Mono Line Lib — A Unified, Clean, Professional, Harmonized Schematic Library for Altium Designer

The Ultimate Minimal, Beautiful, Rule-Driven Electrical Symbol System

Monoline is not “just another component library”.
It is a design language, a visual standard, and a complete schematic philosophy.

Most public component libraries suffer from:

• random inconsistent grids
• mismatched fonts
• weird colors
• messy shapes
• multiple duplicate symbols
• unreadable pin groups
• ugly wire colors (default Altium blue)
• symbols drawn with no respect to functional clarity
• components that look manufactured by hundreds of different people

Monoline solves all of these problems by enforcing a strict, elegant, professional standard for all symbols, text, spacing, pin layout, and color usage.

---

⭐ Philosophy of Monoline

A schematic must be beautiful, readable, aligned, minimal, and harmonized.
Not a chaotic patchwork of mismatched symbols.

Monoline believes in:

• Zero visual noise
• Zero unnecessary decoration
• Everything aligned on a universal grid
• One consistent style from smallest diode to biggest MCU
• True black-and-white schematics
• Perfect print compatibility
• Universal clarity — any engineer can read it instantly

---

🎯 Goals of the Library

Monoline is built with the following goals:

✔ A universal visual identity

All components share:

• same fonts
• same colors
• same grids
• same corner radiuses
• same symbol architecture

✔ High readability

Pin names, pin groups, and power pins are immediately recognizable.

✔ Schematic-first design

Unlike many libraries that focus on PCB first, Monoline focuses on schematic clarity.

✔ Minimalistic but complete

Simple when possible
→ expressive when needed (functional group boxes, internal icons, etc.)

✔ Ready for A4 print

Every page remains beautiful and readable when printed grayscale.

---

🎨 Color System — STRICT RULES

Monoline uses a legendary ultra-minimal palette:

1) BLACK (primary)

Used for:

• all wires
• all symbols
• all outlines
• all pin lines
• all component text
• all internal icons
• all buses, ports, net labels
• GND symbols

Reason:
Black lines have the highest contrast and remain perfect in printing.

---

2) pure RED (RGB 255,0,0)

Not Altium default red. Must be exact RGB 255,0,0.

Used ONLY for:

• Power ports (VCC, VDD, VREF, +5V, +12V, etc.)
• Power pins of ICs
• Positive supply entry points on blocks

Never used for:

• GND
• Signals
• Labels
• Notes
• Component outlines

Reason:
Power rails must visually pop out with a single glance.

---

3) WHITE interiors

Used for filling internal areas of:

• Rounded-corner IC functional blocks
• Large complex chips
• Internal logic regions
• Sub-blocks of SoCs, PMICs, codecs, etc.

Reason:
White interior improves grouping clarity and helps engineers instantly see logical boundaries.

---

📐 Line Width Rules (Strict)

To keep consistency:

Item	Width
Component outline (normal)	Small
Component outline (big ICs)	Small or Smallest
Internal dividers	Smallest
Rounded boxes	Smallest
Power symbols	Smallest
Generic discrete elements lines	Smallest

Never use medium/thick lines in schematics.

---

📏 Grid, Pin Length & Spacing Rules

These rules apply to library and schematic both:

• Primary grid: 100 mil
• Pin length: 200 mil
• Internal block spacing: 100 mil increments
• Label offsets: multiples of 50–100 mil
• Component snapping: ON
• Pin-to-pin snap: ON

Why 100 mil?
Because:

• It is the industry classic
• It keeps all symbols clean
• It avoids half-grid misalignments
• It prevents sloppy placement
• It prints better

---

🧱 Structural Rules for Symbols

✔ 1) Discrete Components

Items like:

• resistors
• capacitors
• diodes
• LEDs
• Zeners
• BJTs
• MOSFETs
• transformers
• inductors
• crystals
  DO NOT get a rectangle box.

They are drawn as actual symbols only (clean black lines).

