Electrical Engineering posters
LearnPosters has 100 free printable electrical engineering posters, grouped into 7 topics: Circuit analysis, Electronics, Signals & systems, Power, Electromagnetics. Circuits, signals and power, with the laws and transforms. They are made for undergraduates, professionals and anyone revising the subject. Every one downloads as a vector PDF that prints sharp on US Letter, A4 or a copy-shop A1.
The analysis techniques an electrical degree runs on — from Kirchhoff to the Laplace domain to three-phase power.
100 free printable posters · 7 topics · vector PDF
Circuit analysis
Kirchhoff, Thevenin, AC and phasors.
Ohm's Law & Power
The three power forms alongside V = IR, and why the power rating decides the part.
KCL & KVL
Kirchhoff's two laws written in the sign convention circuit analysis actually uses.
Nodal Analysis
The node-voltage method, from choosing a datum to checking the power balance.
Mesh Analysis
The mesh-current method for planar circuits, supermesh case included.
Thevenin Equivalent
Any linear two-terminal network as one source and one series resistance.
Norton & Source Transforms
Thevenin's current-source dual, and the one-line conversion either way.
Superposition in Circuits
One source at a time in a linear circuit, then add the contributions with sign.
Maximum Power Transfer
When matching the load to the source maximises power, and what it costs in efficiency.
RC & RL Transients
One exponential describes every first-order circuit, whatever is charging or decaying.
Phasors & Impedance
Every passive element as one complex number, with the phase it forces.
AC Power Triangle
Real, reactive and apparent power as one right triangle, cosine the power factor.
Resonance & Q
Where reactances cancel, how sharp the peak, and the voltage Q builds.
Divider Rules
Voltage and current dividers, and the loading that quietly breaks both.
Capacitor & Inductor Laws
The two reactive elements as exact duals, from defining law to DC behaviour.
Two-Port Parameters
Four ways to describe the same black box, and what each one is convenient for.
Electronics
Diodes, transistors and op-amps.
Diode Behaviour
The exponential law, the 0.7 V model, and when each one is honest.
Rectifiers
Half-wave, full-wave and bridge, and the ripple each one leaves behind.
Zener Regulator
Sizing the series resistor for a shunt regulator, worst case at both extremes.
Driving an LED
Why an LED is a current device, and how to size the resistor that sets it.
BJT Operating Regions
Which region a bipolar transistor is in, read straight off its junction bias.
MOSFET Regions
Cut-off, ohmic and saturation for a field-effect device, and the naming trap.
BJT vs MOSFET
Current control against voltage control, and what each choice costs in a real design.
Common-Emitter Amp
Biasing the voltage-divider stage, then reading gain off two resistors.
Small-Signal Models
Linearising a transistor around its bias point, and what transconductance actually is.
Op-Amp Golden Rules
The two assumptions that solve almost every op-amp circuit, and their exact conditions.
Op-Amp Configurations
Six op-amp circuits, with their gain expressions and input impedances.
Op-Amp Non-Idealities
What the datasheet is warning about, sorted into DC errors and frequency limits.
Negative Feedback
Analogue design's core trade: raw gain for accuracy and bandwidth.
Transistor as a Switch
Driving a transistor fully on, and counting conduction and switching loss.
Linear vs Switching
Two ways to make a stable rail, weighed on efficiency, noise and parts.
Signals & systems
Convolution, Fourier and Laplace.
Signal Types
The six distinctions that decide which analysis tool a signal is entitled to.
LTI Properties
What linear and time-invariant require, and the labels alongside them.
Convolution
Flip, shift, multiply, integrate — the graphical method in order.
Impulse & Step Response
The two responses that characterise a system, and the calculus linking them.
Fourier Series
Periodic signals as sums of harmonics, and what smoothness does to them.
Fourier Pairs
The transform pairs and properties worth carrying in your head.
Laplace Pairs
The one-sided Laplace pairs that turn a differential equation into ordinary algebra.
Transfer Functions
Output over input in the s domain, and the substitution that gives frequency response.
Poles & Zeros
Where the poles sit, what that says about stability, and what zeros can and cannot do.
Bode Plots
Sketching magnitude and phase from the factored transfer function, corner by corner.
Sampling & Aliasing
Nyquist's condition, where aliases land, and why the filter has to come first.
The z-Transform
Laplace for discrete time, with the unit circle as its stability boundary.
DFT & FFT
What a finite-record spectrum gives you, and what the FFT changes.
Filter Responses
Five classical approximations at the same order, and the compromise each one accepts.
Power
Three-phase, transformers and machines.
Three-Phase Power
Line and phase quantities, and exactly where the √3 belongs in each expression.
Wye & Delta
The two three-phase connections, and what each does to voltage and current.
Power-Factor Correction
Sizing capacitance to raise an inductive installation's power factor to a target.
The Per-Unit System
Every quantity as a fraction of a chosen base, so turns ratios drop out.
Transformer Equations
Turns ratio for voltage, current and impedance, and why DC destroys one.
Transformer Losses
Where a transformer's energy goes, and which bench test reveals each kind of loss.
Induction Motor Slip
Synchronous speed, slip, and why the rotor can never quite catch up.
Motor Types
Five machines side by side, on how their speed is set and what they are chosen for.
Synchronous Machines
The machine that sets grid frequency, and what its excitation actually controls.
Line Parameters
What an overhead line contributes electrically, split into series and shunt effects.
Fault Types
The shunt and series faults a network sees, in rough order of frequency.
Earthing & Protection
What each protective device is for, and the separate job earthing does.
Harmonics
Where harmonic currents come from, and the heating and neutral problems they cause.
