What are the Boolean logic gate symbols (AND, OR, NOT, XOR, NAND, NOR)?

In digital electronics: AND is represented by ∧ ($A \cdot B$), OR by ∨ ($A + B$), NOT by ¬ ($\bar{A}$), XOR by ⊕ ($A \oplus B$), NAND by ⊼ ($\overline{A \cdot B}$), and XNOR by ⊙.

Electrical Symbols (⏻, ⏚, ∿, ⎓, Ω, µ, ⚡, ⏧, ⊕, ¬): Copy & Paste Circuit & Schematic Signs

Q: What are the three main grounding symbols in electrical engineering?

IEEE 315 and IEC 60417 define three distinct grounds: 1. Earth Ground (⏚ / IEC 60417-5017), depicting 3 descending horizontal lines connected to physical earth soil to dissipate lightning and short-circuit faults; 2. Signal Ground (⏛ / IEC 60417-5018), depicting a triangle for zero-volt reference on printed circuit boards; and 3. Chassis Ground (⏜ / IEC 60417-5019), depicting diagonal rake lines connected to the metallic enclosure.

Q: What is the Alt code for the Ohm symbol (Ω) and Power symbol (⏻)?

On Windows with a numeric keypad: Ohm = Alt + 234 / Alt + 937 (Ω), Power = Alt + 9211 (⏻), Earth Ground = Alt + 9178 (⏚), AC Sine Wave = Alt + 8767 (∿), DC = Alt + 9091 (⎓), Micro = Alt + 230 / Alt + 0181 (µ), Fuse = Alt + 9191 (⏧), XOR Gate = Alt + 8853 (⊕), and NOT Inverter = Alt + 0172 (¬).

Q: How do you type electrical symbols in HTML?

HTML character entities include Ω or Ω (Ω Ohm), µ or µ (µ Micro), ¬ or ¬ (¬ NOT), &oplus; or ⊕ (⊕ XOR), ⏻ (⏻ Power), ⏚ (⏚ Ground), ∿ (∿ AC), ⎃ (⎓ DC), and ⏧ (⏧ Fuse).

Q: How do you draw electrical schematics in LaTeX?

In LaTeX, use the 'circuitikz' package (e.g., \draw (0,0) to[R=$R_1$] (2,0) to[C=$C_1$] (4,0) node[ground]{};) for professional vector electrical schematics and PCB circuit diagrams.

IEEE 315, IEC 60617 & CIRCUIT SCHEMATIC STANDARDS

The Principles of Electrical Schematics, Circuit Theory, and Global Standards

Electrical and electronic symbols—encompassing equipment power controls (⏻ Power, ⏼ Toggle), earthing architectures (⏚ Earth Ground, ⏛ Signal Ground, ⏜ Chassis Ground, ⏝ Equipotentiality), waveform indicators (∿ Alternating Current, ⎓ Direct Current), circuit metrology units (Ω Ohm, µ Micro, ⏧ Fuse), electrical hazards (⚡ High Voltage), and Boolean logic gates (⊕ XOR, ¬ NOT, ∧ AND, ∨ OR, ⊼ NAND)—form the universal graphical syntax of electrical engineering. Standardized globally by the International Electrotechnical Commission (IEC 60617 / IEC 60417) and the Institute of Electrical and Electronics Engineers (IEEE 315 / ANSI Y32.2), these glyphs enable error-free schematic drafting, PCB design, power utility grids, and automated industrial wiring.

In digital computing, electrical symbols reside within the Unicode Miscellaneous Technical block (U+2300 to U+23FF), the Mathematical Operators block (U+2200 to U+22FF), and the Greek and Coptic block (U+0370 to U+03FF). Below, discover the definitive guide to earthing physics, AC/DC power dynamics, digital logic truth tables, and verified cross-platform shortcuts.

EARTHING TAXONOMY, AC/DC & POWER METROLOGY

The Four Grounding Systems, AC vs. DC Dynamics, and Ohm's Law Metrology

Understanding the distinct physical boundaries of electrical earthing and power distribution is vital for circuit safety and signal integrity:

⏚

Earth & Signal Ground

Protective Earth vs. 0V Reference

Critical functional differences:

Earth Ground (⏚ / IEC 60417-5017): Physical connection to earth soil via copper rods, ensuring human safety and tripping breakers during insulation faults.
Signal Ground (⏛ / IEC 60417-5018): Low-impedance 0V return plane on printed circuit boards for microcontrollers and high-speed analog circuits.

⏜

Chassis & Equipotentiality

Enclosures & Medical Bonding

Eliminating dangerous touch potentials:

Chassis Ground (⏜ / IEC 60417-5019): Connection to the metallic frame/chassis of an appliance to prevent static shocks.
Equipotentiality (⏝ / IEC 60417-5021): Hospital operating room bonding linking all metal surfaces to prevent micro-voltage ground loops.

