This windmill/ventilator is about 21cm high (rotor excluded).
I planned it as solar powered windmill, but it’s winter and the sun is hardly shining, so...
It is seperated into three parts:
Three batteries and two contacts are placed in the stand, switch and electromotor are mounted in the head. The rotor is plugged onto the motor’s shaft.
- 3x AA batteries
- 1x electromotor
- 1x switch (SMD)
- about 40cm of cables
- optional: 2x battery contacts (one with a spring)