Renewables on the Grid
What changes when weather-driven inverters replace rotating machines.
Electromagnetics
Fields, transmission lines and antennas.
Maxwell's Equations
The four field equations in differential form, and what each asserts.
Gauss's Law
Flux through a closed surface, and the symmetry that makes it usable.
Boundary Conditions
Which field components stay continuous at an interface, and which jump.
Plane Waves
The uniform plane wave: geometry, speed, impedance and what a dielectric does to it.
Poynting Vector
Where electromagnetic power flows, and how much crosses a square metre.
Skin Effect
Why high-frequency current crowds to the surface, and how deep it goes.
Transmission Lines
Characteristic impedance, propagation velocity, and when a wire stops being a wire.
Reflection & VSWR
One mismatch expressed four ways, so any figure reads at sight.
Impedance Matching
Matching any load to the line, with reactance, transformers or stubs.
The Smith Chart
How to read the chart before using it: what the circles, the rotation and the centre mean.
Waveguide Modes
Why a hollow guide has a cutoff, which mode dominates, and the usable band.
Antenna Fundamentals
Gain, directivity, beamwidth and polarisation, and how the four constrain each other.
Antenna Types
Five antenna families, their radiation patterns and their typical jobs.
Link Budget
Adding gains and subtracting losses in decibels to predict what a receiver will see.
Digital logic
Gates, Boolean algebra and state machines.
Logic Gates
Seven gates, their Boolean expressions, and when each output is 1.
Boolean Algebra
The identities that shrink an expression before a Karnaugh map is even drawn.
De Morgan's Theorems
Break the bar, change the operator — and why NAND and NOR are universal.
SOP & POS Forms
Turning a truth table into a canonical expression, by minterms or by maxterms.
Karnaugh Maps
Grouping adjacent ones on a Gray-coded map to minimise up to four variables by eye.
Two's Complement
The signed representation that lets one adder serve both signed and unsigned work.
Adders
From half adder to carry look-ahead, and the delay each one costs.
Mux & Decoder
Two combinational blocks that are near mirror images of each other.
Latches vs Flip-Flops
Level-sensitive against edge-triggered storage, and why synchronous design picks one.
Flip-Flop Types
Four flip-flops, what each does on the clock edge, and where each is used.
Counters & Registers
The sequential building blocks, sorted by clocking and by what they hold.
State Machine Design
From a written specification to a single-clock synchronous machine, in six moves.
Setup & Hold Time
The two timing windows around a clock edge, and the very different fixes each needs.
Logic Families
Five logic families on supply voltage, speed and where each is still used.
Embedded systems
Microcontrollers, interfacing and timing.
Inside an MCU
What a microcontroller contains beyond the processor core, block by block.
GPIO & Pull Resistors
The pin configurations, and what each leaves an open input doing.
Polling vs Interrupts
Two ways to notice an event, weighed on cycles and on complexity.
Writing an ISR
What belongs inside an interrupt handler, and what in the main loop.
Timers & PWM
Period and duty cycle as counter values, and the arithmetic that connects them to hertz.
ADC Resolution
Step size, reference voltage, and why more bits alone add no accuracy.
UART, SPI & I2C
Five serial buses compared on wire count, speed and how devices get addressed.
UART Framing
What one asynchronous character looks like on the wire, bit by bit.
Switch Debouncing
Turning a burst of contact bounce into one press event, without blocking.
Driving Loads
Getting from a logic pin to a relay, motor or solenoid it could never drive directly.
Level Shifting
Five ways to join parts on different logic voltages, and where each fails.
Volatile & Atomicity
Two distinct bugs that both look like a variable changing value at random.
RTOS Scheduling
What a real-time kernel provides, and when a superloop is still enough.
Low-Power Modes
Where the microamps go, what each sleep depth costs, and what saves battery.
Questions about the Electrical Engineering posters
- What is the Electrical Engineering section of LearnPosters?
- Circuits, signals and power, with the laws and transforms. The analysis techniques an electrical degree runs on — from Kirchhoff to the Laplace domain to three-phase power.
- What topics do the Electrical Engineering posters cover?
- 100 posters across 7 topics. Circuit analysis — Kirchhoff, Thevenin, AC and phasors. Electronics — Diodes, transistors and op-amps. Signals & systems — Convolution, Fourier and Laplace. Power — Three-phase, transformers and machines. Electromagnetics — Fields, transmission lines and antennas. Digital logic — Gates, Boolean algebra and state machines. Embedded systems — Microcontrollers, interfacing and timing.
- Who are the Electrical Engineering posters for?
- The electrical engineering charts are pitched at undergraduates and professionals — the frameworks and equations a course keeps returning to. Nothing here is tied to a school year, so a curious beginner and someone revising the same material for an exam are looking at the same electrical engineering chart.
- Which Electrical Engineering poster should I print first?
- Ohm's Law & Power, KCL & KVL and Nodal Analysis are the ones people reach for first — they are the references the rest of the electrical engineering set assumes you already have on the wall.Ohm's Law & PowerKCL & KVLNodal Analysis
- Are the Electrical Engineering posters free to print?
- Yes — all 100 of them. Each electrical engineering poster is a free vector PDF that needs no account, prints on US Letter or A4, and enlarges to A1 without softening. Home, classroom, library and tutoring use are all covered by the licence.Read the licence
Where the electrical engineering charts come from
These posters summarise. When you need the full account — or the normative text a chart is compressing — start here.
- IEEE standards — Institute of Electrical and Electronics Engineers. Symbols, units and protocol definitions used across these sheets.
- IEC 60617 graphical symbols — International Electrotechnical Commission. The circuit-symbol standard the schematic charts follow.