Minecraft Java 1.21 Mods
Browse 9 free mods for Minecraft Java 1.21 — popular picks include Electromechanics, Redstone Helper, Create: Enhanced Iron Processing.
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Electromechanics
An addition to the existing Redstone ecosystem mechanically and electrically
Redstone Helper
Mod which must you to help with redstone!
Create: Enhanced Iron Processing
This is a datapack that adds a custom mixing recipe to produce crimsite renewably to enhance your iron and redstone farms.
Laseredstone
Redstone but we use lasers to transfer signals

Redstone Scrambler
Adds a throwable redstone EMP item to the game!
SerialCraft
Bring Redstone to life! A simple mod to connect Arduino and Minecraft via serial port. No complications, just plug and play.
Hot Redstone Wires
Wires get hot! Makes redstone dust and blocks painful to step on.
Beyond The Simulation
Grow a Lab Grown Brain that Connects Redstone Beyond the Distances, Dimensions, Worlds, Servers and Realities? (yes, connect redstone to real life)
Wireless Control
A Minecraft datapack that allows linking redstone consumers remotely