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Design of DC regulated power supply based on Protel

2013-06-18
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Design of DC regulated power supply based on Protel 1 Design of DC regulated power supply 1.1 Principle block diagram The working principle of DC regulated power supply is that 220V AC is stepped down by transformer, and then rectified into pulsating DC by bridge rectifier circuit composed of four diodes. After series voltage stabilization circuit and current limiting overload protection link, 3V or 6V DC voltage output is selected under the action of single-pole double-throw switch. Its block diagram is shown in Figure 1.1 1.2 Reference circuit diagram 1.2 Reference circuit of DC regulated power supply 2 Draw schematic diagram with protel software 2.1 Create a new design Use menu File/New to create a new design, name it, select the file path, and then enter the standard interface of Protel99SE (Figure 2.1.1). Enter the Documents directory and use File/New command, the system pops up a dialog box of file type. We select SCH icon to enter SCH design system, and the system interface changes to SCH design interface. (Figure 2.1.2) Figure 2.1.1 Create a new design Figure 2.1.2 SCH design interface 2.2 Importing component libraries We found that there is an additional Browse SCH tab on the left. Click it to enter the schematic manager. Libraries refers to the component libraries used. Generally speaking, the default component library Miscellaneous Devices.lib can meet the needs. If you need to use other component libraries,

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