RAM on a computer

RAM (pronounced ramm) is an acronym for random access memory, a type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes. RAM is the most common type of memory found in computers and other devices, such as printers.

Laptop

A laptop, often called a notebook, or notebook computer, is a portable personal computer with a "clamshell" form factor, with a keyboard on the lower part of the "clamshell" and a thin LCD/LED computer screen on the upper portion, which is opened up to use the computer. Laptops are folded shut for transportation, and thus are suitable for mobile use. Although originally there was a distinction between laptops and notebooks, the former being bigger and heavier than the latter, as of 2014, there is often no longer any difference. Laptops are commonly used in a variety of settings, such as at work, in education, and for personal multimedia and home computer use.

Desktop computer

A desktop computer is a personal computer designed for regular use at a single location on or near a desk or table due to its size and power requirements. The most common configuration has a case that houses the power supply, motherboard (a printed circuit board with a microprocessor as the central processing unit, memory, bus, and other electronic component's), disk storage (usually one or more hard disk drives, optical disc drives, and in early models floppy disk drives); a keyboard and mouse for input; and computer monitor and printer for output. The case may be oriented horizontally and placed atop a desk or vertically and placed underneath or beside a desk.

Motherboard

A motherboard is the main printed circuit board (PCB) found in general purpose microcomputers and other expandable systems. It holds and allows communication between many of the crucial electronic components of a system, such as the central processing unit (CPU) and memory, and provides connectors for other peripherals. Unlike a backplane, a motherboard usually contains significant sub-systems such as the central processor, the chipset's input/output and memory controllers, interface connectors, and other components integrated for general purpose use.

Motherboard

Motherboard specifically refers to a PCB with expansion capability and as the name suggests, this board is often referred to as the "mother" of all components attached to it, which often include peripherals, interface cards, and daughtercards: sound cards, video cards, network cards, hard drives, or other forms of persistent storage; TV tuner cards, cards providing extra USB or FireWire slots and a variety of other custom components.

Programming Contest

Programming Contest at Green University in Bangladesh.

Prize giving for Programming Contest

Programming Contest at Green University of Bangladesh.

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Sunday, December 4, 2016

Circular Queue in Data Structure

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Sunday, November 27, 2016

Fundamentals of Electric Circuits textBook

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Saturday, November 26, 2016

EXAM C CONSTRUCTION AND EVALUATION OF ACTUARIAL MODELS EXAM C SAMPLE SOLUTIONS

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EXAM C   CONSTRUCTION AND EVALUATION OF ACTUARIAL MODELS EXAM C SAMPLE SOLUTIONS   Click Here
EXAM C   CONSTRUCTION AND EVALUATION OF ACTUARIAL MODELS

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ELECTRONIC DEVICES AND CIRCUIT THEORY Books

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ELECTRONIC DEVICES AND CIRCUIT THEORY BY ROBERT BOYLESTAD LOUIS NASHELSKY


  1. ELECTRONIC DEVICES AND CIRCUIT THEORY BY ROBERT BOYLESTAD LOUIS NASHELSKY Click Here
  2. PN Junction Diode and biasing Click Here


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Friday, November 25, 2016

CHARACTERISTICS OF ZENER DIODE Lab - 02

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Green University of Bangladesh
 Faculty of Science and Engineering 
Department of Electrical and Electronic Engineering 
Program: B.Sc. Engg. in EEE Course Title: EEE 202   
 Electronics Lab Course Credit: 1.5 
Laboratory Experiment Sheet
 Course Teacher: Md. Atiqul Islam 

EXPERIMENT NO: 02 

NAME OF THE EXPERIMENT: CHARACTERISTICS OF ZENER DIODE 

AIM:   1. To Obtain the Forward Bias and Reverse Bias characteristics of a Zener diode. 2. Find out the Zener Break down Voltage from the Characteristics. 

APPARATUS: 1. DC REGULATED POWER SUPPLY – (each group 1) 2. ZENER DIODE – (one piece) 3. RESISTOR  1K – (one piece) 4. D.C AMMETERS – (each group 1) 5. D.C VOLT METERS – (each group 1)    6. BREAD BOARD AND CONNECTING WIRES  -  1 SET 

Bias Characteristics


Prepared By:  Md. Atiqul Islam, Lecturer, EEE  2

I-V characteristic of Zener Diode


PROCEDURE: 

FORWARD BIAS CHARACTERISTICS: 

1. Connect the Circuit as per the Circuit Diagram on the bread board. 2. Switch on the Regulated Power Supply and slowly increase the source voltage.  3. Increase the Diode Current in steps of 2mA and note down the corresponding voltage across the Zener Diode under forward Bias condition as per table given below. 4. Take the readings until the Diode Current of 30mA. 5. Plot the graph VF versus IF on the graph Sheet in the 1st quadrant as in Fig.

