Download Voltage regulator

VOLTAGE REGULATOR LAB
OBJECTIVE
In this lab we will be designing a circuit that takes an input voltage of an arbitrary value, and outputs 5 volts. There
are many ways to achieve this, such as using a voltage divider. However, a voltage divider can limit the current
from input to output. A practical way to lessen this effect is to use a semiconductor device called a voltage
regulator. A voltage regulator can be fixed or, as we will see in this lab, adjustable. For the adjustable regulator, by
choosing a specific set of resisters we can control what the output voltage will be.
ASSIGNMENT 1
Use the following video as a guide to simulate the LM317 voltage regulator.
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Video: https://vimeo.com/56560278
aHere are the specifications:
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Device: LM317AH
Input: 12V
Desired output 5V
Input: 12V
Output: 5V
LM317
Voltage Regulator
ASSIGNMENT 2
Now that we are acquainted with Multisim and how to simulate regulators, let’s simulate a fixed voltage regulator.
Here are the specifications:
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Device: LM7805CT
Input: 12V
Desired output: 5V
ASSIGNMENT 3
1.
2.
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In Multisim, navigate to Place  Component
In the Database dropdown, make sure “Master Database” is selected. Also, in the Group dropdown, make
sure “Basic is selected.
In the Family field, there is a device called a “POTENTIOMETER.” Use this device along with the circuit in
Assignment 1 to create a voltage regulator with the following specifications:
 Device: LM317AH
 Input: 12V
 Desired output: 0 – 5V (adjustable from 0V to 5V by adjusting the potentiometer)