∿

AC vs. DC & 3-Phase

Waveforms & Grid Distribution

Power transmission fundamentals:

Alternating Current (∿): Sinusoidal current reversing at 50Hz / 60Hz, ideal for high-voltage grid transmission via transformers.
Direct Current (⎓): Unidirectional continuous electron flow powering semiconductors, batteries, and solar photovoltaics.
Phase (ɸ): 1-phase residential (120V / 230V) vs. 3-phase industrial power (400V / 480V).

Ohm's Law & Logic Gates

Impedance & Boolean Algebra

Core electrical and digital math:

Ohm (Ω): Resistance unit (V = I × R) and AC complex impedance (Z = R + jX).
XOR Gate (⊕): Digital logic parity check; outputs true only if inputs differ.
NOT Gate (¬): Digital inverter inverting binary state (1 → 0, 0 → 1).

MASTER ELECTRICAL MATRIX

Master Electrical & Schematic Symbols Reference & Alt Code Lookup Matrix

The following exhaustive reference table catalogs all primary power switches, grounding glyphs, AC/DC waveforms, passive component units, and Boolean logic gates with their verified Windows Alt codes, Unicode hexadecimal points, HTML entities, and LaTeX commands:

Glyph	Symbol Name & Standard	Electrical Definition & Applications	Windows Alt Code	Unicode Hex	HTML Entity	LaTeX Command
⏻	Power Symbol (IEC 60417-5009 Standby / Power On-Off) IEC 60417-5009	Universal power switch glyph combining binary 1 (vertical line) inside binary 0 (circle) indicating power state control.	`Alt 9211`	`U+23FB`	`⏻`	`\textpower`
⏼	Power On-Off Toggle Symbol IEC 60417-5010	Toggle power switch symbol indicating a mechanical latching button for full circuit connection or disconnection.	`Alt 9212`	`U+23FC`	`⏼`	`\textpowertoggle`
⏽	Power ON Symbol (Binary 1) IEC 60417-5007	Vertical bar representing binary 1 (closed circuit / energized state).	`Alt 9213`	`U+23FD`	`⏽`	`\textpoweron`
⭘	Power OFF Symbol (Binary 0) IEC 60417-5008	Open circle representing binary 0 (open circuit / de-energized state).	N/A	`U+2B58`	`⭘`	`\textpoweroff`
∿	Alternating Current Symbol (AC / Sine Wave) IEC 60417-5032	Sinusoidal waveform denoting alternating current where electric charge periodically reverses direction.	`Alt 8767`	`U+223F`	`∿`	`\sim`
⎓	Direct Current Symbol (DC / Solid & Dashed Bar) IEC 60417-5031	Solid line over three dashed dashes denoting unidirectional constant direct current electricity.	`Alt 9091`	`U+2393`	`⎃`	`\textdirectcurrent`
⚡	High Voltage Warning Sign ISO 7010-W012	International safety pictogram alerting to dangerous electrical voltage and risk of electric shock.	`Alt 9889`	`U+26A1`	`⚡`	`\lightning`
🗲	Electric Arrow / High Voltage Flash IEEE Electrical Warning	Electrical arcing flash indicating dangerous electrical busbars and live terminals.	`Alt 128498`	`U+1F5F2`	`🗲`	`\texthighvoltage`
ɸ	Phase Symbol (Electrical Phase / 1-Phase & 3-Phase) IEEE Power Engineering	Denotes single-phase (1ɸ) or three-phase (3ɸ) AC power distribution lines and phase angles.	`Alt 632`	`U+0278`	`ɸ`	`\Phi`
⏾	Sleep / Standby Mode Symbol (Half Moon) IEC 60417-5011	Crescent moon glyph indicating low-power sleep or suspended RAM standby state.	`Alt 9214`	`U+23FE`	`⏾`	`\textsleep`
⏚	Earth Ground (Protective Earth / Safety Ground) IEC 60417-5017	Three descending horizontal lines connected to physical earth soil to safely dissipate electrical faults and lightning.	`Alt 9178`	`U+23DA`	`⏚`	`\ground`
⏛	Signal Ground (0V Reference Plane) IEC 60417-5018	Zero-volt reference plane ground in analog, RF, and digital printed circuit board (PCB) layouts.	`Alt 9179`	`U+23DB`	`⏛`	`\signalground`
⏜	Chassis Ground (Frame Ground) IEC 60417-5019	Ground connection to the metallic frame or enclosure of electrical equipment to eliminate touch potential.	`Alt 9180`	`U+23DC`	`⏜`	`\chassisground`
