Homopolar DC Motor

About: I am robotics engineer and a teacher whose passion in life is breaking down the maths and academic jargon of programming and robotics into something that everyone can understand, primary school kids include...

To understand the theory of electromagnetic motors. watch opening 3 minutes of this video

Components Used:

10 mm x 2mm circular neodymium magnets. (5pcs)

AA Battery (1pcs)

0.8mm laminated copper wire

Tools used:

Sandpaper sheet



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Step 1: Trace Out the Shape of the Wire


overall 8 cm high 4 cm wide

Step 2: Fold the Wire to the Traced Out Shape

Also if necessary fold the bottom leads inwards to keep the wire wrapped around the magnet stack

Step 3: Dent the Battery Top, Sandpaper the Contact Points

Step 4: Place the Wire Rotor on the Battery and Watch the Motor Go!

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