For roommates sharing a dorm, the hook-up buddy is a convenient alert system, storing contraception. Composed of a pulley, the device uses a flex sensor to detect which roommate is accessing the goods and sends a text to the other roommate via Arduino wifi to stay out of the room.
Here is the two minute demo of the situation the Hook-Up Buddy was created for: https://youtu.be/FI3HeWEGfO8
Here is the four minute video including abstract, in-depth technical description, and related code: https://youtu.be/NZp6ryFAru0
The complete pdf report is attached to this submission and the link is also available here: https://docs.google.com/a/seas.upenn.edu/document/d/1FO0x7B5e2nzzIouaFKbrQ7rg2fSNQ7GK-WCAkhILXE4/edit?usp=sharing