Just a list and quick description of some random fun projects I've done.
Controllable TENS Unit
TENS Units are used to activate muscle groups on the human body. I designed a high power implementation, which required controllable current and power to prevent skin burns and nerve damage when activating muscle groups. Self tested ~20 times.
Gertrude
Coded and used productivity program which forced the user to work in specific desktops on Windows according to an uploaded calendar. Also locks unproductive websites when specified. Self tested for ~9 months.
Workout Brick
Brick with accelerometer and ESP32 attached which classified various proper lifting forms on board. If improper form is used, Workout Brick remotely renders the user's laptop useless until the user correctly lifts. Self tested for 1 month.
Robot Arm
Made as part of an internship. I designed, machined, 3D printed, manufactured, and programmed the arm myself. Could move coffee mugs, which was its intended purpose.