Abstract: A hand-held power tool includes a housing defining a first longitudinal axis and an illuminating assembly mounted to the housing. The illuminating assembly includes lighting elements distributed on the housing around the first longitudinal axis, a circuit board electrically connected to the lighting elements, a main body, and a fixing member. The lighting elements are supported by the circuit board. The main body partially covers the lighting elements and the circuit board. The lighting elements and the main body are fixed to the housing by the main body cooperative with the fixing member. The lighting elements are distributed around the first longitudinal axis so that light of the lighting elements can be emitted from multiple different angles, shadows are avoided in corresponding zones, and therefore the lighting elements can be called shadow-less lighting elements.

Abstract: A battery pack has a battery, a sensor module, a first power supply module and an indicating module. The sensor module is used to detect a change in an electrical field or magnetic field nearby the battery pack and to activate the indicating module in response to the change being detected.

Abstract: An electric power tool includes a motor, a power supply circuit for supplying power to the motor, and a control device which is able to measure current of the motor and control duty cycle of the power supply circuit. When the measured current of the motor is greater than a predetermined current value, the duty cycle of the power supply circuit is increased to a first predetermined value. If the current of the motor is still greater than the predetermined current value, the duty cycle of the power supply circuit is decreased to a second predetermined value such that the current of the motor is equal to or less than the predetermined current value.

Abstract: An electric power tool includes a motor, a power supply circuit for supplying power to the motor, and a control device which is able to measure current of the motor and control duty cycle of the power supply circuit. When the measured current of the motor is greater than a predetermined current value, the duty cycle of the power supply circuit is increased to a first predetermined value. If the current of the motor is still greater than the predetermined current value, the duty cycle of the power supply circuit is decreased to a second predetermined value such that the current of the motor is equal to or less than the predetermined current value.

Abstract: A battery pack has a battery, a sensor module, a first power supply module and an indicating module. The sensor module is used to detect a change in an electrical field or magnetic field nearby the battery pack and to activate the indicating module in response to the change being detected.

Abstract: A power tool includes a function device for performing the main function of the power tool, a positive connecting terminal for connecting with a positive pole of a power supply, a negative connecting terminal for connecting with a negative pole of the power supply, a main switch for controlling the connection between the output terminal and the power supply, an illumination circuit having at least one illumination member, an illumination control circuit for controlling the connection between the illumination member and the power supply, and a delay circuit for controlling the illumination control circuit so that the illumination member can still illuminate when the main function of the power tool is shut off.

Abstract: A hand-held power tool includes a housing defining a first longitudinal axis and an illuminating assembly mounted to the housing. The illuminating assembly includes lighting elements distributed on the housing around the first longitudinal axis, a circuit board electrically connected to the lighting elements, a main body, and a fixing member. The lighting elements are supported by the circuit board. The main body partially covers the lighting elements and the circuit board. The lighting elements and the main body are fixed to the housing by the main body cooperative with the fixing member. The lighting elements are distributed around the first longitudinal axis so that light of the lighting elements can be emitted from multiple different angles, shadows are avoided in corresponding zones, and therefore the lighting elements can be called shadow-less lighting elements.

Abstract: A memory system comprises a master control module, a memory control module, a nonvolatile memory and a cache, wherein the memory control module is connected with the master control module, the nonvolatile memory and the cache are respectively connected with the memory control module; and the memory control module is configured to, when the master control module sends a write command for the nonvolatile memory, store data to be written in the nonvolatile memory in the cache according to the write command, and release the cache used for storing the data to be written in the nonvolatile memory after finish of the write operation to the nonvolatile memory.