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Project Red ExpansionMinecraft mod for 1.21.1

A collection of mods that aim to vastly improved Redstone circuitry with wiring, logic gates, integrated circuits, and more. Heavily inspired by Red Power by Eloraam.

client and servernewest supported 1.21.1TechnologyUtilityEquipmentGame Mechanics
Latest version
4.23.0
Minecraft
1.19.2 to 1.21.1
Java
Java 21+
Loaders
Forge, NeoForge
Licence
MIT
Downloads
21.1k
Updated
2 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Project Red Expansion servers

One click and Project Red Expansion is installed with the right loader, on hardware built for it.

  • 1.21.1
  • Forge
  • NeoForge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Project Red Expansion declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Forge, NeoForge21+declared8 Aug 2024
1.20.4Forge, NeoForge17+declared7 Dec 2023
1.20.1Forge, NeoForge17+declared12 Jun 2023
1.19.2Forge, NeoForge17+declared5 Aug 2022

Download

From Project Red Expansion’s own host. Nothing is re-hosted here.

4.23.0release25 Jul 2026

ProjectRed-1.21.1-4.23.0-expansion.jar · 1.1 MB · for 1.21.1

Download latest
58c8837b516f…
Older versions18
  • 4.23.0-beta+815 Jul 20261.21.11.1 MB250 downloadse697d5e938af…Get
  • 4.22.07 Apr 20261.21.11.1 MB2.7k downloads75b41748a42f…Get
  • 4.22.0-beta+393 Apr 20261.21.11.1 MB114 downloads146d6c2a73be…Get
  • 4.22.0-beta+3731 Mar 20261.21.11.1 MB57 downloads969d61970790…Get
  • 4.22.0-beta+335 Dec 20251.21.11.1 MB1.8k downloads31f935db1906…Get
  • 4.22.0-beta+292 Dec 20251.21.11.1 MB76 downloads6075f8838340…Get
  • 4.22.0-beta+2430 Nov 20251.21.11.1 MB67 downloads3013ed26f862…Get
  • 4.22.0-beta+2129 Nov 20251.21.11.1 MB48 downloads8c68852c4008…Get
  • 4.22.0-beta+1411 Nov 20251.21.11.1 MB482 downloads7d04e24a14fe…Get
  • 4.22.0-alpha+1114 Aug 20251.21.11.1 MB1.1k downloadsf9597691e554…Get
  • 4.22.0-beta+710 Aug 20251.20.41.1 MB71 downloadsadc5033cf8a2…Get
  • 4.21.09 Aug 20251.20.11.1 MB211 downloads2bd9aef814f9…Get
  • 4.21.0-beta+119 Feb 20251.20.41.1 MB96 downloads2dee7fb0f892…Get
  • 4.21.0-alpha+826 Jan 20251.20.41.1 MB94 downloads52f7e51ea3a4…Get
  • 4.19.0-beta+3326 Jan 20251.19.21.1 MB478 downloadsad46364666d0…Get
  • 4.20.1-beta+420 Jan 20251.20.11.1 MB1.3k downloads5054436e1cab…Get
  • 4.20.031 Dec 20241.20.11.1 MB567 downloadsd2946c0ff6c5…Get
  • 4.20.0-beta+1627 Dec 20241.20.11.1 MB82 downloadsacdf11309463…Get

Frequently asked

Does Project Red Expansion work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Project Red Expansion declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Project Red Expansion support?

Everything the author has declared, from 1.19.2 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Project Red Expansion on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Project Red Expansion support?

Forge, NeoForge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Project Red Expansion?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Project Red Expansion under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Project Red Expansion?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Project Red Expansion safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .