From the MAKE Flickr photo pool
Steven Goodwin shares tips and measurements for making the perfect study hall instrument -
If there’s one piece of science that every kid knows, it’s that twanging a ruler on the edge of the desk makes a noise, and by changing the amount of overhang will change the pitch. Give anyone a new ruler, and the first thing they’ll do is twang it, to see how it sounds. This is an interesting fact of life.
So, to bring an element of fun back to the proceedings, we can combine these facts to build a very simple ‘rule organ’. By taping thirteen rulers to a nearby desk, each with a different amount of overhang, we have a rudimentary musical (?!?!?!?) instrument. So, how much overhang is necessary, and how do we do it?
Head over to his site for the specifics – Rule Organ