Abstract: The application discloses a support device, mounted in a portable electronic device, including an upper-cover shell, a base shell, and a pivot. The support device includes a cam structure, a first rod member, a second rod member, and a support member. The cam structure is connected to the pivot. The first pivot portion and the second pivot are pivotally connected to the base shell. The first rod member is in contact with the cam structure, and includes a first slide portion. The second rod member includes a second slide portion, movably connected to the first slide portion. The support member penetrates through an opening of the base shell, where a top surface of the support member and the second rod member are in contact with each other.

Abstract: The application discloses a support device, mounted in a portable electronic device, including an upper-cover shell, a base shell, and a pivot. The support device includes a cam structure, a first rod member, a second rod member, and a support member. The cam structure is connected to the pivot. The first pivot portion and the second pivot are pivotally connected to the base shell. The first rod member is in contact with the cam structure, and includes a first slide portion. The second rod member includes a second slide portion, movably connected to the first slide portion. The support member penetrates through an opening of the base shell, where a top surface of the support member and the second rod member are in contact with each other.

Abstract: A power drive system of light-emitting diode (LED) strings includes an isolation transformer, a current-sharing capacitor, two rectifying units, and a current control integrated circuit (IC). The isolation transformer has a primary-side winding and a secondary-side winding with a dotted terminal and a non-dotted terminal. The current-sharing capacitor is connected to the dotted terminal at one terminal thereof. One rectifying units is connected to the other terminal of the current-sharing capacitor, and the other rectifying unit is connected to the non-dotted terminal of the secondary-side winding. Each rectifying unit is connected to one LED string. The current control IC is connected between common points of the rectifying units and corresponding anode terminals of the LED strings and corresponding cathode terminals of the LED strings.

Abstract: This DigiFlux™ digital gas flow sensor (DigiFlux™) can measure the gas flow by its Hall effect gas sensor. DigiFlux™ [FIG. 1] is based on the Hall effect. In DigiFlux™, an air-float with a small magnetic-iron attached to its bottom, is upright on a Hall effect sensor made by a conductor with I/O connector. When the air-float moves up or down caused by the gas influx pressure, the magnetic-iron in the bottom of air-float will cause electromagnetic sense, and will generate Hall voltage (Vh) signal on Hall effect sensor. The Vh signal will be sent to amplifier then to the MCU/DSP for analog-to-digital conversion, then the gas influx flow will be sensed as digital signal and can be processed by MCU/DSP. Based on functional program one can set different modes to measure gas flow. DigiFlux™ can measure gas flow with high-precision even with a small influx of gas.

Abstract: A digital gas flowmeter is described as follows: the flowmeter can measure gas flow by digital signal, a optical or magnetic sensor can sense the rotation of a wheel rotating by the pressure of gas that enters into a gas chamber built in the flowmeter; the measure mode can be programmable in on-chip CPU; the digital gas flowmeter includes a gas chamber, which formed by shell, wheel, rotor sensor, gas-in sensor, cone shaped gas-in tube and gas-out tube. The rotor sensor connects with a programmable on-chip CPU, with the rotor sensor recognizes the rotation mechanical signal of the wheel in gas chamber, and converts mechanical signal to digital signal and sends to CPU; this signal can be processed in certain modes programmed by CPU and CPU sends the final result data of gas flow to a display device showing gas usage.