⏝	Equipotentiality Symbol (Equipotential Bonding) IEC 60417-5021	Indicates conductive parts brought to identical electrical potential to eliminate ground loops in medical rooms.	`Alt 9181`	`U+23DD`	`⏝`	`\equipotential`
Ω	Ohm Symbol (Electrical Resistance & Impedance) SI Derived Unit (V/A)	SI derived unit of electrical resistance and impedance ($R = V/I$); named after Georg Simon Ohm.	`Alt 234`	`U+03A9`	`Ω / Ω`	`\Omega`
µ	Micro Symbol (Capacitance & Inductance Prefix) SI Metric Prefix (10^-6)	Metric prefix denoting one millionth ($10^{-6}$), standard for microfarads ($mu$F) and microhenries ($mu$H).	`Alt 230`	`U+00B5`	`µ / µ`	`\mu`
⏦	AC Direct Supply / Variable Frequency IEC 60417-5033	Schematic symbol representing an AC electrical generator or variable-frequency drive power supply.	`Alt 9190`	`U+23E6`	`⏦`	`\textacsupply`
⏧	Electrical Fuse Symbol IEC 60417-5016	Overcurrent protective device with a sacrificial metal wire that melts during excessive short-circuit current.	`Alt 9191`	`U+23E7`	`⏧`	`\textfuse`
⌁	Electric Spark / Arcing Gap IEEE Transient Suppression	Schematic indicator for spark gaps, dielectric breakdown, and surge arrestors.	`Alt 8961`	`U+2301`	`⌁`	`\spark`
🔋	Battery / DC Energy Storage Cell ISO 7000-0248	Chemical energy storage device providing continuous direct current electromotive force (EMF).	`Alt 128267`	`U+1F50B`	`🔋`	`\battery`
🔌	Electric Plug / Mains Outlet Connection AC Mains Power	AC power plug connecting equipment to building electrical utility mains.	`Alt 128268`	`U+1F50C`	`🔌`	`\electricplug`
💡	Light Bulb / Resistive Electrical Load Electrical Load	Incandescent or LED illumination load converting electrical power into luminous flux.	`Alt 128161`	`U+1F4A1`	`💡`	`\lamp`
⊼	NAND Gate Operator Universal Boolean Logic	Not-AND Boolean operator outputting false only when all input logic states are true.	`Alt 8892`	`U+22BC`	`⊼`	`\bar{\wedge}`
⊽	NOR Gate Operator Universal Boolean Logic	Not-OR Boolean operator outputting true only when all input logic states are false.	`Alt 8893`	`U+22BD`	`⊽`	`\bar{\vee}`
⊕	XOR Gate Operator (Exclusive OR) Digital Logic & Adders	Modulo-2 addition operator outputting true when inputs differ; core of half-adders and parity checkers.	`Alt 8853`	`U+2295`	`&oplus; / ⊕`	`\oplus`
⊙	XNOR Gate Operator (Equivalence Gate) Digital Logic Comparator	Exclusive-NOR operator outputting true when both binary inputs are equal.	`Alt 8857`	`U+2299`	`⊙`	`\odot`
∧	AND Gate Operator (Logical Conjunction) Boolean Algebra ($A \cdot B$)	Boolean product operator outputting true only if all connected input signals are asserted high.	`Alt 8743`	`U+2227`	`∧`	`\wedge`
∨	OR Gate Operator (Logical Disjunction) Boolean Algebra ($A + B$)	Boolean sum operator outputting true if at least one connected input signal is asserted high.	`Alt 8744`	`U+2228`	`∨`	`\vee`
¬	NOT Gate / Inversion Inverter Boolean Inversion ($\bar{A}$)	Logic inverter operator inverting high (1) to low (0) and low (0) to high (1).	`Alt 0172`	`U+00AC`	`¬ / ¬`	`\neg`
⊤	Logic High / VCC (True State) Tautology / Digital 1	Digital high voltage state ($+5$V / $+3.3$V) representing Boolean binary 1.	`Alt 8868`	`U+22A4`	`⊤`	`\top`
⊥	Logic Low / Ground (False State) Contradiction / Digital 0	Digital low zero-volt reference state representing Boolean binary 0.	`Alt 8869`	`U+22A5`	`⊥`	`\bot`

KEYBOARD SHORTCUTS & SCHEMATIC PUBLISHING

How to Type Electrical Symbols on Windows, Mac, Word, and LaTeX

Follow these verified step-by-step methods to type and insert the Power symbol, Earth Ground, AC sine wave, DC symbol, Ohm symbol, and Micro prefix across all desktop operating systems, CAD software, and circuit simulation environments:

