Brief clip with associated output data for small (900mm diameter) 3d printed wind turbine with 2.5amp stepper motor attached and used for power generation via bridge rectifier to 4.1v DC to charge 2 x 18650 battery pack (at max 4.1v)
This pack supplies power to a Raspberry Pi for monitoring performance (via boost module to 5.1v) with the turbine (hopefully) keeping the two 18650 batteries charged.
It is not looking to good so far, in part perhaps due to my lack of electrical engineering knowledge to more efficiently get very variable 0-28v turbine output up/down to 4.1v to charge the pack and then 5v to power the Pi.
All suggestions and comments very welcome.
I am thinking of attempting to make an assembly video in the near future.
UPDATE
21/10/2021: Catastrophic failure last night - see pictures. Sadly data was not being recorded as the battery pack had gone flat! The main body landed some 4.5m from the mast and 99% of one whole blade has yet to be found. Given the whole body and (some blades of course) came down with some force, it has become evident that this design is potentially very dangerous. There are no ties to prevent parts flying considerable distances in failure.
Even the 12 slip ring wires did not prevent the main body landing 4.5m away and landing with enough force to bend the M6 rod and shatter most components.
This unit was printed with PETG giving it much greater strength than PLA, despite being PETG the unit failed badly, luckily no one was hurt.
