Abstract:
An electronic device includes a main body, a mounting device, and a supporting device. The mounting device attaches to the main body, and includes a mounting member, a bracket, and a latch. The bracket is mounted to the mounting member; the latch includes a securing section, and is slidably mounted to the bracket. The supporting device includes a retaining tab to engage the securing section. The supporting device is to be removed from the mounting device when the latch slides on the bracket to detach the securing section from the retaining tab.
Abstract:
An illuminating device and a luminance switching device thereof for controlling luminance of light emitting states of LED light source are provided. The luminance switching device includes a changeover switch which is electrically connected to the luminance switching device for switching the light-emitting states of the LED light source and has switching modes corresponding to the light-emitting states, a detecting circuit for detecting the switching mode corresponding to the changeover switch, a memory unit for storing luminance values of the LED light source corresponding to the switching modes detected by the detecting circuit, converting the luminance values of the LED light source into a luminance control signal, and transmitting the luminance control signal to the detecting circuit, and a power conversion circuit for receiving the luminance control signal transmitted from the detecting circuit, such that the LED light source produces luminance of the light-emitting states corresponding to the switching modes.
Abstract:
A drive circuit for light emitting diode (LED) is provided, which is used to drive a plurality of LEDs to emit light. The LEDs are connected in series into a plurality of LED strings. The drive circuit includes a power converter, a detection circuit, and a report circuit. The power converter provides a driving voltage to the LED strings, and the detection circuit detects a string voltage of each LED string, and compares the string voltage with a default reference voltage, so as to determine whether the string voltage is different from the reference voltage (which indicates that the LED string is operated under a non-default state), and sends a detection signal to the report circuit. The report circuit receives the detection signal and outputs the control signal to the power converter, such that the power converter adjusts the driving voltage according to the control signal.
Abstract:
An illuminating device and a luminance switching device thereof for controlling luminance of light emitting states of LED light source are provided. The luminance switching device includes a changeover switch which is electrically connected to the luminance switching device for switching the light-emitting states of the LED light source and has switching modes corresponding to the light-emitting states, a detecting circuit for detecting the switching mode corresponding to the changeover switch, a memory unit for storing luminance values of the LED light source corresponding to the switching modes detected by the detecting circuit, converting the luminance values of the LED light source into a luminance control signal, and transmitting the luminance control signal to the detecting circuit, and a power conversion circuit for receiving the luminance control signal transmitted from the detecting circuit, such that the LED light source produces luminance of the light-emitting states corresponding to the switching modes.
Abstract:
A memory card connector has an insulative frame receiving conductive terminals therein, a slide guiding mechanism assembled on the insulative frame, and a shell. The slide guiding mechanism includes a sliding bar, a guiding bar, and a resilient element. The sliding bar defines a guiding groove. A link portion is formed on an end of the sliding bar. A driving member is arranged at an end of the sliding bar and opposite the link portion, and has a pushing portion and a drawing portion. A driven member has a pushed portion and a drawn portion. The driven member cooperates with a stop member to control stopping of a member card. The slide guiding mechanism further includes a first conductor and a second conductor respectively communicating with ends of a detecting circuit of a circuit system for detecting ejection of the memory card at the earliest time.
Abstract:
A time domain symbol timing synchronization circuit is disclosed, which comprises: an autocorrelation function calculator for calculating cyclic prefix autocorrelation functions and an offset time estimator for searching peak positions of cyclic prefix autocorrelation functions to indicate symbol boundary of received communication symbols. The offset time estimator compares a current peak position and a previous peak position. If (a) the difference of the positions is larger than a threshold and (b) the current peak is smaller than a reference average peak, the current peak is determined as false; the offset time estimator weeds out and replaces the current peak position by the previous peak position; and the current peak is not introduced in the reference average peak calculation.
Abstract:
A chime bar assembly includes a hollow body with a resonation space defined therein and a top opening is defined in a top of the hollow body. A metal plate is located above the top opening and supported by two rubber plates. A hitting device is connected to the rear end of the hollow body and includes a case which includes lugs to which a pivotal end of a rod is pivotably connected. An operation unit is connected to the case and pushes the pivotal end of the rod so that the sphere is lowered to hit the metal plate.
Abstract:
A cable grounding clamp (10) includes a first grounding sheet (11), a second grounding sheet (12) and a connecting portion (13) connecting the first and the second grounding sheets. The first and the second grounding sheets respectively define a first and a second circular openings (110, 120) in the centers thereof. The connecting portion forms a passage (14) for receiving a cable (230). After the cable protrudes through the passage of the cable grounding clamp, a bolt (16) protrudes through the first and the second circular openings to engage with a printed circuit board (25). The connecting portion defines a soldering slot (130) therein, which facilitates the soldering process between the cable grounding clamp and metal braiding of the cable.
Abstract:
A case (1) includes a case body consisting of a top cover (10) and a bottom cover (20), a printed circuit board module (PCB module, 40) and a shielding member (50). The case body defines a receiving space (60) for receiving a portable storage peripheral equipment. The PCB module is received in the receiving space and comprising a printed circuit board (42) and an electrical connector (44) mounted on the printed circuit board. The shielding member is attached to an inner surface of the top cover and electrically connects with a grounding circuit trace of the printed circuit board. A copper foil (21) is attached on an inner surface of the bottom cover aligning with the PCB module and electrically connects with a resilient arm (56) of the shielding. The case has an improved shielding effect for effectively eliminating noise.
Abstract:
A collision avoidance method for transmitting data from multiple wireless tire condition sensors on a vehicle is executed by each wireless tire condition sensor having a unique ID and multiple different wake-up times. After the sensor is operated to sense data, the method has steps of reading the ID and computing a determination value with the ID and a variable, selecting one of the wake-up times according to the determination result, and after the selected wake-up time expires, transmitting the sensed data. As the selected wake-up times of the sensors differ from one another, data collision at the receiving end arising from data transmission from the sensors can be avoided. Additionally, besides the wake-up time, a time gap between data transmitted twice consecutively from each sensor can be employed to achieve data collision avoidance.