Wheel assembly and associated input device

An input device (200), comprising:

• a wheel (3);
• a magnet (2) coupled to the wheel (3) for generating a magnetic field and operable to rotate with a rotation of the wheel (3);
• at least three magnetic sensors (1) for sensing an absolute angular position of the wheel (3), the at least three magnetic sensors (1) being arranged within a plane (10) that is located in a predetermined distance (Y) from the magnet (2) and substantially parallel to a main direction (B) of the magnetic field generated by the magnet (2);
• an analog-to-digital convertor (ADC) (210) for converting a magnetic field detected by the at least three magnetic sensors (1) into a measurable electrical signal;
• and
• a gain control mechanism (220) for adjusting an intensity of the electrical signal.

A method of manufacturing a wheel assembly (100), comprising:

• providing a wheel (3);
• coupling a magnet (2) for generating magnetic field to the wheel (3) in such a way that the magnet (2) rotates with a rotation of the wheel (3);
• providing at least three magnetic sensors (1) for sensing an absolute angular position of the wheel (3);
• and
• arranging the at least three magnetic sensors (1) within a plane (10) that is located in a predetermined distance (Y) from the magnet (2) and substantially parallel to a main direction (B) of the magnetic field generated by the magnet (2).