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Step 2Make the door
The door is a Plexiglas flap hanging on a hinge. At the bottom, the doorpost will have two solenoids, one on each side of the flap, to block unauthorized animals from getting in. Pretty straightforward. Just a few things to keep in mind:
Make sure that in the resting state, the flap is centered in between the two solenoids. In the picture that is in the red area around the dotted line down the middle. To achieve this it helps to have no heavy things hanging on one side, and to use a hinge with little friction.
It helps to have a hinge without much lateral movement (sideways movement within the plane of the wall). This will help to make the hall-effect sensor (a magnet-actuated switch) work. I will discuss this more in detail in step ...
The door needs to be rigid but light-weight so that it is easy to push it open and doesn't hurt when a tail gets caught. Make the corners smooth and add padding on the edges and the door post to minimize tail tribulations.
Make sure that in the resting state, the flap is centered in between the two solenoids. In the picture that is in the red area around the dotted line down the middle. To achieve this it helps to have no heavy things hanging on one side, and to use a hinge with little friction.
It helps to have a hinge without much lateral movement (sideways movement within the plane of the wall). This will help to make the hall-effect sensor (a magnet-actuated switch) work. I will discuss this more in detail in step ...
The door needs to be rigid but light-weight so that it is easy to push it open and doesn't hurt when a tail gets caught. Make the corners smooth and add padding on the edges and the door post to minimize tail tribulations.
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