This is a working hand cranked power generator.
The rotor, in the picture, spins up to 1500 rpm, and produce about 30 watts.
I recommend building the rotor as seen in the fbx-file, for more power.
Needless to say – this is a huge print! Minimum 200+ hours....
On the hardware side you need 96 neodymium magnets (25mm diameter x 10mm),
about 1,3kg of enameled copper wire, preferably six steel plates, a pile of nuts & bolts, electronics - including an Arduino nano, display, bridge rectifier(s), diodes, capacitors, resistors, voltage regulators etc.
If you want to etch the PCB yourself, you will need a blank 160mm x 100mm copper board and your preferred chemicals.
Until I release a set of instructions, consider this a work of art ;)