REVERSE BIAS CHARACTERISTICS:

1. Connect the Circuit as per the Circuit Diagram on the bread board.  2. Switch on the Regulated Power Supply and slowly increase the source voltage.  3. Increase the Diode Current in steps of 2mA and note down the corresponding voltage across the Zener Diode under forward Bias condition as per table given below. 4. Take readings until the Diode Current is 20 mA. 5. Plot the graph VR versus IR on the graph Sheet in the 3rd quadrant of the diode. 6. Observe and note down the break down Voltage of the diode.

TABULAR FORMS:

Forward and Bias Table




ZENER BREAKDOWN VOLTAGE:  Draw a tangent on the reverse Bias Characteristic of the Zener Diode starting from the Knee and touching most of the points of the curve. The point where the tangent intersects the X-axis is the Zener Breakdown Voltage.

RESULT:    The Characteristics of the Forward and Reverse biased Zener Diode and the Zener Break Down Voltage from the Characteristics are Observed.

  Zener Breakdown Voltage =   Volts.

QUESTIONS TO BE ANSWERED:

1. What is meant by Zener break down? 2. What are the different types of break downs?  3. What is the difference between Avalanche Zener break down? 4. What are the applications of Zener diode? 5. What is the difference between normal PN Junction diode and Zener diode?

Prepared By:  Md. Atiqul Islam, Lecturer, EEE  3 

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Study of an Emitter follower Lab 07

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Green University of Bangladesh 
Faculty of Science and Engineering 
Department of Electrical and Electronic Engineering
Program: B.S.c Engg. in EEE
Course Title: EEE 314 Electronics Lab
Course Credit : 1.5, Prerequisite  EEE 201, EEE 209
Laboratory Experiment Sheet
Course Teacher: Md. Najmussadat, Lecturer
Experiment No.: 07

Experiment Name:  Study of an Emitter follower Lab


01 Study of an Emitter follower Lab 07

02 Study of an Emitter follower Lab 07

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MATHEMATICAL OPERATIONS USING OP-AMP Lab 06

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Green University of Bangladesh
Faculty of Science and Engineering
Department of Electrical and Electronic Engineering
Program: B.Sc. Engg. in EEE
Course Title: EEE 2210 Electronics Lab
Course Credit: 1.5, Prerequisite: EEE 2105, EEE 2209

Experiment No: 09

NAME OF THE EXPERIMENT:  Mathematical OPERATIONS USING OP-AMP


Objective
Any kind of mathematical operations can be done using OP-AMP. In this experiment only three i.e. addition, differentiation and integration operations will be performed.

Theory
The property of infinite impedance and infinite gain of an operational amplifier results in a situation of zero voltage between the two input terminals. The effect is known as a virtual ground. Due to this effect, the op-amp can be used to perform some mathematical operations.
      Addition:   Using the concept of inverting amplifier, the op-amp can be used as an adder     (actually inverting adder) to sum up some input signals. In Fig.1 the output of the op-amp is
V0 = - (E1 + E2 + E3 )


 
 Adder circuit


                                                                                                             
Integration and Differentiation:  The circuit in Fig. 2 acts as an integrator where the output
 voltage is given as:

Integrator circuit





     Similarly, the circuit in Fig. 3 acts as a differentiator and the output voltage is given as:
 


Different circuit

                          
Apparatus
Trainer board                  1 Capacitor 10mF
OP-AMP (741)               1 Oscilloscope
Resistance                      50kW, 10kW, 20kW

Procedure
1.      Implement the adder circuit as shown in Fig.1. Apply the supply voltages as +12V and        -12V at pin no. 7 and 4 respectively. Apply the input voltages E1= 2V, E2= 3V and E3= 4V, and measure the output voltage.
2.      Implement the integrator circuit as in Fig. 2.
3.      Apply a sinusoidal waveform of 5 volt p-p in the input. Observe the output.
4.      Change the resistance to 50kW and observe the output voltage wave shape.
5.      Repeat step 3 and 4 for a square wave input signal.
6.      Repeat step 3 and 4 for a saw-tooth input signal.
7.      Implement the differentiator circuit in Fig. 3.
8.      Repeat steps 3 to 6.

