# Digital Electronics

### DIGITAL LOGIC FUNDAMENTALS 1

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the fundamentals of digital logic, the theorems of Boolean algebra, the logic functions, the karnaugh’s maps, the logic gates NOT‐AND‐OR‐ NAND‐NOR, the flip‐flops and the logic families TTL and CMOS
THEORETICAL TOPICS
• Ideas of logic: logic connectives and fundamental theorems of the Boolean algebra
• Binary system
• Logic functions
• Algebraic description of the logic networks and the truth tables
• Theorems of the Boolean algebra
• Minimization techniques of logic functions through theorem applications and Karnaugh maps
• Logic gates and truth tables
• Fundamental logic operators
• NOT, AND, OR logic operators
• Operation of the AND and OR operators as control devices in the transfer of logic signals
• OR‐EXCLUSIVE logic operator
• Canonical forms of a function
• Graphic representation of functions
• AND ‐ OR ‐ NOT function
• NAND and NOR logic operators
• Operation of the NAND and NOR operators as control devices in the transfer of logic signals and carrying out of logic functions
• Generalities and definition of flip‐flop
• S ‐ R flip‐flop, with NOR and NAND operators
• J ‐ K flip‐flop
• Master‐slave J ‐ K flip‐flop
• T and D flip‐flops
• Fundamental logic families
• TTL and CMOS families
• Characteristic parameters of the logic gates
• Interfacing of the logic families, outputs and types of TTL circuits
• Interfacing from CMOS to TTL
• Interfacing from TTL to CMOS
• TTL with totem‐pole outputs • The open‐collector gates
• Wired‐and function Page
• Types of TTL circuits
• Schotty and low power Schotty of advanced type (AS/ALS)
• Interfacing with the bus
• An example of transmitter / receiver for bi‐ directional bus
•   Fault simulation
CIRCUIT BLOCKS
• AND / NAND
• OR / NOR
• XOR / XNOR
• Open Collector
• SET / RESET  Flip‐Flop
• D‐Type Flip‐Flop
• JK Flip‐Flop
• Tri‐State Output
• TTL / CMOS  Comparison
• Data Bus Control
In addition, the Circuit Board contains:
• +5 V regulated supply
• Built‐in clock circuit
•   Manual input signal control
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155E20

### DIGITAL LOGIC FUNDAMENTALS 2

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the characteristics of a combinatory logic network using devices such as encoders and decoders, multiplexer and demultiplexers, D/A and A/D converters, parity controllers, BCD/DEC converters, counters, comparators, shift registers and adders.
THEORETICAL TOPICS
• Definition and characteristics of a combinatory logic network
• The BCD code
• DEC/BCD and BCD/DEC code converters
• Encoders
• Decoders
• Multiplexer
• Demultiplexer
• Parity
• Parity logic circuits
• Nine bit 74180 parity generator/detector
• Unipolar codes
• Bipolar codes
• A/D converters
• Staircase A/D converter
• ADC converter of parallel or flash type
• ADC converter with simple slope
• ADC converter with double slope
• D/A converters (DAC)
• D/A converter with weighed resistances
• D/A converter with R–2R network
• 4 bit asynchronous binary counter
• 4 bit synchronous binary counter
• Asynchronous decimal counter
• Synchronous decimal counter
• Up/down synchronous counters
• Quantity comparators
• Four‐bit comparator
• Definition and classification of shift registers
• Operation principle
• 4 bit bi‐directional shift registers
• Applications
• Fault simulation
CIRCUIT BLOCKS
• BCD Decimal Decoder / BCD Priority Encoder
• Multiplexer / Demultiplexer
• 7‐Segment Driver / Display
• Parity Generator / Checker
In addition, the Circuit Board includes the following:
• +5 V regulated supply
• Built‐in clock circuit
• Built‐in pulse generator circuit
• Built‐in counter circuitry
• The 74LS42 decoder and LS147 encoder
• The LS151 multiplexer and LS155 demultiplexer
•   The LS280 7‐Segment decoder / driver
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155E21

