List of lab experiments of Digital electronics of first Sem Diploma- EC

Department of Technical EducationDiploma Programme in Electronics and Communication Engineering/ Electronic Instrumentation & Control Engineering  1st SEMISTER
SUBJECT : DIGITAL ELECTRONICS LAB
Common to E&C, EI&C, CS&E and IS&E
Lab Experiments :
A1 Familiarization of Digital trainer kit, IC tester, Logic pulser, logic probe
2Study of IC Manual and familiarization of Ics and IC familiesB1Familiarization of logic gates using Ics
a) 7400      b) 7402      c) 7404   d) 7408    e) 7432  f)  7486
2  Realization of NOT, OR, AND, NOR, EX-OR and EX-NOR gates using NAND gate
3  Realization of NOT, OR, AND, NOR, EX-OR and EX-NOR gates using NOR gate
4  Implementing and verifying Boolean Expression using K-map
5  Verification of DeMorgan's theorem and realization of the given expression using Demorgan's law
6  Implementing Half Adder and Full Adder using logic gates
7  Implementing Half Subtractor and Full Subtractor using logic gates
8  Verification of truth table of Flip-Flop
i )  Clocked RS FF using NAND Gates
ii)  JK FF Using IC 7476
iii)  T and  D FF using  IC 7476.
9     Realize Binary to Gray code converter using IC 7486
10   Realize Gray to Binary code converter using IC 7486
11   Realize parity generator and checker using IC 7486
12   Familiarization of IC 7483 with 4bit  addition
13   Realize 2-bit comparator using logic gates and familiarization of IC 7485
14   Interface  7 segment display with IC 7447 / 7448 decoder .
15   Verify the truth table of 1:8 Demultiplexer  and 8:1 multiplexer using IC 74138 and 74151respectively
16   Verify the truth table of priority encoder using IC 74147
17   Realize and verify the truth table of 4:1 Multiplexer using 2:1 Multiplexer
18   Verify the truth table of Shift Reigister 7495 ( SISO, SIPO, PISO, PIPO)
19   Veirfy the truth table of a) up-down counter using IC- 74193 b) Decade counter using IC-7490REFERENCES :
DIGITAL ELECTRONICS PRACTICE WITH INTEGRATED CIRCUITS
R.P.JAIN AND MMS ANAND
SCHEME OF VALUATION
Note: Pin diagrams of IC's shall be  provided to the students .
1   Record
2   Write up any Two Experiments (Circuit Diagram,Truth Table Expression)
3   Conduction any one Experiment
4   Result
5   Viva-Voce

Model question paper of DIGITAL ELECTRONICS of Diploma 1st Sem - E C

            MODEL QUESTION PAPER          
        FIRST SEMESTER          
           SUBJECT :  DIGITAL ELECTRONICS-1          
        Common to E&C ,EI&C,CS&E and IS&E.           
        SUBJECT: DIGITAL ELECTRONICS-I          
        TIME :3 HRS                                                                         MAX.MARKS :100          

                  
        Note:  1)Section A is  compulsory.          
                  2) Answer any two main questions from each of the remaining Sections          
                  

        SECTION:  A          

                  
1    a.    Fill in the blanks with suitable words                                    5X1      
    (i)    The radix of hexadecimal number system is _______________          
    (ii)    The number of flip-flops required for decade counter is ______________          
    (iii)    Race around condition is eleminated in ________________ flip flop          
    (iv)    An example for unsaturated logic _________ Ics          
    (v)    The SISO shift register with feed back _________ counter          
                  
    b.    Write a note interfacing between TTL and CMOS Ics                         5      
                  

        SECTION:  B          

                  
2    a.    Define the radix of a number system    2      
    b.    Convert the following from Binary to Decimal number system    8      
         (i) 11001001 (ii) 1110.1111          
        (iii) 11001111 -->( )h   (iv) 1AF--> ( ) D          
    c.    Subtract the following using 2's complemnet method          
        (i) 1FE2- 0AC2            (ii) 412.6 - 255.0    5      
                  
3    a.    Convert the following gray code to binary code (i) 110101 (ii) 111110     2      
    b.    Convert the following Excess-3 code to binary code (i) 11011 (ii) 10110   3      
    c.    Differentiate analog and digital signals                                                          5      
    d.     Expalin AND logic with symbol,  logic expression and truth table, .             5      
                  
4    a.    Define Noise Margin and power dissipation with reference to logic families  4      
    b.    State Associative and Distributive laws of Boolean Algebra                       4      
    c.    Simplfy the following expressions and realize the same using gates          
        (i) A+(BC.(D+E)+ B))     (ii) (A+B).(C+D).(AB+CD)                     7      
                  
                  

        SECTION: C          

                  
5    a.    What is a Full adder? Use K- map to derive logic expressions for its output    7      
    b .   Compare serial and parallel adders                                 3      
    c .   Explain the operation of 4-bit parallel adder                      5      
                  
6    a .   What is a priority encoder?                                 2      
    b.    Write the logic circuit and truth table of Decimal to BCD encoder   8      
    c.    Write the logic circuit and truth table of BCD to seven segment decoder for common
         anode display                                                            5                     
7    a.    What is a multiplexer?                                          2      
    b    Explain the 8:1 multiplexer with the help truth table and logic circuit      6      
    c .   What is the use of De-multiplexer? Write the truth table and logic circuit of
           4:1 De-multiplexer                                                     7      
                  

        SECTION: D          

                  
8    a.     Differentiate between combinational and seqential circuits         3      
    b .   Explain the operation of clocked RS-FF using NAND gates         6      
    c.    What is meant by Race around condition? How it is overcome?    7      
                  
9    a .   Explain the logic diagram, truth table and timing diagram,
       the operation of 4-bit ripple counter                              8      
    b.    What do you by modulus of counter?                         2      
    c .   Explain how decoding gates can be used for construction of mod-11 counter   5      
                  
10    a .   Explain with logic diagram, truth table and timing diagram,
              the operation of a 4-bit shift counter  8    
    b.    Write the logic diagram of a 4-bit shift register.
           Write the truth table and timing diagram for a 4-bit SISO register for a data of 1011  ( 7 )