Abstract: A motor sensing circuit with transient voltage suppression includes a sensing unit and an impulse absorber. The sensing unit has an electrical switch generating a pulse sensing signal when switching and a signal output terminal electrically connecting to the electrical switch and outputting said pulse sensing signal. The impulse absorber has a first terminal connecting to the signal output terminal of the sensing unit and a second terminal being grounded. Consequently, the impulse absorber is able to provide a route for a transient current to be drained away, with the transient current being generated by an impulse inputted the motor sensing circuit through the signal output terminal.

Abstract: A drag-stabilized water-entry projectile having a projectile body, one or more drag-stabilizing elements, such as fins, flares or canards, and one or more attachment members adapted to hold the one or more drag-stabilizing elements to the projectile body. The one or more attachment members are coated with a thermally reactive material. A projectile and cartridge assembly has a shear pin, a projectile having a first cutout portion, the cutout portion sized to receive the shear pin. The assembly also includes a sabot configured to house the projectile and having a second cutout portion, the second cutout portion sized to receive the shear pin. The cutout portion is positioned to provide an offset region between an aft end of the projectile and a base of the sabot.

Abstract: A motor sensing circuit with transient voltage suppression includes a sensing unit and an impulse absorber. The sensing unit has an electrical switch generating a pulse sensing signal when switching and a signal output terminal electrically connecting to the electrical switch and outputting said pulse sensing signal. The impulse absorber has a first terminal connecting to the signal output terminal of the sensing unit and a second terminal being grounded. Consequently, the impulse absorber is able to provide a route for a transient current to be drained away, with the transient current being generated by an impulse inputted the motor sensing circuit through the signal output terminal.

Abstract: A mini-fan with an easy-starting structure is proposed, which includes a fan housing a rotor, and a bottom. The fan housing has a plurality of coils, a control unit, and at least one globe-shaped attractor, with the at least one globe-shaped attractor being made of conductive magnetic material and arranged between adjacent two of the coils. The rotor has a permanent magnet ring facing the coils of the fan housing and having at least one pair of opposite magnetic poles, with each magnetic pole providing a high-intensity area. Consequently, one of the high-intensity areas is attracted by and faces the at least one globe-shaped attractor when the rotor is held at a stop position.

Abstract: A mini-sized heat-dissipating module includes a miniature heat-dissipating plate and a miniature fan unit. The miniature heat-dissipating plate has an assembling space, at least one airflow channel and at least one engaging portion. The assembling space and the airflow channel are provided on a top surface of the miniature heat-dissipating plate, wherein the assembling space is arranged at an end of the airflow channel. The miniature fan unit has an air inlet, an air outlet, a fan wheel and at least one engaging portion. The engaging portion of the miniature fan unit is engaged with that of the miniature heat-dissipating plate when assembled. An adhesive layer is further provided to combine the miniature fan unit with the miniature heat-dissipating plate.

Abstract: A heat dissipating fan with a wire retaining device includes a housing having a first end wall and a second end wall respectively on two ends thereof. A peripheral wall is formed between the first and second end walls. At least one of the first and second end walls includes a slot extending from a side through the other side thereof. A restraining member includes a first end fixed to the peripheral wall and a second, free end not connected to the peripheral wall, forming a guide opening between the free end of the restraining member and the peripheral wall. A conductive wire is insertable through the guide opening into a space between the restraining member and the peripheral wall.

Abstract: A motor comprises an axle tube, a rotor, and a member. The axle tube includes a hole, and a stator is mounted to an outer periphery of the axle tube. The rotor includes an end wall having a shaft base from which a shaft extends. An annular wall extends from an inner face of the shaft base and surrounds the shaft. The member is mounted in the hole of the axle tube and rotatably receives the shaft of the rotor. The member includes a reduced section, forming a gap between the reduced section of the member and the axle tube. The annular wall extends into the gap between the reduced section of the member and the axle tube.

Abstract: A heat sink includes a plurality of spaced laminas made of a thermally conductive material. Each of the laminas is integrally formed with a pair of convexo-concave spacers that each project from a first face of the lamina and define a cavity in a second face of the same lamina. Furthermore, each of the convexo-concave spacers is adapted to be partially and tightly fitted in a mating cavity of the next lamina.

Abstract: A motor comprises an axle tube, a rotor, and a member. The axle tube includes a hole, and a stator is mounted to an outer periphery of the axle tube. The rotor includes an end wall having a shaft base from which a shaft extends. An annular wall extends from an inner face of the shaft base and surrounds the shaft. The member is mounted in the hole of the axle tube and rotatably receives the shaft of the rotor. The member includes a reduced section, forming a gap between the reduced section of the member and the axle tube. The annular wall extends into the gap between the reduced section of the member and the axle tube.

Abstract: The dual current-limiting circuit for dc brushless motor includes an over-current detective circuit, an operation detective circuit, and a current-limiting circuit. The over-current detective circuit produces a voltage signal being used to determine whether the motor has been input over current. The operation detective circuit also produces a voltage signal being used to determine whether the motor is operated in normal. The current-limiting circuit decides to turn on a first switch of a first current-limiting circuit and to subsequently turn on a second switch of a second current-limiting circuit depending upon the two voltage signals. The current-limiting circuit is capable of suppressing current passing through a coil at low voltage level, which is inadequate to damage a driver circuit and still adequate to restart the motor if the great abnormal input current is eliminated.