc they will drag the hay through mud poop etc