I'm having a presentation about dc generators and I wanted to demonstrate how it works. Anyone have an idea on how to build one. I left my electric motors at home because of Christmas break, now I can't find anything.
For a presentation it might makes sense to reproduce one of Faraday's original experiments which give more of a visible insight into what is going on than a modern generator which is essentially just a sealed box.
Something like the experiment in this video would be quick and easy to set up.
Obviously making a rotating armature which produces a steady current is a bit more difficult than just moving a magnet in and out of a coil but in some ways the simple version demonstrates the underlying concept better.