Mod Detectors bring into play the so-called detectors(sensors) that automatically will be able to give a Redstone signal in certain events. You can build rain sensors, mobs, blocks and liquids. They will be useful in the future, believe me.
How to install Detectors
- Download and install Minecraft Forge
- Download mod
- Do not unzip it, copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods