Secret Knock Detecting Door Lock:
This device can recognize a secret knock pattern that’s up to 20 knocks long and unlock the door if it is correct! Instructions on how to make it can be found here.
The world’s deepest bin
This trash can makes it sound like garbage thrown in is taking a really long time. It made throwing trash away more fun and even got some people to pick up litter.
Urban Lights Contacts:
This interactive sound installation changes the sound output based on electrostatic connections; in other words, it will make varying sounds from how close people are and if people are touching. This is a really cool concept, but definitely something that would give me anxiety to try because of COVID.