Abstract:
An encrypted hard disk device is provided, including a near-field communication (NFC) sensing module, a processor, a storage unit, and a power switch. The NFC sensing module is configured to read a user identification (UID) of at least one sensor element. The processor is electrically connected to the NFC sensing module and the storage unit. The processor receives the UID and generates a control signal when the UID is approved. The power switch is electrically connected to the processor and the storage unit and maintains a conducting state according to the control signal and supplies power to the storage unit for accessing the storage unit.
Abstract:
A near field communication device and a method of determining the position of a tag are provided. The near field communication device includes a first coil, a second coil, and a control circuit. One end of the first coil is coupled to a first grounding end. One end of the second coil is coupled to a second grounding end. The control circuit includes a first current pin and a second current pin. The first current pin is coupled to the other end of the first coil. The second current pin is coupled to the other end of the second coil. The control circuit transmits a first current signal to the first coil by the first current pin, and transmits a second current signal to the second coil by the second current pin, the control circuit analyzes the change of the first current signal and the change of the second current signal to determine whether the position of a tag is close to the first coil or close to the second coil.
Abstract:
A heat dissipation method applied to an electronic device including an electronic component is provided. The heat dissipation method includes: sensing a temperature of an electronic component by the temperature sensor; determining whether the temperature of the electronic component is larger than a threshold temperature; determining a rotation speed rank corresponding to a basic rotation speed and intermittently accelerating the basic rotation speed in the rotation speed rank while the sensed temperature of the electronic device is larger than a threshold temperature.
Abstract:
A heat dissipation method applied to an electronic device including, an electronic component is provided. The heat dissipation method includes sensing a temperature of an electronic component by the temperature sensor; determining whether the temperature of the electronic component is larger than a threshold temperature; determining a rotation speed rank corresponding to a basic rotation speed and intermittently accelerating the basic rotation speed in the rotation speed rank while the sensed temperature of the electronic device is larger than a threshold temperature.