Now we need some software so our Arduino knows what to do with the monster we just attached to it! Here is the sketch I wrote that reads the rotation...
How to build your own adruino based electrostatic field mill. I'm going to show you how to build this amazing device that allows you to monitor the amount of electrostatic potential exists around you. Youll be able to watch the electrostatic fields that follow under clouds, occur when you move and walk or even wave your arms! We're going to build this from parts that almost any body has around the house.
To build your field mill you'll need the following:
An adruino (any model should work)
An old processor or case fan from an old computer (it needs to run and be the kind with 3 wires)
A couple of the clear CDs that come on the tops and bottoms of cr-r spindle packages
One cd any kind
A cd-r spindle package
A glue gun
A dead hard drive