How to control single phase motor using arduino

Help me to control the speed .

Gonna need a lot more information. How about a circuit diagram (even hand drawn and take a pic) as well as what you are planning to do.

samcolico22:
Help me to control the speed .

Use a PWM

Some details of the motor would be useful too. "Help me control the speed of something I'm not telling you anything about" doesn't give us much to work with.

Steve