A wind turbine made from an old fan, able to rise values of embedded sensors (temperature, humidity, atmospheric pressure and wind speed) over RF 433 Mhz. The development version will be able to recharge the battery from wind energy.
The internal design is based on an Arduino Nano. In order to save power consumption, the wind turbine has a standby mode that disables the active components.
The case is in fact a recovery of a protected electric wires box.
Self powered (dynamo + battery)
The next version will convert energy from a dynamo. Gears allow to convert the mechanical energy produced by the propeller.
https://www.sculpteo.com/blog/fr/2016/03/15/prototypez-vos-engrenages-avec-limpression-3d/