Abstract: A computer-based method and a computing device for checking differential pairs of a printed circuit board layout are provided. The computing device determines the via pitch between switching vias of a differential pair according to the coordinates of the centers of the switching vias, determines the via gap between the switching vias of adjacent two differential pairs according to the radius and the coordinates of the centers of the switching vias, and determines that the switching vias does not satisfy design standards if the via pitch does not fall in an input via pitch range, or the via gap does not fall in an input via gap range.

Abstract: In a method for checking layout of a printed circuit board (PCB) using an electronic device, a power line is selected from a layout diagram of the PCB. The method searches for one or more signal lines which are overlapping with the selected power line from the layout diagram of the PCB. The method further locates attribute data of the searched signal lines and the selected power line in the layout diagram of the PCB, and displays the attribute data of the searched signal lines and the selected power line on a display device of the electronic device.

Abstract: In a computing device, computerized method, and a non-transitory storage medium, plug-in capacitors are selected from capacitors in a wiring diagram according pin information of the capacitors. A straight line is constructed for each of the plug-in capacitors according to size of holes where pins of the plug-in capacitor are to be inserted into. Paths of all transmission lines in the wiring diagram are obtained, and a determination of, whether any of the paths has at least one intersection point with at least one constructed straight line, is made. One or more paths, which have at least one intersection point with at least one constructed straight line, are recorded into a path list. The path list is then outputted using the computing device.

Abstract: An electronic device and method of automatically testing the transmission lines of a PCB. Design requirements of transmission lines are predetermined and a wiring diagram is acquired according to a designated wiring diagram storage path. Some basic parameters of each transmission line of the diagram are applied in excluding one or more transmission lines which may not meet the design requirements, then, the excluded transmission lines are marked and/or highlighted. A report of the transmission lines is generated using a report template.

Abstract: A printed circuit board includes a first to a fifth connector pads, a first to an eighth coupling capacitor pads, a first to a tenth transmission lines, a first via and a second via, a first to a fourth sharing pads, and a voltage converting circuit. The printed circuit board is operable to selectively support different types of connectors.

Abstract: In a method for checking layout of a printed circuit board (PCB) using an electronic device, a signal line is selected from a layout diagram of the PCB. The method searches for signal lines which have an acute angle when deviating from a straight line in the layout diagram of the PCB. The method further locates attribute data of the searched signal lines in the layout diagram of the PCB, and displays the attribute data of the searched signal lines on a display device of the electronic device.

Abstract: An overdrive topology structure for transmission of a RGB signal includes a signal sending terminal, a signal receiving terminal, and a transmission line to transmit the RGB signal from the signal sending terminal to the signal receiving terminal. The transmission line is divided into a number of section transmission lines. A node is formed between every two section transmission lines. An impedance of a first section transmission line approaching to the signal sending terminal is less than an impedance of a second section transmission line approaching to the first section transmission line to overdrive the RGB signal at a first node between the first and second section transmission lines. At least one node except the first node is grounded via a resistor. An equivalent resistance of the resistor is equal to a resistance of the first resistor.

Abstract: A printed circuit board includes an insulation layer and a signal layer attached to the insulation layer. The signal layer includes a pair of differential transmission lines. Width W of each of the differential transmission lines is changed according to change of space S between the differential transmission lines, based on the following formula: W = C ? ? 1 × H × ( C ? ? 2 × H 0.8 ? W 0 + T ) C ? ? 3 × ? C ? ? 4 × S 0 H - 1 1 - C ? ? 3 × ? C ? ? 4 × S H - 1.25 ? T In above formula, C1=7.475, C2=5.98, C3=0.48, C4=?0.96, H is a thickness of the insulation layer, W0 is an original width of each of the differential transmission lines, and S0 is an original space between the differential transmission lines, and T is a thickness of each of the differential transmission lines.

Abstract: A computer-based method and a computing device for checking signal transmission lines of a printed circuit board (PCB) layout are provided. The computing device identifies differential pairs in a currently run PCB layout according to an information file for the currently run PCB layout, checks whether any signal transmission line is routed between switching vias of each differential pair according to the information file for the currently run PCB layout, and displays a routing error window to display information of each misrouted signal transmission line.

Abstract: A reversing transmission includes a shaft, a retainer, a spacing collar, reversing members, two gears and two covers. The holder is sleeved on the shaft with spaced sliding notches formed thereon. The spacing collar is mounted on an outer surface of the retainer. The reversing members each include two spaced swing plates, with two reversed spiral teeth dented on two diagonal half surfaces of the two spaced swing plates. The reversing members slide into the sliding notches of the holder, with the two swing plates of each reversing member distributed at different sides of the spacing collar. Each of the gears has a group of spiral teeth formed on the inner side for engaging with the group of spiral teeth of the reversing members, and cogs formed on the outer circumference surface. The covers are mounted on two opposite ends of the holder to keep the reversing members in position.

