Abstract: Provided are a dry-state detecting method and an electronic device system for a fuel cell, which detect the dry state of an electrolyte film precisely, and a power control method for optimizing the control of a starting time on the basis of the dry state detected. The fuel cell is constituted to include an electrolyte film, and a catalyst electrode and a gas diffusion electrode disposed on the two faces of the electrolyte film. The dry-state detecting method detects the dry state on the basis of a displacement of the electrolyte film in an in-plane direction.

Abstract: In a power supply (AC adapter etc.) of an electronic device, a first Y capacitor and a second Y capacitor are connected in series between two AC input lines which are connected to an input AC cable of the power supply so that input AC voltage will be divided, and a third Y capacitor for the prevention of EMI (Electro-Magnetic Interference) is provided between a grounding line on the secondary side of a transformer of the power supply and the connection point between the first Y capacitor and the second Y capacitor. The capacitance of the second Y capacitor is set larger than that of the first Y capacitor and the second Y capacitor having the larger capacitance is connected to a neutral-side AC input line which is connected to the neutral terminal of an AC socket.

Abstract: In a power supply (AC adapter etc.) of an electronic device, a first Y capacitor and a second Y capacitor are connected in series between two AC input lines which are connected to an input AC cable of the power supply so that input AC voltage will be divided, and a third Y capacitor for the prevention of EMI (Electro-Magnetic Interference) is provided between a grounding line on the secondary side of a transformer of the power supply and the connection point between the first Y capacitor and the second Y capacitor. The capacitance of the second Y capacitor is set larger than that of the first Y capacitor and the second Y capacitor having the larger capacitance is connected to a neutral-side AC input line which is connected to the neutral terminal of an AC socket.

Abstract: In a power supply (AC adapter etc.) of an electronic device, a first Y capacitor and a second Y capacitor are connected in series between two AC input lines which are connected to an input AC cable of the power supply so that input AC voltage will be divided, and a third Y capacitor for the prevention of EMI (Electro-Magnetic Interference) is provided between a grounding line on the secondary side of a transformer of the power supply and the connection point between the first Y capacitor and the second Y capacitor. The capacitance of the second Y capacitor is set larger than that of the first Y capacitor and the second Y capacitor having the larger capacitance is connected to a neutral-side AC input line which is connected to the neutral terminal of an AC socket.

Abstract: A method of detecting the full-condition of a secondary battery of the present invention integrates the amount of charge current with a microcomputer in an environment of the kind causing a charge current to vary. When the charge current falls, the method interrupts a charging operation until an adequate charge current flows. A charging device for practicing the above method is also disclosed.