I’m here seeking help for my project. I have a fan motor of which I have attached the wiring diagram to this forum post.
My project is to replace the controller on my humidifier with the arduino so I can program it and make it a smart humidifier. The only thing that has stumped me is how my current humidifier controller is able to control the fan speed of this motor. Coming out of the motor are three wires, a blue one, a white one, and a black one. There are 9 speed settings on the humidifier controller and I would like to be able to duplicate that with the arduino. I’m not sure what hardware I need to make that possible. Could anyone assist me in figuring out what I need?