ELT 102

Digital Logic & Solid State Devices

ELT 102-350 · Hybrid · MVCC CIT Dept

ELT 102-350 — Digital Logic & Solid State Devices

A three credit hour class that introduces semiconductor fundamentals through digital logic systems — combining lecture, hands-on lab work, and practical application for careers in electronics and technology.

🏫 Hybrid Course ⏱️ 4 hrs In-Person / 4 hrs Online Weekly 📖 2 hrs Lecture / 2 hrs Lab per Session 🔬 10 Lab Exercises 📝 4 Lesson Exams + Final 🏛️ MVCC CIT Department
Semiconductor FundamentalsLessons 1–2
Active Devices & AmplifiersLessons 3–4
Logic FundamentalsLessons 5–6
Digital SystemsLessons 7–8
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Select a lesson below to begin. Each lesson covers one day of instruction across both analog solid-state devices and digital logic systems. Lab files, simulators, and exam resources are accessible from the sections below.
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Course Lessons — 8 Days

Each lesson includes lecture content, interactive activities, embedded simulators, and links to the matching lab exercise.

Day 1 Semiconductors
Semiconductor Fundamentals & Diodes
Atomic structure of semiconductor materials, P-N junction behavior, forward and reverse bias, and diode characteristic curves. Learn how diodes act as a switch, rectifier, and voltage regulator.
Key terms: P-N Junction, Doping, Forward Bias, Reverse Bias, Characteristic Curve
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Day 2 Semiconductors
Diode Applications, Power Supply Circuits & Optoelectronics
Rectifiers · Filters · Voltage Regulators · LEDs · Optocouplers
Half-wave and full-wave rectifier circuits, capacitive filter networks, ripple voltage, and oscilloscope measurement of AC/DC conversion. Includes voltage regulators, LEDs, photodiodes, optocouplers, and optical isolation circuit design.
Key terms: Rectifier, Ripple Voltage, Zener Diode, LED, Optocoupler, Optical Isolation
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Day 3 Active Devices
BJTs, FETs, MOSFETs, SCR & TRIAC
Transistors · Thyristors · High-Power Switching
NPN and PNP transistor operation, three BJT configurations (Common Emitter, Base, Collector), and DC load line analysis for bias calculation. Also covers JFETs vs. MOSFETs, SCR and TRIAC triggering, and high-power switching applications.
Key terms: BJT, MOSFET, JFET, SCR, TRIAC, DC Load Line, Thyristor, Biasing
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Day 4 Active Devices
Transistor Amplifiers & Op-Amps
Small-Signal AC · Voltage Gain · Operational Amplifiers
Small-signal AC amplifiers, voltage gain and impedance analysis for common-emitter circuits, and introduction to op-amp inverting and non-inverting configurations. Covers gain equations, virtual ground, and feedback fundamentals.
Key terms: Voltage Gain, Impedance, Common-Emitter, Op-Amp, Inverting, Non-Inverting, Feedback
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Day 5 Logic Fundamentals
Number Systems, Logic Gates & Boolean Algebra
Binary · Hex · Octal · AND · OR · NOT · NAND · NOR
Binary, octal, decimal, and hexadecimal conversions, arithmetic in base-N, signed binary (2's complement), and fundamental Boolean algebra laws. Introduction to AND, OR, NOT, NAND, NOR logic gates and truth table analysis.
Key terms: Binary, Hexadecimal, 2's Complement, Boolean Algebra, Truth Table, Logic Gate
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Day 6 Logic Fundamentals
Latches and Flip-Flops
Latches · Flip-Flops
XOR and XNOR gate functionality, Introduction to SR, D, and JK latches and flip-flops as fundamental sequential elements.
Key terms: SR Latch, D Flip-Flop, Sequential Logic
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Day 7 Digital Systems
Encoders, Decoders, Multiplexers, A/D & D/A Converters
MUX · DEMUX · ADC · DAC · BCD · 7-Segment
Priority encoders, binary decoders, 7-segment display drivers, BCD-to-decimal conversion, multiplexer and demultiplexer operation, and the fundamentals of analog-to-digital and digital-to-analog conversion including resolution and sampling.
Key terms: Encoder, Decoder, MUX, DEMUX, ADC, DAC, Resolution, Sampling Rate, BCD
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Day 8 Digital Systems
Counters, Timers & Oscillators
Ripple Counter · 555 Timer · Astable · Monostable · Crystal OSC
Asynchronous and synchronous counter design, modulus counters, up/down counting, the 555 timer in astable and monostable modes, RC time constant calculations, and oscillator circuits including crystal-controlled oscillators used in digital systems.
Key terms: Ripple Counter, Synchronous Counter, 555 Timer, Astable, Monostable, Oscillator, RC Time Constant
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Course Learning Outcomes

Upon successful completion of ELT 102-350, students will be able to:

Student Learning Outcomes (SLOs)

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Practice Exam Builder

Use this tool to build practice examine for any or all of the lessons in this course.

Exam Builder
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Practice Exam
Build questions based on any and all lessons, upto 25 questions, ability to select types of questions and difficulty.
Covers: Lessons 1–8 · Timed · Scored · Answer Review
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Cumulative Review
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Final Exam Review
Comprehensive review spanning all eight lessons. Includes formula reference, key concept summaries, circuit identification exercises, and a full cumulative practice assessment.
Covers: All Lessons · Formula Sheet · Circuit ID · Cumulative Quiz
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Lab Activities

Eight hands-on lab exercises covering circuit construction, measurement, and analysis. Each lab is linked to its corresponding lesson and requires use of the Electronics Lab Kit.

