Abstract: A motor control system includes an MMI (man machine interface), an upper-controller, and a motor driver connected in that order. The upper-controller includes a motherboard, a communication control module, and a servo driven control card connected in that order. The motherboard is connected to the MMI and includes a processor. The communication control module includes a plurality of control cards. A control signal is inputted into the MMI and sequentially processed by the processor, the communication control module, and the servo driven control card. A driven signal is outputted from the servo driven control card to the motor driver to drive a motor.

Abstract: A camera device includes a housing, a lens module, a holder, an image sensor, a driving apparatus, and an elastic member. The housing includes a front housing and a back housing. The lens module is assembled on the outer surface of the front housing away from the back housing. The holder is received between the front housing and the back housing, the holder is movable along the optical axis of the lens module and defines a screw hole thereon. The image sensor is fixed on the holder and facing the lens module. The driving apparatus is fixed on the back housing, the driving apparatus includes a motor and a lead screw rotated by the motor, the lead screw is inserted into and meshing with the screw hole for moving the holder. The elastic member has two ends thereof connecting to the holder and the back housing respectively.

Abstract: A size and position detecting system includes a laser sensor and a controller. The laser sensor includes an emitter emitting a laser beam to a receiver. The controller is configured to compute a first time of how long the emitter emits the laser beam and a second time of how long the receiver receives the laser beam when a cutting tool moves along a first direction perpendicular to and coplanar with a straight line connecting the emitter and the receiver. The controller is configured to record a first position of the cutting tool at a moment when the second time is less than the first time, and a second position of the cutting tool when the second time remains changeless for a predetermined amount of time, to determine whether the cutting tool is off-centered according coordinates difference between the first and second positions along the first direction.

Abstract: A light-emitting diode (LED) string is provided. The LED string includes a power plug configured for connecting with a power source to power the LED string; one or more LED sockets configured for electrically connecting with the power plug; one or more LEDs configured for being installed on and electrically connecting with the LED sockets; and a control module configured for being electrically connected with anyone of the LED sockets. The control module includes a control circuit, an input terminal and an output terminal, the control circuit electrically connects with one of the LED sockets via the input terminal and the output terminal and controls a current flowing through the LED string to change from a first value to a second value, thereby controlling the LED string to light.

Abstract: An external universal serial bus (USB) card reader includes a cover, a circuit board movably received in the cover, a USB connector, and a connector. The USB connector is mounted to a front end of the circuit board. The connector is mounted to a back end of the circuit board and electrically connected to the USB connector. A through cutout is defined in the cover to allow the USB connector pass through. An inserting slot is defined in the cover to allow a memory card pass through. The USB connector is operable to be forced by the memory card to drive the circuit board to move in the cover, resulting in the USB connector extending out of the cover or retracting back into the cover through the through cutout.

Abstract: A surveillance apparatus, comprising: a holder; a first adjusting member disposed on the holder, the first adjusting member comprising a first annular plate and two extending portions each defining a second through hole; a second adjusting member comprising a second annular plate and a third annular plate; an image pick-up device sleeved on the third annular plate; a third adjusting member comprising a fourth annular plate, a pair of handles, and two fasteners, the handles each defining a fifth through hole corresponding to the second through holes, the fourth annular plate rotatably sleeves on the third annular plate; the first adjusting member and the third adjusting member is assembled together.

Abstract: An exemplary mounting apparatus includes a connector and two latching mechanisms connected to two opposite ends of the connector. The connector defines a slot in a top surface thereof, and two sliding grooves in two opposite side surfaces thereof. Each sliding groove extends though the two side surfaces. Each latching mechanisms includes a guide pin and a latching member. The guide pin is slidably received in a corresponding sliding groove. The latching member includes a latching portion for engaging with an expansion card, two feet connected to two ends of the guide pin, and two connecting arms each connected between one end of the latching portion and a corresponding foot. When the guide pin is pulled by the latching member to move from a bottom end to a top end of the sliding groove, the expansion card is pushed out of the slot of the connector by the guide pin.

Abstract: A sound-based focus system includes an imaging device and focus controller. The imaging device is configured for capturing an image. The focus controller includes a sound detecting module and a control module. The sound detecting module is configured for obtaining the position coordinates of a sound source. The control module is configured for controlling the imaging device to focus on the sound source according to the position coordinates thereof.

Abstract: A detection and alarm circuit includes a transformer, a rectifier, and an alarm. A first input terminal of the transformer is connected to a ground terminal of an electronic device, and a second terminal of the transformer is grounded. A first output terminal of the transformer is connected to a first input terminal of the rectifier, and a second output terminal of the transformer is connected to a second input terminal of the rectifier. A first output terminal of the rectifier is connected to a first terminal of the alarm. A second output terminal of the rectifier is connected to a second terminal of the alarm.

Abstract: A lens module includes a lens and an opaque plate. The lens is received in the main body, and includes an imaging portion and a non-imaging portion surrounding the imaging portion. An annular flange is extended upward from the image-side surface of the non-imaging portion. The flange and the image-side surface defines a receiving groove. The opaque plate includes a circular opening corresponding to the imaging portion and a lightproof solid body surrounding the opening. The opaque plate is disposed on the image-side surface of non-imaging portion of the lens with the lightproof solid body received in the receiving groove.

Abstract: When the fan inserted in the fan header is a 4-pin fan, the control chip outputs PWM signals with different duty factors to the control pin of the fan header, to automatically change the rotary speed of the 4-pin fan. When the fan inserted in the fan header is a 3-pin fan, the control chip outputs the PWM signals whose duty factor changes with temperature of a chip under the fan to control the first power source to provide a voltage to the adjusting circuit. The adjusting circuit rectifies the voltage output from the first power source as an analog voltage signal to the control circuit. The control circuit controls the third power source to output a changeable driving voltage to the power pin of the fan header to control the rotary speed of the 3-pin fan.

Abstract: A light guide is a quarter of cylinder in shape and includes a cylindrical emitting surface, an incident surface adjacent to and facing away from the cylindrical emitting surface, and a connecting surface connecting the cylindrical emitting surface and incident surface. The light guide defines five a number of grooves in the incident surface. Each groove is bounded by two surfaces. The inclined angle of the two surface is designed to satisfy a set of conditions to improve light uniformity of the cylindrical emitting surface.

Abstract: A system can test network performance of an electronic device via transmitting a testing file with a first designated name to a number of computers connected to the electronic device, obtaining comparison files from the number of computers after running the testing file, and replacing the names of the comparison files with standard names. The network performance of the electronic device can be confirmed via contents of the comparison files.

Abstract: An image sensing module includes a printed circuit board, an image sensor, and a color filter exchanging system. The image sensor positioned between the printed circuit board and the color filter exchanging system is assembled on the printed circuit board. The color filter exchanging system aligning with the image sensor fastens to the printed circuit board. The color filter exchanging system includes a stand, a driving module and a filter assembly. The stand fastening to the printed circuit board defines an opening revealing the image sensor. The driving module slides the filter assembly within the stand. The filter assembly includes a frame and a visible light bandpass filter and an infrared bandpass filter assembled to the frame. In different modes, the driving module drives the filter assembly so that the visible light bandpass filter or the infrared bandpass filter aligns with the image sensor by way of the opening.