Good-bye, breadboard. Scientists at the University of Illinois have come up with a conductive, water-based ink that lets you draw working circuits on an ordinary piece of paper. They’ve packaged the product into a rollerball pen, called Circuit Scribe, and if you want to be one of the first to get hold of one, the team is crowdfunding the project on Kickstarter right now.
A pen that can draw working circuit pathways? That’s pretty damn cool. In fact I can think of several practical jokes involving conductive ink. On a less nefarious note, these things would have been a ton of fun in my college electronic classes.