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A reference designator unambiguously identifies the location of a component within an electrical schematic or on a printed circuit board.The reference designator usually consists of one or two letters followed by a number, e.g. C3, D1, R4, U15.
Diode schematic symbol vs cathode marking on the package. The 1N4148 is a standard silicon switching signal diode . It is one of the most popular and long-lived switching diodes because of its dependable specifications and low cost.
Fiducial marker for a chip to the left and the whole PCB beneath. In printed circuit board (PCB) manufacturing, fiducial marks, also known as circuit pattern recognition marks, allow SMT placement equipment to accurately locate and place parts on boards. These devices locate the circuit pattern by providing common measurable points.
Table tennis racket Also known as a paddle or bat, is used by table tennis players. The table tennis racket is usually made from laminated wood covered with rubber on one or two sides depending on the player's grip. The USA generally uses the term "paddle" while Europeans and Asians use the term "bat" and the official ITTF term is "racket". [17]
Their wires were led through holes to the underside or interior. The ends of lengths of wire or wire-ended components such as capacitors and resistors were pushed through the terminals, and usually looped and twisted. When all wires to be connected had been fitted to the terminal, they were soldered together (and to the terminal).
The light from white LED lamps and LED strip lights is usually provided by industry standard surface-mounted device LEDs (SMD LEDs). [2] Non-SMD types of LED lighting also exist, such as COB (chip on board) and MCOB (multi-COB). Surface-mounted device LED modules are described by the dimensions of the LED package. A single multicolor module may ...
Populated (rear) and unpopulated (front) TSOP land patterns on a printed circuit board. A row of through-holes acting as the footprint for a pin header.. A footprint or land pattern is the arrangement of pads (in surface-mount technology) [1] or through-holes (in through-hole technology) used to physically attach and electrically connect a component to a printed circuit board.
These cables use a Riser Card PCB and an edge connector on each side of the cable, with a copper alloy surrounded by a plastic insulator that allows for the further data transmission distances. [3] Such cables are now commonly used in modern household gaming PC's to allow for different positioning of PCI Express Cards and GPU cards in a ...