Step 6Construct the motor casing.
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If your motor does not fit snuggly inside the PVC pipe then see if a water bottle cap can. If it can, then cut a hole in it so that your motor fits snuggly inside the water bottle cap and then shove that inside the pipe. Once it is established that the motor is protected and that the weight can spin around without hitting the walls of the case, using your hot glue gun, glue everything into place.
Now that the motor casing is built, it's time to wrap your electrode (copper sheet) around the outside. Solder and/or glue the electrode into place.