Proposal Box
During the spring of 2019, I was planning to purpose to my future wife. After getting the ring I decided I wanted to make some type of unique box to give her the ring. After sketching out a few details I settled on an overly complicated and over-engineered design.
After sketching out a few thoughts I started to design the box in CAD. I started with the mechanical dome.
I settled on a hemispherical box with four doors that close in on itself as the base is turned. It was four inches in diameter, snaps together and can be printed without supports. Each door has a cammed arm that travels on an acme threaded base. The base can be actuated with a small 9 volt geared motor.
Concluding the mechanics, I had an additional motor attached to a linear screw drive to lift the tray holding the ring out of the box.
After concluding my mechanics, I had to design my electronics. I knew I wanted the box to be interactive.
So, I integrated two buttons to an Arduino microcontroller. One button (representing "No") would be programmed to play the "Wilhelm Scream" from a speaker. The other button (representing "yes") would be programmed to begin playing the song "Dancing in the Moonlight" by King Harvest. The Arduino would then begin the activate each motor and commence an LED light program.
