a rotary input apparatus is disclosed . as the rotary input apparatus comprises a rotatable wheel ; a magnet joined to a surface of the wheel to co - operate with the wheel and magnetized to have alternating n - and s - poles ; an electromagnet part positioned facing the magnet and magnetized to have at least n - or s - pole ; a printed circuit board , to which the electromagnet part is joined , including a driving part which supplies an electrical current to the electromagnet part , and a detection element which receives electrical power from the driving part for operation , is positioned facing the magnet , and which detects the rotation of the magnet ; a control part which receives a signal and controls the operation of the driving part in correspondence with the received signal ; and a base to which the printed circuit board is secured , various types of input may be made through the rotation speed , direction , and angle , etc ., and rotation or vibration may be obtained from electrical external signals , to provide an improved visual service .