Brushed magnet-less motor demo

As a high school project we were asked to make a simple electric motor for demonstration purposes. While most classmates chose to build a motor using a magnet and a rotating armature coil, I chose to take it one step farther and eliminate the use of a permanent magnet by way of using an armature coil and a field coil with primitive copper brushes to allow the armature to rotate freely while making the the switching polarity electrical connections needed to propel the armature.

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  2012-04-11_19-20-09_807