The Anti-Disturber is a method to let people approaching a room know that the person inside the room is occupied and does not wish to be disturbed. The Anti-Disturber allows the user to set a timer for the length of quiet time using a joystick and LED display then places the device outside their door. Until the quiet time is up, motion of an approaching person is detected by the PIR sensor and a red light and warning appears to not disturb. Note: this was a group acedemic project.