ET362 · Logic Gates and Combinational Circuits

Logic Gates and Combinational Circuits

A course package for the ET platform: a Logic Gates card, an Arithmetic & Code Conversion card, an RS Flip-Flops card and a D & JK Flip-Flops card for the study of digital circuits, all powered by the base system at safety extra-low voltage, with guided multimedia courseware.

Experiments

Investigation of the NOT function and the AND and NAND gates
Investigation of the OR and NOR gates
Investigation of XOR and XNOR (XNOR built from the XOR and NOT gates)
Half adders and full adders: from logic gates to the 4-bit full adder
Subtracting circuits: two's-complement subtraction with the adder / subtractor
Code conversion: BCD to 7-segment and binary to Gray code
Investigation of the RS-NOR flip-flop
Investigation of the clocked RS flip-flop
Static (level-controlled) and dynamic (edge-triggered) D flip-flops
JK flip-flops: set, reset, hold and toggle
JK master-slave flip-flop
Flip-flop applications: debouncing, data storage, toggling and frequency division

ET362 Logic Gates, Arithmetic and Code Conversion, RS Flip-Flops, and D and JK Flip-Flops experiment cards

Description

The platform teaches the fundamentals of digital circuits through guided, hands-on experiments. The Logic Gates Card carries the six basic gate types - AND, OR, NOT, NAND, NOR and XOR - each with its own input sockets and an output LED. The Arithmetic & Code Conversion Card carries a 4-bit full adder that, with an XOR stage on its B inputs and a mode input M, works as an adder or as a two's-complement subtractor, plus a BCD to 7-segment decoder with display and a binary to Gray code converter. The RS Flip-Flops Card carries an RS-NOR flip-flop built from cross-coupled NOR gates and a clocked RS flip-flop built from NAND gates. The D & JK Flip-Flops Card sets a static (level-controlled) D latch beside a dynamic (edge-triggered) D flip-flop, and a JK flip-flop beside a JK master-slave flip-flop. XNOR is built by following the XOR gate with the NOT gate. Every output has an LED and a measuring socket, so logic states can be read directly or acquired with the ET300 digital I/O. Inputs are set from the ET300 digital outputs or by patching to the +5 V and GND sockets. The supply comes from the ET300 base system.

Courseware

The interactive multimedia course combines theory with guided experiments: Boolean algebra and truth tables, universal gates, binary arithmetic with carry and two's complement, number codes (BCD, 7-segment and Gray code), RS, D and JK flip-flops - static and dynamic, edge-triggered and master-slave - with their timing diagrams and applications. Student answers are evaluated automatically, and the full course - at least 16 hours of directed instruction (4 hours per card) - includes self-assessment.

Scope of delivery

Logic Gates Card (AND, OR, NOT, NAND, NOR, XOR)
Arithmetic & Code Conversion Card (adder / subtractor, BCD to 7-segment, binary to Gray)
RS Flip-Flops Card (RS-NOR flip-flop, clocked RS flip-flop)
D & JK Flip-Flops Card (static and dynamic D, JK and JK master-slave flip-flops)
Storage case
Multimedia course software with course browser
Connection cables

Specifications

Experiment cards Logic Gates Card, Arithmetic & Code Conversion Card, RS Flip-Flops Card, D & JK Flip-Flops Card

Key components 74HC00, 74HC02, 74HC04, 74HC08, 74HC32, 74HC86; 74HC283, 74HC4511 with 7-segment LED display; 74HC74, 74HC112; CD4042B, CD4027B; output LEDs

Logic family 74HC high-speed CMOS and CD4000 CMOS, 5 V logic levels

Measuring points Gate inputs A, B and outputs Y; adder A0–A3, B0–B3, M, S0–S3, C4; BCD inputs A–D; binary B0–B3 and Gray G0–G3; S, R, CLK, D, EN, J, K, Q, /Q; +5 V, GND

Supply Fixed +5 V from base system, safety extra-low voltage

Measurement LED on every output; ET300 16-channel digital I/O and oscilloscope

Course duration Min. 16 hours of guided instruction, with self-assessment

Base system Requires ET300 (interface + experimenter) - not included