I'd like to make a single phase generator with permanent magnets and coils in order to generate electricity just with my hand.
I already made a disc with 8 holes to put neodymium magnets in it and a support where I will put two layer PCB coils. The coils and the magnets are facing each other and the polarity of adjacent magnets are opposed.
Here is a close up of the coils. They were not designed for this project but I currently only have these.
I'm trying to find a way to connect the coils together and see the voltage generated on an oscilloscope.
I tried with just one coil and I'm seeing an alternating voltage with an amplitude of about 100 mV.
With two coils in series:
With 3 coils in series:
It looks like I need an odd number of coils, but why?