I need to know if it is possible to control the speed of a 220 volt ac motor (from a washing machine so I assume it is 3 phase) but the system has to be compatible with the arduino. So if it is please let me know how. Thanks
that would be very hard since arduino is low voltage dc and your motor is very high voltage ac so first off the voltages are incompatible maybe and ac-dc relay this could help you forum.arduino /index.php/topic,...
Arduino 3 Phase Motor Control