It is a device that simulates Parkinson's disease
Step 1: Design With Fusion 360
Step 2: Lead Weigt
WARNING THIS PART IS DANGERAUS
Make the process outdoor
Use safe gloves, safe goggles and mask
Put the piece in very little water. Dry the inside of piece(3d print mold). Pour the molten lead. Do not smell steam.
Wait a few minutes to cool down. Do not touch it until you are sure it is cold.
Step 3: 3d Print and Test
I use 12volts DC Gearhead 100 rpm electric motor but 12v not enough for turning lead weight. So I use a 19 volt laptop adapter
Make strap with velcro