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Electronics
Code
Specifications
Quantity
DL
2
203C
COMBINATORY LOGIC

didactic equipment
The module can be arranged on a pair of supports for a better reading of the block diagrams and an easier use
of the connecting leads.
This module must show a schematic diagram and 2 mm terminals for the
electrical connection.
The case of the module must be made in metal material.
This board allows the study of the following combinatory circuits: adders, subtractors, multipliers, code
converters, multiplexers and demultiplexers. The board is composed of:
• 4 AND (2

input)
• 3 AND (3

input)
• 12 NAND (2

input)
• 4 NAND (4

input)
• 2 NAND TRIGGER (4

input)
• 4 OR (2

input)
• 2 OR (3

input)
• 1 OR (4

input)
• 4 NOR (2

input)
• 2 NOR (4

input)
• 4 EX

OR (2

input)
• 6 inverters
• 2 AOI (2 and 3 input)
• 12 sili
con diodes
• 8 resistances
• 1 dual

in

line 16

pin socket
Power supply: 5Vdc, 3W
Experiments:
LOGICAL NETWORKS AND TRUTH TABLES
Checking the operation of a NOT gate
Checking the property of dual complementation
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Checking the operation of a 2

inputs AND gat
e
Checking the operation of a 3

inputs AND gate
Checking the commutative property for AND operator
Checking the associative property for AND operator
Connecting a 4

inputs AND operator
Checking the operation of a 2

inputs OR gate
Checking the operation of
a 4

inputs OR gate
Checking the commutative property for OR operator
Checking the associative property of the OR operator
Checking of a 5

inputs OR operator
Checking the operation of AND and OR operators as control operators
in data transfer
Checking the o
peration of2

inputs EX

OR gate
Checking the commutative property for EX

OR operator
Checking the operation of EX

OR operator as controllable NOT operator
LOGICAL FUNCTIONS AND CANONICAL FORMS OF A FUNCTION
Functional checking of EX

OR canonical forms
Func
tional checking of the first canonical form for a function assigned through its t.t.
Functional checking of a logical circuit through comparison between the t.t. of its logical function
Checking a logical circuit through comparison with the t.t. of its log
ical function
Functional checking of a logical circuit through comparison with t. t. of its logical function
Functional checking of a logical circuit through comparison with t. t. of its logical function
THE BOOLEAN ALGEBRA THEOREMS AND THE TECHNIQUES TO
SIMPLIFY LOGICAL FUNCTIONS
Checking Boolean algebra theorems: single variable theorems
Checking the Boolean algebra theorems: theorems concerning a variable and a constant
Checking the Boolean algebra theorems: the absorption theorems
Checking the Boolean
algebra theorems: De Morgan's theorem
Functional checking of logical function minimization through the Karnaugh map
Functional checking of equivalent forms of logical function minimized through the Karnaugh map
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LOGICAL OPERATORS NAND AND NOR
Checking the
operation of the NAND logical operator (2

inputs NAND gate, 4

inputs NAND gate and 4 inputs
NAND gate with Schmitt trigger inputs)
Checking the properties of NAND operator
Checking the inapplicability of associative property for NAND operator
Checking the
operation of logical operator NOR (2

inputs NOR gate and 4

inputs NOR gate)
Checking the properties of NOR operator
Checking the inapplicability of associative property for NOR operator
Checking the operation of NAND and NOR operators as control operators
in data transfer
Functional checking of algebraic simplification of logical function realized with universal operators
ANALYSIS OF COMBINATIONAL LOGICAL NETWORKS
Lamp control from two points with switches
Lamp control from three points with switches
Autom
atic event selection
Event selection through diode matrix (Diode AND gate)
Automatic 4

inputs priority selector
Process control
Comparator for two binary circuits
Adders
Parallel 2

bits adder
Subtractors
Parallel 2

bits subtractor
Multiplier
Decimal

> BCD
8421 binary code converter
Decimal

> BCD 8421 binary code converter
Data selector or 4

to

1 line multiplexer
Data selector or 2

to

1 line multiplexer for 3

bits data
1

to

4 lines demultiplexer
Parity controller/generator
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