Lab 1 · Semiconductor Devices
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Diode Operations
Plot forward and reverse bias characteristic curves for Si and Ge diodes. Measure threshold voltage, dynamic resistance, and observe breakdown behavior using the DC power supply and DMM.
Skills: DMM · Power Supply · Curve Tracing · Forward/Reverse Bias
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Lab 2 · Rectifier Circuits
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Rectifier & Power Supply Analysis
Build and compare half-wave and full-wave bridge rectifier circuits. Add capacitive filter stages and measure ripple voltage with the oscilloscope. Verify zener regulation performance.
Skills: Oscilloscope · Bridge Rectifier · Filter · Ripple · Zener
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Lab 3 · BJT Transistors
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BJT Biasing & DC Load Line
Bias an NPN transistor in the common-emitter configuration. Plot the DC load line on the collector characteristics, identify the Q-point, and verify saturation vs. cutoff switching behavior.
Skills: BJT Biasing · Load Line · Q-Point · CE Configuration · Switching
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Lab 4 · Operational Amplifiers & Op-Amps
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Common-Emitter Amplifier & Op-Amp Configurations
Measure voltage gain, input/output impedance, and phase inversion for a CE amplifier. Then configure an LM741 op-amp as both inverting and non-inverting amplifiers and verify gain equations.
Skills: Gain Measurement · Impedance · CE Amp · Op-Amp · Inverting/Non-Inverting
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Lab 5 · Logic Gates
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Logic Gate Truth Table Verification
Wire AND, OR, NOT, NAND, NOR, XOR, and XNOR gates using 7400-series ICs. Complete full truth tables using LED output indicators and verify Boolean identities with multi-gate combinations.
Skills: 7400 ICs · Truth Tables · Logic Probe · Boolean Verification
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Lab 6 · Latches and Flip-Flops
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Flip-Flop Operation & Register Design
Construct and test SR, D, and JK flip-flop circuits using 74xx ICs. Demonstrate clocked operation, set/reset, and toggle modes. Chain flip-flops to build a 4-bit shift register.
Skills: D Flip-Flop · JK Flip-Flop · Clock Signal · Shift Register
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Lab 7 · Timers, Cscillators and Counters
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Binary & Decade Counter Circuits
Build a 4-bit ripple counter using JK flip-flops and a synchronous decade counter using a 74160 IC. Observe waveforms with the oscilloscope and calculate count frequency vs. clock input.
Skills: Ripple Counter · Synchronous Counter · 74160 · Frequency · Waveform Analysis
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Lab 8 · Encoders & Decoders Muxes and Demuxs and A-to-D and D-to-A Converts
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7-Segment Display Decoder & Priority Encoder
Wire a BCD-to-7-segment decoder IC to drive a common-cathode display. Design and test a priority encoder that translates switch inputs to a 3-bit binary output code.
Skills: BCD Decoder · 7-Segment Display · Priority Encoder · IC Wiring
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Content Development Tools

AI-assisted prompt builders for generating graphics, lesson content, cheatsheets, activities, worked examples, and case studies aligned to ELT 102 lessons, labs, and learning outcomes. Each tool builds a ready-to-paste prompt for Claude, ChatGPT, Gemini, or Perplexity.

Tool · Prompt Builder
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Instructional Graphics Prompt Builder
Build ready-to-paste prompts for schematics, waveform and oscilloscope illustrations, timing diagrams, I-V and load-line curves, K-maps, IC pinouts, and breadboard layouts for any ELT 102 lesson.
Covers: Schematics · Waveforms · Timing Diagrams · Characteristic Curves · Pinouts
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Tool · Prompt Builder
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Instructional Content Prompt Builder
Build prompts for lesson text, circuit walk-throughs, pre-lab briefings, troubleshooting narratives, and study guides, with control over math treatment and equation format.
Covers: Lesson Text · Circuit Walk-Throughs · Pre-Lab Briefings · Study Guides
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Tool · Prompt Builder
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Cheatsheet Prompt Builder
Build prompts for one-page quick references: formula sheets, schematic symbol guides, IC pinouts, truth tables, number-system charts, resistor color codes, and test-equipment settings.
Covers: Formula Sheets · Truth Tables · Pinouts · Color Codes · Index Cards
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Tool · Prompt Builder
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Instructional Activities Prompt Builder
Build prompts for breadboard labs, simulation exercises, fault-insertion troubleshooting, and predict-observe-explain activities for in-person, online, or hybrid delivery, with built-in lab safety constraints.
Covers: Breadboard Labs · Simulations · Fault Insertion · Calculated vs. Measured
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Tool · Prompt Builder
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Worked Examples Prompt Builder
Build prompts for step-by-step worked problems — circuit calculations, load-line analysis, Boolean and K-map simplification, timing traces, and datasheet reading — using a Given · Find · Solution · Check structure.
Covers: Circuit Calculations · Load Lines · K-Maps · Timing Traces · Datasheets
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Tool · Prompt Builder
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Case Study Prompt Builder
Build prompts for scenario-based case studies — field-service troubleshooting, design trade-offs, quality control, and real-world component failures — with measurement data for students to analyze.
Covers: Troubleshooting · Design Decisions · Quality Control · Real Incidents
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