### LOGIC CIRCUITS

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the fundamentals of digital logic, the theorems of Boolean algebra, the combinatory networks, the karnaugh’s maps, encoders and decoders, multiplexers and demultiplexers and the characteristics of the logic families of TTL and CMOS.
THEORETICAL TOPICS
• Binary system
• Logic functions
• The algebraic description of the logic gates
• The truth tables
• The theorems of the Boolean Algebra
• Techniques for the minimization of the logic functions through the application of the theorems
• Fundamental logic operators
• NOT, AND and OR logic operators
• Use of the AND and OR operators as control devices for the transfer of logic signals
• OR‐exclusive logic operator
• Classic form of a function
• Graphic representation of the functions
• AND‐OR‐NOT function
• NAND and NOR logic operators
• Use of the NAND and NOR operators as control devices for the transfer of logic signals
• The TTL family
• The CMOS family
• Characteristic parameters of the logic gates
• Definition and characteristics of a combinatory logic network
• The Karnaugh’ maps
• The BCD code
• Encoders, decoders, multiplexer and demultiplexer
•    Fault simulation
CIRCUIT BLOCKS • Logic gates, Boolean Algebra, Karnaugh’s maps and combinatory networks
• Encoder and decoder
• Multiplexer and demultiplexer
• Electric characteristics of the TTL logic gates
• The TTL logic family
• The CMOS  logic family
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155M18

### DIGITAL CIRCUITS

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the fundamentals of digital logic, the theorems of Boolean algebra, the combinatory networks, the karnaugh’s maps, encoders and decoders, multiplexers and demultiplexers and the characteristics of the logic families of TTL and CMOS.
THEORETICAL TOPICS
• Flip‐flop S‐R, with NOR and NAND operators
• Flip‐flop J‐K
• Flip‐flop J‐K Master‐Slave
• Flip‐flop T and D
• Synchronous and asynchronous 4 bit binary counter
• Synchronous and asynchronous decimal counter
• Parity generator
• Definition, classification and operating principle of the most common shift registers
•    Fault simulation
CIRCUIT BLOCKS
• Flip‐flops
• Counters
• Shift registers
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155M19R

### OSCILLATORS

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the characteristics of an oscillator in low frequency, in high frequency, of quartz and astable, monostable and bistable multivibrator.
THEORETICAL TOPICS
• Characteristics of RC‐phase shift oscillator
• Characteristics of Wien bridge oscillator with BJT transistor
• Characteristics of Wien bridge oscillator with Operational amplifier
• Characteristics of Huth‐Kuehn oscillator
• Characteristics of Colpitts oscillator
• Characteristics of Hartley oscillator
• Characteristics of Meissner oscillator
• Characteristics of Crystal oscillator
• Characteristics of non‐inverting crystal oscillator
• Characteristics of astable, monostable and bistable
multivibrators with IC 555
• Fault simulation
CIRCUIT BLOCKS
• Low frequency oscillators:
Phase shift oscillator
Wien transistor oscillator
Wien OA oscillator
• High frequency oscillators:
Huth‐Kuehn oscillator
Colpitts oscillator
Hartley oscillator
Meissner oscillator
• Quartz frequency oscillators:
Sinusoidal crystal oscillator
CMOS non inverting crystal oscillator
• Astable – Monostable – Bistable multivibrators
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155R22

### MEMORIES

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the principal characteristics of the memories starting from the elementary memory cells to reach the memories EPROM and RAM.
THEORETICAL TOPICS
• Memory classification
• Terminology and main characteristics
• Elementary memory cells
• Structure and operating principles
• ROM memory
• RAM memory
• Sequential memory
• Fault simulation
CIRCUIT BLOCKS
• Elementary memory cells
• Types of memories: RAM and EPROM
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155M20

### MULTIVIBRATORS

The design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering.
With this board the students can study the features of the multivibrators using both the transistor BJT that the operational amplifier.
THEORETICAL TOPICS
• BJT bistable multivibrator
• Resolution or transition time
• Bistable multivibrator using the operational amplifiers
• BJT astable multivibrator
• Astable multivibrator using the operational amplifiers
• BJT monostable multivibrator
• Monostable multivibrator using the operational amplifiers
• Schmitt trigger
• Schmitt trigger using the operational amplifiers
• Fault simulation
CIRCUIT BLOCKS
• Operation modes of a BJT bistable multivibrator (flip-flop)
• BJT bistable multivibrator (flip-flop) using the operational amplifiers
• Operation modes of a BJT astable multivibrator
• Astable multivibrator using the operational amplifiers
• Operation modes of a BJT monostable multivibrator
• Operation modes of a monostable multivibrator using the operational amplifiers
• Operation modes of a BJT Schmitt trigger • Schmitt trigger
Complete with theoretical and practical manual.
Dimensions of the board: 297x260mm

DL 3155M22