How each schematic symbol component is connected?
Physically, these parts are connected by wires and in the diagrams you will observe black lines moving from one part to the other. It means that these are connected with a wire and when the black lines cross in any diagram there are several ways of telling whether the wires should be connected to each other or not. Components connectivity and polarity is shown below.
What about Polarity, Which schematic component to connect where?
There are different type of component attached with circuit some are not polarized and some polarized, if the component is polarized that mean the one side of a component is positive (+ve ) and the other side of a component is negative (-ve). This means that connect that component in define way positive side with positive and negative side with negative. Polarity is included in the symbols by some symbols. One manufacturing issue discussed on a frequent basis is the component polarity. The purpose of this article is to describe the process for translating component arrangement information from the computer aided design (CAD) software to the physical part (component) pick ‘n place machine & to suggest ways in which the process might be refined and improved. I have received many complaints for backwards parts on assemblies & drawings that are not clear & the response from engineering has been to “use the data”. This solution is not insensitive, when software has been debugged appropriately, computers systems do not make mistakes & humans often do. In an ideal case, a sufficient and satisfactory set of CAD-generated data files will provide much information to mount components on a bare board correctly. In a theoretical way, a board has to be able to be assembled by means of computer-generated data alone, without polarity marks, without silkscreen and without the requirement for visual observation to a drawing. If the data provided by the CAD system is not authentic and genuine, although, the assembler is enforced to add manual processes using several types of drawings and visual inspection to ensure that the assembly is correct and accurate. Even automated optical inspection (AOI) equipment is not producing any or the desired effect if it has not been laden with authentic and genuine data. Attempts to solve problems caused by CAD-generated data files are time consuming & error causing; that’s why, scanning and studying ways to refine improve accuracy and usefulness is in our best interest. First, a to observe the polarity of the physical part a general rule of thumb is to look for which metal lead wire on the part is longer. This is the + side.
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Tutorial 1: Pre-requisites to draw schematic diagram
Tutorial 2: Components connectivity and polarity
Tutorial 3: Drawing Schematic symbol
Tutorial 4: Optimizing your circuit schematic diagram
