I am a beginner, this is my first post, sorry if it doesn't belong here (please advise where to go for more help).
Here is the video of the thing I am interested to build: https://www.youtube.com/watch?time_cont ... TcIxX_JkfU
I've also attached the screenshot from the video:
Project: imagine a smooth plastic surface with a bunch of led lights underneath. A random LED light turns on and stays on until an "object" covers it. Once the light is "covered", it turns off and another one turns on at another random location.
I never worked with sensors and struggling to figure out which one should I use. I believe the one on the video is using magnetic sensor, which makes it a hard requirement for the "covering object" to also be a magnet. Is it possible to NOT use magnets at all, but accomplish the same result? Is there anything similar that I could take a look as a starting point (don't even know what terms to look for)?