Quick 7805 voltage regulator demonstration

Table of Contents

7800 series integrated circuits (ICs) are 3 terminal device that outputs a certain voltage (5V for the 7805) as long as the input voltage is at least about 2V higher than the output voltage. The 78 indicates that it is for a positive supply in relationship to ground. The following 2 digits indicate the amount of voltage that it outputs. There is also a 79xx series that are used with voltages that are negative in relationship to ground.

Diagram

Simple 78xx 7805 fixed voltage regulator component schematic diagram drawn by electronzap electronzapdotcom
Simple 78xx 7805 fixed voltage regulator component schematic diagram drawn by electronzap electronzapdotcom

All limitations of components should be checked with the datasheet. Here’s a handful of important ones, and is not guaranteed to be accurate.

  • Max supply voltage: 35V
  • Max current: 1.5A. Would need a good heat sink
  • Internal power dissipation: Internally limited (reduces output current as needed to prevent overheating.

Video

Quick 7805 78xx voltage regulator integrated circuit IC demonstration by electronzap

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  • Information on this site is not guaranteed to be accurate. Always consult the manufacturer info/datasheet of parts you use. Research the proper safety precautions for everything you do.

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