This addon for Open Computers is designed to add a block that works from Redstone, will be able to prevent spawn mobs in a certain area. By default, this block only works at night, but you can also change this in the config file.
How to install Amulet Stone Mod
- Download and install Minecraft Forge
- Install Open Computers
- Download mod
- Do not unzip it, copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods