Office vibration sensor.

The object was to create a sensor from common office objects. My first idea was to make a vibration sensor (great for detecting bosses with heavy footsteps or passing light rail trains). Here are some items that should be easy to find in any office.

basic materials

In just a few minutes, I came up with this. Not pretty, but effective.

finished product

Best if used on something that wobbles at the slightest movement. That rickety shelving unit, perhaps?