Windows 10 & 11 Keyboards

Numeric Keypad Alt Codes

Power Symbol (⏻): Hold Alt + type 9211
Earth Ground (⏚): Hold Alt + type 9178
Signal Ground (⏛): Hold Alt + type 9179
AC Sine Wave (∿): Hold Alt + type 8767
DC Symbol (⎓): Hold Alt + type 9091
Ohm Symbol (Ω): Hold Alt + type 234 (or 937)
Micro Prefix (µ): Hold Alt + type 230 (or 0181)
Electrical Fuse (⏧): Hold Alt + type 9191
XOR Gate (⊕): Hold Alt + type 8853
NOT Inverter (¬): Hold Alt + type 0172

Apple macOS Keyboards

Option Shortcuts & Character Viewer

Option + Z: Types Ω (Greek Omega / Ohm).
Option + M: Types µ (Micro prefix).
Option + L: Types ¬ (Logical NOT).
Character Viewer: Press Control + Command + Space, type power (⏻), ground (⏚), or ac (∿), and double-click to insert.

Word & Google Docs

Unicode Alt+X Hex Toggles

Power: Type 23FB + press Alt + X → ⏻
Earth Ground: Type 23DA + press Alt + X → ⏚
AC Sine Wave: Type 223F + press Alt + X → ∿
DC Symbol: Type 2393 + press Alt + X → ⎓
Ohm: Type 03A9 + press Alt + X → Ω
Micro: Type 00B5 + press Alt + X → µ
Fuse: Type 23E7 + press Alt + X → ⏧

LaTeX & Circuitikz

Schematic Publishing & Math

Circuitikz: \draw (0,0) to[R=$Omega$] (2,0) to[C=$mu$F] (4,0) node[ground]{};
LaTeX Math: \Omega (Ω), \mu (µ), \oplus (⊕), \neg (¬), \sim (∿).
HTML Entities: Ω (Ω), µ (µ), &oplus; (⊕), ¬ (¬).

FREQUENTLY ASKED QUESTIONS

Frequently Asked Questions About Electrical Symbols

IEEE 315 and IEC 60417 define three distinct grounds: 1. Earth Ground (⏚ / IEC 60417-5017), depicting 3 descending horizontal lines connected to physical earth soil to dissipate lightning and short-circuit faults; 2. Signal Ground (⏛ / IEC 60417-5018), depicting a triangle for zero-volt reference on printed circuit boards; and 3. Chassis Ground (⏜ / IEC 60417-5019), depicting diagonal rake lines connected to the metallic enclosure.

Alternating Current (∿, Unicode U+223F, IEC 60417-5032) is represented by a sine wave depicting periodic reversal of electric charge direction, used in electrical power grids. Direct Current (⎓, Unicode U+2393, IEC 60417-5031) is represented by a continuous line over three dashed dashes denoting unidirectional charge flow from batteries and DC power supplies.

On Windows with a numeric keypad: Ohm = Alt + 234 / Alt + 937 (Ω), Power = Alt + 9211 (⏻), Earth Ground = Alt + 9178 (⏚), AC Sine Wave = Alt + 8767 (∿), DC = Alt + 9091 (⎓), Micro = Alt + 230 / Alt + 0181 (µ), Fuse = Alt + 9191 (⏧), XOR Gate = Alt + 8853 (⊕), and NOT Inverter = Alt + 0172 (¬).

The universal Power symbol (⏻, Unicode U+23FB) is defined by IEC 60417-5009 as the 'Standby / Power On-Off' function. It is created by superimposing binary 1 (a vertical line representing an energized closed circuit) inside binary 0 (a circle representing an open de-energized circuit).

Equipotential bonding (⏝, Unicode U+23DD, IEC 60417-5021) is the practice of conductively connecting all exposed metallic structural elements and electrical equipment to ensure they remain at the exact same electrical potential, eliminating touch voltages and preventing lethal microshocks in medical operating rooms.

In digital electronics: AND is represented by ∧ ($A cdot B$), OR by ∨ ($A + B$), NOT by ¬ ($ar{A}$), XOR by ⊕ ($A oplus B$), NAND by ⊼ ($overline{A cdot B}$), and XNOR by ⊙.

HTML character entities include Ω or Ω (Ω Ohm), µ or µ (µ Micro), ¬ or ¬ (¬ NOT), &oplus; or ⊕ (⊕ XOR), ⏻ (⏻ Power), ⏚ (⏚ Ground), ∿ (∿ AC), ⎃ (⎓ DC), and ⏧ (⏧ Fuse).

In LaTeX, use the circuitikz package (e.g., \draw (0,0) to[R=$R_1$] (2,0) to[C=$C_1$] (4,0) node[ground]{};) for professional vector electrical schematics and PCB circuit diagrams.

EXPLORE MORE SYMBOLS & TYPING GUIDES