Sistemas de energia em telecomunicações

Orcad Tutorial
1. Introduction
Orcad is a suite of tools from Cadence for the design and layout of printed circuit boards (PCBs). We are currently using version 9.2 of the Orcad suite. This document will give you a crash course in designing an entire circuit board from start to finish. This will be a very small and simple circuit, but it will demonstrate the major concepts and introduce the tools behind completing a PCB design. After you have completed this tutorial, you will know all the steps needed to make PCBs using Orcad. The circuit you will design is shown in the figure below. It is a dual polarity adjustable power supply. A center tapped transformer, some diodes, 2 IC’s and few resistors and capacitors are included in the circuit.

Orcad really consists of two tools. Capture is used for design entry in schematic form. Layout is a tool for designing the physical layout of components and circuits on a PCB. During the design process, you will move back and forth between these two tools. WARNING : Save your work frequently while working on this tutorial. NOTE : It is recommended that you read this tutorial in 1024x768 display resolution.

2. Before You Begin
It is helpful to be very organized when you are designing. First thing is to have a separate folder for every project. If you have a folder called Projects on your drive, don’t put all your projects directly in that folder or you will create a mess that will waste your time in locating a particular file of a particular project. Instead you must have a new subfolder in it for your every project. Also Orcad will create many types of files for a single project and if you keep all of them in the same directory, it can quickly become very confusing. I like to make a directory hierarchy and put associated files into subdirectories. As you will progress working in Orcad you will realize the importance of this strategy. So ready for some action and create a folder called PowerSupply on a convenient