Abstract: A signal transmission apparatus includes two circuit layers. First and second ground sheets each has a rectangular area are arranged in the two circuit layers respectively. A third ground sheet is arranged between the two circuit layers. A differential pair includes a transmission line arranged between the first and third ground sheets and a transmission line arranged between the second and third ground sheets. The first to third ground sheets have same electric potential. Projections of the two rectangular areas on a surface where the third ground sheet in only have one common border with the third ground sheet. The third ground sheet is formed by extending the common border along a signal transmission direction. The differential pair includes a number of section pairs each composed of two sections arranged in the two transmission lines symmetrically. Every two adjacent section pairs are equivalent to a capacitor and an inductor.

Abstract: A computing system includes a drawing unit and a layout unit. The computing system sets components parameters to components of a circuit diagram of a printed circuit board (PCB). The drawing unit draws the circuit diagram by using the components with the components parameters. If the drawing unit wants to use a component more than once, the computing system copies the component and the corresponding components parameters. The drawing unit uses the copied components and the corresponding parameters. If the circuit diagram has been drawn, the layout unit loads the circuit diagram and wires the PCB according to the components and the components parameters in the circuit diagram.

Abstract: A computer-based method and a computing device for checking stub lengths of via stubs of a printed circuit board (PCB) layout are provided. The computing device displays a check interface, selects signal transmission line from a currently run PCB layout through the check interface, receives a reference stub length input through the check interface, and determines the actual stub length of each via stub of each via each selected signal transmission line connected to. The computing device further determines that a design of one via stub satisfies the design standards, if the actual stub length of the one stub via is less than or equal to the reference length, and determines that a design of one via stub does not satisfy the design standards if the actual stub length of the one via stub is greater than the reference stub length.

Abstract: A printed circuit board layout method includes the following steps. Providing a printed circuit board with a first layout layer and a second layout layer. Disposing a pair of first conducting portions on the first layout layer to electrically couple to a control chip. Sequentially disposing a pair of second conducting portions, a pair of third conducting portions, and a pair of fourth conducting portions on the second layout layer. Providing a pair of connecting portions to connect the first conducting portions and the third conducting portions. Electrically connecting an electronic device to the second conducting portions, and providing a first and second components are coupled with the third and fourth conducting portions, or electrically coupling the electronic device to the fourth conducting portions, and providing the first and the second components are coupled with the second and third conducting portions.

Abstract: In a method for controlling motion of a mechanical arm, the method moves the mechanical arm horizontally or vertically so that an image capturing device of the mechanism arm focuses on an object. The contours of the object are analyzed, and a central area of the object is established. By making the center of the image area of the image capturing device coincide with the center area of the object at least twice, the method records two positions of the mechanical arm, and calculates a total apparent displacement value of the object and a distance between the object and camera lens of the image capturing device according to the first position, the second position of the mechanical arm and the total apparent displacement value of the object. The method ensures accurate positioning of the mechanical arm.

Abstract: Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, thickness of a dielectric layer, and thickness of an insulation tube can be changed. When any component needs to be replaced, each cover is rotated, with connection partitions moving to two slots of an insulation portion, to detach the filter.

Abstract: A computing device reads a printed circuit board (PCB) layout file from a storage device. The PCB layout file includes arrangement information of signal lines, power lines, and power through-holes arranged on a PCB. Furthermore, the computing device sets a reference distance between a selected power through-hole and a neighboring signal line, and searches for one or more line segments of one or more signal lines where the a distance between each of the one or more line segment and the selected power through-hole is less than the reference distance.

Abstract: A robotic arm control system is provided. In, the robotic arm control system, any three points A, B, and C of an object to be determined are picked, thereby creating an original coordinate system. A robotic arm is directed to rotate around the x-axis of the original coordinate system to reach the points B and C. During the rotation of the robotic arm, the three points A, B, and C are recorded by a visual process. A non-linear mapping relation of the original coordinate system and the operation coordinate system is calculated according to length ratios, an angular ratio, and a differential ratio of the difference of the length ratios to the angle between the line A-B and the line A-C, thereby controlling the movement of the robotic arm according to the non-linear mapping relation. The disclosure further provides a robotic arm control method.

Abstract: A computer system includes a motherboard with first and second storage device interfaces and first to third memory slots, and first to third serial advanced technology attachment dual-in-line memory modules (SATA DIMMs). First and second extending boards are extended from two opposite ends of each SATA DIMM, arranged with first and second edge connectors, respectively. The first edge connector of the first SATA DIMM is connected to the first storage device interface. The second edge connector of the first SATA DIMM is connected to the first edge connector of the second SATA DIMM. The second edge connector of the second SATA DIMM is connected to the first edge connector of the third SATA DIMM. The second edge connector of the third SATA DIMM is connected to the second storage device interface.

Abstract: In a method for verifying a printed circuit board (PCB) layout using a computing device, a PCB simulation file is obtained from a storage device of the computing device, and a PCB image is displayed on a display device according to the PCB simulation file. The PCB image includes multiple signal lines and switching voltage regulator nodes (SVRN). A SVRN to be checked is selected from the PCB image, and all signal lines around the SVRN are searched. The method calculates a layout distance between the selected SVRN and each of the searched signal lines, and generates a graphical window interface to position a signal line whose layout distance is equal to or less than the minimum distance. The method further modifies the layout of the positioned signal line to satisfy a layout design specification by increasing the layout distance to the minimum distance.