---

✔ 2) Simple ICs

• One rectangle
• No icons inside
• Pins around the box
• Name under the symbol
• Power pins grouped (prefer left side or top)
• Pin names always outside

---

✔ 3) Multi-Function / Complex ICs

Such as:

• STM32 / ESP32 / ATmega
• PMICs
• Audio codecs
• Switch-mode drivers
• USB hubs
• CAN/LIN transceivers
• Sensor hubs
• Automotive ECUs

Rules:

• Use white-filled rounded blocks
• Optional functional icons
• Group pins by function
• Place description text inside blocks
• Component name ALWAYS goes under the symbol
• Long names allowed under the block
• Use Arial 10 Bold for main name

---

✔ 4) Functional Block Logic

For large ICs:

• Create blocks for GPIO, power, analog, comms, memory
• Separate left/right logically
• Use internal titles in Arial 8 bold

---

🔠 Font Rules (Mandatory)

Every text in the library and schematic uses:

Use	Font	Size	Style
Designator	Arial	10	Bold
Component Name	Arial	10	Regular
Pin Names	Arial	10	Regular
Parameters	Arial	8–10	Regular
Notes	Arial	8	Regular
Internal block titles	Arial	8	Bold
Small internal labels	Arial	6–8	Regular

NO other fonts.
NO Times New Roman.
NO Segoe.
NO monospace unless required for ASCII art.

---

📄 Altium Recommended Settings

Set these in Preferences → Schematic → Graphical Editing:

• Wire color → Black
• Port color → Black
• Bus color → Black
• Junctions → Black
• Power port color → custom RGB (255,0,0)
• Use “override document font settings” = ON
• Font → Arial Regular
• Grid = 100 mil
• Cursor snap = ON

---

📁 Library Philosophy — Schematic-First

Monoline library focuses on schematic readability.
PCB footprints:

• may be taken from vendor libraries
• or KiCad libs
• or open-source verified sets
• or custom made

The schematic symbol architecture takes priority.

---

🔧 How to Use the Library

1. Download Monoline repository
2. Add Monoline.SchLib to your Altium project
3. Update your global prefs (fonts, colors, grid)
4. Draw schematics using only Monoline symbols
5. Keep your project consistent with Monoline rules
6. Use black wires, black labels, black buses

---

🔍 Visual Harmony Principles

• left-aligned pins = inputs
• right-aligned pins = outputs
• bottom pins = configuration/power/ground
• top pins = reference inputs or power entries
• group similar pins together
• keep repeated block layouts consistent
• avoid mirror-flipped text
• prefer symmetry whenever possible

---

🧩 Multi-Part Symbols

For complex devices:

• GPIO blocks separated
• Analog front-end separated
• Communication interfaces separated
• I²C blocks grouped
• Power management inside dedicated white boxes
• Clear internal functional hierarchy

---

📜 Naming Conventions

• Designators in the schematic ALWAYS in uppercase
• Functional block names in Title Case
• Component names uppercase or PascalCase
• Internal labels short and simple

Examples:

MCU_Core Power_Stage LIN_Interface USB_PHY OSC_Block

---

🖨 Print Fidelity Rules

Monoline is designed for perfect printing:

• Pure black wires print crisp
• No gray artifacts
• Red power pins remain visible even on grayscale printers
• 100 mil grid avoids compression artifacts

---

🧬 Why Monoline Was Created

Because existing libraries are:

• ugly
• unaligned
• impossible to read
• full of mixed symbols and line widths
• polluted with rainbow nets
• inconsistent in pin spacing
• barely printable
• frustrating for teams

Monoline is the cure:
a universal and disciplined visual language for electronics.

---

📚 Wiki Structure

---

---

📜 License

Apache-2.0 license

---

🏁 Final Note

Monoline is more than a library.
It is a professional engineering standard, ensuring every schematic you create is:

• clean
• harmonized
• beautiful
• consistent
• readable
• scalable
• printable
• modern
• and timeless

A schematic is a language —
Monoline makes it elegant.