I consider myself new to electronics so please bare with me. I live in the US and most outlets are 110V-120V AC
I was thinking of using an Arduino to create a speed control for an AC motor. I am looking for an easy and cheap solution.The motor is 120 VAC 4watts 60hz.
I know PWM is efficient way of speed control and that is why I am considering Arduino. I was thinking of using a mosfet for the switching but I think I should have something that isolates the HV from the LV so I don't destroy the Arduino. I also have the guts from an old phone charger that I am using to power the arduino.
Also I was thinking of making a full bridge rectifier for the ac to dc. but I am a little confused on the voltage output if I do that. On some forums I've read that the voltage is multiplied by ~1.4 when converted from AC to DC and others I am reading it's divided by ~1.4.