Abstract: A biochemical sensor includes a substrate with a printing surface, an intermediate layer, and a cover. The printing surface includes a reactive film, two electrode films, a conductive electrode film, and a referential electrode film. The conductive electrode film is arranged between the two electrode films. Each ends of the two electrode films contacts with the reactive film. One end of the conductive electrode film, proximate to the reactive film, contacts with one of the two electrode films. The referential electrode film and one of the two electrode films are arranged on the relative two sides of the printing surface. One end of the referential electrode film extends to contact with the reactive film. The intermediate layer has a notch corresponding to the reactive film, and the cover has an test slot corresponding to the notch. The intermediate layer and the cover are sequentially covered on the substrate.

Abstract: A keyboard with extension keys and method for setting key codes of the extension keys thereof is described. The main body of the keyboard has a setting key and extension keys disposed thereon, and has a keyboard controller and a memory disposed therein. The keyboard controller is used to control the main body and the memory is used to store the key codes of the extension keys. The setting key is used to actuate a setting routine to set the key codes of the extension keys and then, a user can choose one of the extension keys and input a setting string by pressing standard keys. The setting string is stored in the memory as the key code of the chosen extension key. Thereby, the user can define the key codes of the extension keys so that the extension keys can be full of variety.

Abstract: A wireless mouse comprises a micro movement sensor, a CPU a high-frequency transmission module, a coordinate input module, an electronic switch, and a battery wherein coordinate input module is coupled to CPU, and electronic switch is coupled to CPU, high-frequency transmission module, and micro movement sensor, and battery respectively. Electronic switch is deactivated when mouse is not moved. When mouse is moved, micro movement sensor is activated to generate a signal which is in turn sent to the switch for activation, thereby enabling CPU and high-frequency transmission module. By sensing a movement of the mouse, a power saving of all components thereof is achieved.