…what do you want to make today?
Project 3

This is one of the coolest projects I’ve seen in a long time. It’s so simple, but it’s got so much potential. You connect one side of the circuit board to the other, and it puts out a tone at some frequency (I love playing with sound!), and that frequency changes with the amount of resistance between those two sides. And this world is full of different resistors!

You could grab each side of the board with your fingers, and the tone will change depending on how hard you’re squeezing. Or you could wet your fingers a bit and that makes the resistance drop radically, so the tone will jump up. Or you could put a line of water on the table and put a finger in the water and connect that to one side of the circuit board and then hold onto the other side and play around with a finger in the water.

I love this thing because it’s the epitome of physical computing. You’re interacting with this object that takes something physical as its input, performs some kind of processing on it, and gives you an interesting output. It’s simple, easy to build, and it makes interacting with electronics fun in a very different way than playing a video game does.

Thanks to Jay Silver for coming up with it!