Abstract:
A motherboard includes a chipset, a first connector pad suitable for receiving a first type of PCI connector, a second connector pad suitable for receiving a second type of PCI connector, a plurality of first transmission lines, a plurality of second transmission lines, and a plurality of areas for mounting switches. One end of each first transmission line is connected to the chipset, another end of each first transmission line is connected to an end of a corresponding area, one end of each second transmission line is connected to another end of the corresponding area, another end of each second transmission line is connected to the second connector pad, the first connector pad is connected to the plurality of first transmission lines, and the switches are selectively mounted on the plurality of areas.
Abstract:
A printed circuit board having only one circuit element, said circuit element having one or more leads and each lead being in electrical communication to one end of a trace on the printed circuit board, wherein said trace has a second end terminating at a pad, wherein said pad is in electrical communication with a receptacle capable of receiving and retaining a wire. A printed circuit board selected from the group consisting of a printed circuit board having only two traces, a printed circuit board having only three traces, a printed circuit board having only four traces, a printed circuit board having only six traces, a printed circuit board having only eight traces, a printed circuit board having only ten traces, a printed circuit board having only twelve traces, a printed circuit board having only fourteen traces and a printed circuit board having only sixteen traces, wherein each trace has two ends, one end being a receptacle pad connected to a receptacle capable of receiving and retaining a wire, and the second end of said trace being a lead-pad electrically connected to a lead-receptacle, wherein said lead-receptacle is capable of receiving and retaining a lead or pin from a circuit element.
Abstract:
A parallel wire is installed on a board. Wire parts of strip-off margins at both ends of the parallel wire are bent so as to form bent portions before the wire parts are inserted into the board. The wire parts inserted into the board are prevented from being removed from the board by the bent portions and soldered to the board, while being moved in a dip bath. The bent portions are respectively formed into substantially U-shapes so that the substantially U-shaped bent portions are oriented opposite each other in a case where the parallel wire is in a flat state before the wire parts are inserted into the board and the substantially U-shaped bent portions are oriented in the same direction after the wire parts are inserted into the board, whereby solder uniformly accumulates on the wire parts to fix the wire parts to the board when the wire parts inserted into the board are moved in the dip bath in said direction.
Abstract:
The invention relates to an electrical connector housing having a first casing, a second casing and a sidewall, and including a first printed circuit board and a second printed circuit board superposed with a given space. The first printed circuit board includes at least a first conductor and the second printed circuit board includes at least a second conductor. The electrical connector housing further includes a connector-receiving portion projecting from the sidewall and placed at a position between the first and second printed circuit boards. The first conductor on the first printed circuit board is connected to a first terminal device, while the second conductor on the second printed circuit board is connected to a second terminal device, and the first and second terminal devices protrude at the connector-receiving portion, so that they are adapted to connect to a terminal of an outside connector to be inserted into the connector-receiving portion.
Abstract:
A method of soldering comprises disposing first and second balls of solder adjacent one another on a wire; disposing flux on the wire between and in contact with both of the first and second balls and so as to substantially fill a space between the first and second balls; disposing the wire on a substrate so that the first and second balls of solder contact a single conductor on the substrate; and melting the first and second balls of solder and flux and soldering the wire to the conductor.
Abstract:
The invention relates to a terminal piece for making connections between a first conductor element and a second conductor element superposed with a given distance. The terminal piece is formed by stamping out a substantially U-shaped piece from a conductive metal sheet and includes a first leg portion with a first contact section, a shoulder portion and a second leg portion with a second contact section, the first leg portion being longer than the second leg portion. The first conductor element includes a terminal path hole and a terminal-fixing hole. The first leg portion is passed through the terminal path hole and the first contact section is connected to the second conductor element by a first fixing device, and the second contact section is connected to the first conductor element by a second fixing device.
Abstract:
The invention relates to an electrically conductive wire (1) comprising two spaced solder balls (2) thereon and flux (4) in the space (3) between the solder balls for making a circuit connection between electrically conductive members on opposite surfaces of a substrate. The wire (1) is inserted in a through-hole of the substrate and soldered by a customary soldering process, like wave soldering.
Abstract:
The present invention relates to a device and a method at a printed board for obtaining good transmission qualities in transmission conductors on a predetermined area (10) of the printed board (11). A separate component (1) for signal transmission comprises a conductor (5). The component (1) is mounted, with the conductor facing the printed board (11), over the area (10) of the printd board, which requires good transmissions qualities, whereby an air gap (L) is obtained between the conductor (5) and the printed board (11). Soldering joints (21) connect each one of the outer parts (7a, 7b) of the conductor (5) of the component (1) to corresponding pattern conductors (17a, 17b) on the printed board (11). The thickness of the soldering connections and the thickness of the pattern conductors form the air gap (L) be the conductor (5) and the printed board (11). In an alternative embodiment according to the invention, a groove (23) is milled out of the printed board (11) under the conductor (5), obtaining an enlarged air gap between the conductor (5) and the printed board (1).
Abstract:
A bypass piece is formed at a forward end of a extension part. Three bypass Cu wiring patterns, which cannot be formed at a extension part, are formed at the bypass piece. The bypass piece is bent from the forward end of the extension part towards the main body so as to overlap the extension part. Connecting portions of the bypass Cu wiring patterns of the bypass piece are soldered to end portions of wiring patterns of the main body.
Abstract:
In an electronic circuit arrangement mounted on a printed circuit board in which leadless circuit parts are attached to the printed circuit board with adhesive. A white paint is applied onto a region to which adhesive is applied, and an adhesive containing pigment contrastable to the white paint is applied onto the paint.