Report
1.      Draw the input and output waveforms of the integrator and differentiator circuit.
2.      Design a circuit which will take two inputs v1(t) and v2(t); producing an output of v0(t) = 0.5v1(t) +20óv2(t)dt.



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Study of N-P-N CE and CB Transistor Lab 05

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Green University of Bangladesh 
Faculty of Science and Engineering 
Department of Electrical and Electronic Engineering
Program: B.S.c Engg. in EEE
Course Title: EEE 314 Electronics Lab
Course Credit : 1.5, Prerequisite  EEE 201, EEE 209
Laboratory Experiment Sheet
Course Teacher: Md. Najmussadat, Lecturer
Experiment No.: 04
Experiment Name: Study of N-P-N CE and CB Transistor

1  npn junction Lab 05

2  common base Lab 05

3 common emitter Lab 05

CE AND BE npn report Lab 05

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Study of BJT Biasing Circuits Lab 04

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Green University of Bangladesh 
Faculty of Science and Engineering 
Department of Electrical and Electronic Engineering
Program: B.S.c Engg. in EEE
Course Title: EEE 314 Electronics Lab
Course Credit : 1.5, Prerequisite  EEE 201, EEE 209
Laboratory Experiment Sheet
Course Teacher: Md. Najmussadat, Lecturer
Experiment No.: 04

Experiment Name: Study of BJT Biasing Circuits. 



1 bjt fixed bias circuit Lab 04

2 bjt self bias circuit Lab 04

2 clampers Lab 04

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Study of Diode Rectifier Circuits

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Green University of Bangladesh 
Faculty of Science and Engineering 
Department of Electrical and Electronic Engineering
Program: B.S.c Engg. in EEE
Course Title: EEE 314 Electronics Lab
Course Credit : 1.5, Prerequisite  EEE 201, EEE 209
Laboratory Experiment Sheet
Course Teacher: Md. Najmussadat, Lecturer
Experiment No.: 02

Experiment Name: Study of Diode Rectifier Circuits 


01 STUDY OF DIODE RECTIFIER CIRCUITS Lab 03

02 diode rectifier full wave rectifier Lab 03

03 Zener diode procedure Lab 03

04 CLAMPING circuit report Lab 03

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Mathematical operations using OP-AMP Lab 04

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Green University of Bangladesh
Computer Science & Engineering
Course Name: Digital Electronics & Pulse Techniques Lab
Course Code: CSE-204
Experiment No: 04
Experiment Name: Mathematical Operations using OP-AMP

00 Mathematical operations using OP-AMP Lab 04

01 Mathematical operations using OP-AMP Lab 04

02 Mathematical operations using OP-AMP Lab 04

03 Mathematical operations using OP-AMP Lab 04

04 Mathematical operations using OP-AMP Lab 04

05 Mathematical operations using OP-AMP Lab 04

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Inverting & Non-Inverting Amplifier Lab 03

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Green University of Bangladesh
Computer Science & Engineering
Course Name: Digital Electronics & Pulse Techniques Lab
Course Code: CSE-204
Experiment No: 03
Experiment Name: Inverting & Non-Inverting Amplifier Lab
00 Inverting & Non-Inverting Amplifier Lab 03

01  Inverting & Non-Inverting Amplifier Lab 03

02  Inverting & Non-Inverting Amplifier Lab 03

03  Inverting & Non-Inverting Amplifier Lab 03

04  Inverting & Non-Inverting Amplifier Lab 03

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Thursday, November 24, 2016

Operational Amplifier Lab o2

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 Green University of Bangladesh
Computer Science & Engineering
Course Name: Digital Electronics & Pulse Techniques Lab
Course Code: CSE-204
Experiment no: 02
Experiment Name: Operational Amplifier
00 Operational Amplifier Lab o2

01 Operational Amplifier Lab o2

02 Operational Amplifier Lab o2
03 Operational Amplifier Lab o2

04 Operational Amplifier Lab o2

05 Operational Amplifier Lab o2

06 Operational Amplifier Lab o2

07 Operational Amplifier Lab o2

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