To help people with hand disability or spinal cord injury to use computer in a hand-free manner

a tilt mouse is designed. MSP430F5529 is used as main control chip to make the acceleration sensor to measure the tilt angle of head and transform the angle into movement of cursor; voice-activated switches using voice-activated and relay modules are built to realize the mouse click; nRF2401 module is used to realize the wireless communication between mouse system and computer. The tilt mouse can make user controlling movement of cursor by tilting head and realize the mouse click by blowing into the air-blowing switches. The tilt mouse can help people with handdisability or spinal cord injury move cursor in hand-free manner efficiently and provide an access to computer for them.