Difference between revisions of "CircuitJS/C3/NOR-Gate/English"

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Revision as of 16:00, 14 February 2024

Visual Cue Narration
slide:1 Welcome to the spoken tutorial on NOR Gate using CircuitJS simulator
Slide 2:

Learning Objective

In this tutorial, we will learn about
  • NOR Gate and
  • Verify its truth table
Slide 3:

Prerequisite

To follow this tutorial, you should have a basic knowledge of,
  • Electrical circuits
Slide 4:

System Requirement

To record this tutorial, I am using:
  • Ubuntu Linux 20.04 OS
  • CircuitJS Application
Slide 5:
NOR Gate
  • NOR is an abbreviation for “NOT OR”
  • Its truth table is exactly opposite of the OR gate.
  • When all the inputs are LOW, NOR gate output is HIGH, otherwise it is LOW.
NOR Gate.png
 It is the combination of two basic logic gates, the OR gate and the NOT gate connected in series.

We will make this circuit for the NOR Gate demonstration.

Show the diagram
 To do this experiment, we will need
  • 1 OR Gate
  • 1 NOT Gate
  • 2 Logic Inputs
  • 1 Logic Output
Let us open the CircuitJS interface

Click on File in the menu bar and select New Blank Circuit

Click on the Draw option Browse through the menu

Select OR Gate

Click on the Draw menu and select Logic Gates, Input and Output.

Then select Add OR Gate.

Drag and draw the OR gate in the working area.

We need two inputs and one output to see the result of the NOR Gate.
Select Logic Input Go to the Draw menu and select the Logic Gates, Input and Output.

Select Add Logic Input and draw the logic input as shown.

Right click on the logic input and select the Edit option.

In the pop-up window, check the Numeric box and click on the OK button to save the changes.

By doing this, the input values will be shown in either 0’s or 1’s.

We need two logic inputs to build the NOR gate.

Right click on the logic input component and select the Duplicate option.

Connect both the logic input to the OR Gate as shown.

Select Add Inverter We require a NOT gate to get the desired output of NOR Gate.

Click on Draw and go to Logic Gates, Input and Output and select Add Inverter option.

The NOT gate is named as Inverter in CircuitJS.

Drag and draw the NOT gate in the working area.

Connect the output of the OR gate to the input of the NOT gate.

Select Logic output Now we need a logic output to see the result.

Click on Draw and go to Logic Gates, Input and Output.

Select Add Logic output component from the list.

Drag and draw the Logic output component.

Right click on the Logic output component and select Edit option.

In the pop-up window, check the Numeric box and click on the OK button to save the changes.

By doing this, the output values will be shown in either 0’s or 1’s.

Connect the logic output to the output pin of NOT gate.

Use Add text option to give labels Use the Add text option to give names to the inputs and output pins.

Let us label the inputs as A and B, and output as Y.

NOR Gate Truthtable.png This is the truth table for the NOR Gate, where A and B are the inputs and Y is the output.

The NOR gate output is 1, only when both the inputs are 0.

Let us go to the CircuitJS simulator to verify the truth table of the NOR gate.
Working of the circuit For the first condition in the truth table, both inputs A and B are 0, i.e. they are LOW.

By default, the values of both the inputs is 0.

Notice that the output Y in the circuit is showing value 1, i.e. the output Y is HIGH.

Thus the first condition is verified.

To verify the second condition in the truth table, we need to change the value of input B.

To change the value of the input from 0 to 1 or vice-versa, click on the input value.

Click on the input B value, and notice the input value changes from 0 to 1.

The result at the output Y changes, i.e. the output Y shows 0 value.

The second condition from the truth table is verified.

Check the remaining two input conditions of the NOR gate with the truth table.

Symbol_NOR Gate.png NOR gate is represented with this symbol.

Note the small circle added in the OR gate which represents the NOR gate.

In CircuitJS, a NOR gate component is available.

Let us see how to use it.

Go to Draw, then select Logic Gates, Input and Output, and then select the Add NOR gate option.

Drag and draw the gate in the work area.

Slide:

Assignment 1

NOR GATE component

As an assignment,
  1. Connect the logic input and logic output to the NOR gate.
  2. Use Add Logic Input and Add Logic Output to connect input and output of the NOR gate.
  3. Label the input pins as A and B and output pin as Y
  4. Follow the truth table input values and verify the NOR Gate.
Slide :

Assignment 2

3-INPUT NOR Gate.png

3-INPUT NOR Gate Truthtable.png

Do this assignment with 3-input gate:
  • Build a 3-input NOR gate as shown in the image.
  • Label the input pins as A,B and C and output pin as Y
  • Verify the truth table for the 3-input NOR gate.
This brings us to the end of this tutorial. Let us summarize.
Slide

Summary

In this tutorial, we learnt about
  • NOR Gate and
  • Verify its truth table
Slide :

About Spoken Tutorial project

The video at the following link summarizes the Spoken Tutorial project.

Please download and watch it.

Slide :Spoken Tutorial workshops The Spoken Tutorial Project Team conducts workshops and gives certificates.

For more details, please write to us.

Slide : Forum for specific questions Please post your timed queries in this forum.
Acknowledgement Spoken Tutorial project was established by the Ministry of Education(MoE), Govt of India
Thank you This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay.

Thanks for watching.

Contributors and Content Editors

Madhurig, Nirmala Venkat

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