So, the cat has taken to destroying rolls of toilet paper. This has to stop.

Putting TP in cardboard box is no longer working. Getting a better box is easy. Easy way is no fun.

Enter a new 3D printing/Arduino project:

Question 1: How do you make a squirt bottle on a 3d printer?

Research on squirt bottles ends us here: http://home.howstuffworks.com/question673.htm

Question 2: Can you 3d print a complete one way valve?

Research lands us here: http://www.instructables.com/id/How-to-Design-and-3D-Print-a-One-way-Valve/

Question 3: How can we make that smaller?

Get out a piece of paper and throw some ideas down. (See attached)

Question 4: How can we motorize the actual pump action?

Get out another piece of paper and throw some ideas down. (Images coming…)

Engineering brain dump on a one way valve design.: