I’d seen some used split system air-con units outside a local air-con installer’s business.
Hmmm… would they contain anything useful? Below is the blower motor / blade assembly from one.
Maybe it could be used to generate a curtain of air in a Halloween display?
That will vary with the air-con brand and model.
A set screw accessed through a missing blade locks it in.
It seemed like the red wire was V+ and blue wire was ground.
The yellow wire ultimately went to the CPU board so would be enable / speed.
So… I hooked the red to +24V, blue to ground and yellow to +5V.
The motor sprang into life, although the airflow was unstable without any ducting.
This will go onto my Halloween parts shelf for a future project.