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Picture of Automatic Promotional Button Dispenser

After getting a bunch of promotional buttons, I decided to spend countless hours to design and build a machine to give them out for me.

Step 1: Video

The build process is outlined in this video, including how I tried to use a magnetic escapement instead of the 3D-printed "blades" that I eventually settled on.

The concept of the device is known as an escapement, and the top servo holds most of the buttons back, while the bottom servo drops one at a time.