Applied Procrastination has created a 252 electromagnet-matrix that controls ferrofluid:
Fetch: A Ferrofluid Display
A student-project at the University of Oslo. We have designed and built a massive ferrofluid-display with 252 electromagnetic “pixels”. The display has a 12×21 resolution (the closest we could get to 16:9 on our budget), and is not DONE.
On Applied Procrastination we’ve shared all the details of this project and hope that it will inspire you to make something similar – or follow your own dream projects.