Schall Virtual Signal

Adds more virtual signals, which can be used for large-scale circuit calculations, map chart tags, station icons and blueprint icons. Currently includes: number signals, colour signals, greek letter signals, mathematical signals, arrow signals, map icon signals. (Locale: English, Deutsch, 正體中文, Português Brasileiro)

2 years ago
0.17 - 1.1
Circuit network
Bob's mods Copyright
4 years ago
Latest Version:
1.1.2 (2 years ago)
Factorio version:
0.17 - 1.1
Downloaded by:
4.38K users


Adds more virtual signals, which can be used for large-scale circuit calculations, map chart tags, station icons and blueprint icons.
Currently includes: number signals, colour signals, greek letter signals, mathematical signals, arrow signals, map icon signals.


Want to use numbers to label map tags and blueprints, but found just 0-9 insufficient for use?
Want more number signals for combinator arithmetics in circuit networks?
Want some more colour signals for blueprint icons or for display on lamps?
Want some arrows for marking directions of blueprints?
Want some extra large icons for marking important area on map view?

Then this mod is for you, which satisfies your above needs!

Virtual signals are not only used in circuit networks, but can also be used in blueprint icons, map chart tags, train station names, chat console, etc. Combined with your creativity, these extra signals are going to improve your gameplay quality a lot!


This mod currently contains seven main components, which can be toggled independently, under "Settings" → "Mod settings" → "Startup" tab:
- Additional number signals
- Additional tertiary colour signals
- Correct naming of magenta signal
- Enable mathematical signals
- Enable arrow signals
- Enable Greek letter signals
- Background Greek letter signals
- Enable map icon signals
- Enable XL signals +1/+2/+3/+4

Number Signals

Vanilla number signals are ranging from 0 to 9 only. This mod allows number signals up to 99! If you think that is too much, you can always choose a limit in between.

Note: In the above screenshot, sorting of vanilla colour signals is done by Schall Lamp Contrast, not by this mod.

Greek Letter Signals

For users with science backgrounds, variables using Greek letter would be more familiar and make more sense (say, using α or θ to denote an angle.) Or in case you want to prevent using real item signals, but ran out of signals to be used in circuit design (e.g., in warehouse monitoring circuit), these extra 24 signals could be a help.

Colour Signals

Vanilla colour signals consist of the three primary colours, three secondary colours, and three grayscale colours only. This mod allows adding the six tertiary colours (e.g., orange, azure, violet), contributing for more colourful uses.

Magenta Signal / "Pink" Signal

The so-called "pink" signal in vanilla game is using RGB code of #FF00FF, which is magenta actually. (The real pink, defined as #FFC0CB, has a much higher green component.) So this mod will correct this by giving back its real name: magenta signal.
This happens to English locale, but similar problems appear in other locale as well. (Because translators are based on the original English text of "pink", rather than based on the real appearance or RGB colour code used...) Other locales provided by this mod also have this text corrected, if they apply.

Mathematical Signals

It is frequent to encounter temporary sum, difference, or other arithmetic values in calculations of circuit signals. Instead of storing them in arbitrary alphabetical signals, this mod has introduced 30 mathematical signals to give better readability to your circuit signals controlling.

Arrow Signals

Sometimes you may want to show some directional information, say, in map chart tags or blueprint icons. This mod has introduced 30 arrow signals: eight for the cardinal and intercardinal directions, two for horizontal and vertical indications, four for rotations, eight for right-angled turns, and eight for paired arrows.

Map Icon Signals

Users of some playstyles (especially in multiplayer games) may want to make their bases more tidy, by assigning some eye-catching symbols on map view (as map chart tags), as quicknotes for future or for other users. Notable uses include marking certain area for exploration, extermination, fortification, deconstruction, warning, etc. Rather than typing text or "borrowing" item icons, this mod has introduced 16 icons for such uses.

XL Signals

Virtual signal icons of all vanilla and (most) modded items have the same standard size. So how can you mark an important location with more emphasis on map view or minimap?
This mod has provided a few extra large sizes (from 4× to 25× area) for you to choose from. The collections include the mathematical, arrow and map icon signals of this mod. Hence you will no longer miss the map chart tags you have previously placed!
Default settings only have tier +2 on only, but free feel to pick any combinations of all four sizes to your taste! The settings are under "Settings" → "Mod settings" → "Startup" tab.

Tier Linear Size Area
+3 16×
+4 25×

These XL signals are all under the new separate group tab. So they are easy to be picked, while not being mixed up with ordinary signals.


This mod do not modify the existing content in the save game. This mod should be safe to be disabled/uninstalled at any time.

Mods Dependencies

  • Schall Lamp Contrast is optional but highly recommended, but it provides options like sorting colour signals to hue order, or black background in lamps to show colours in better clarity.
  • Schall Circuit Scaling is optional but recommended, which allow you to build sub-tile size lamps and circuit components.

Mods Related

  • Schall Map Tag provides a few functions on map chart tags, e.g., alignment to chunks and auto-append position coordinates.

Locale Supported

  • English (en)
  • German / Deutsch (de)
  • Traditional Chinese / 正體中文 (zh-TW)
  • Brazilian Portuguese / Português Brasileiro (pt-BR) by NickFury23

Non-English locale are provided by Schall Language Pack.

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