RedPower 2 is a great mod done by Eloraam. Its features can take full advantage and enhance the characteristics of Minecraft redstone. It allows to design circuit more complexly which was nearly impossible in vanilla Minecraft.
There are multiple machines having a range of functions like sorting items, breaking blocks, and detecting state changes and being supported by the power of RedPower, called Blutricity.
RedPower 2 Mod Installation:
A configuration file is created at the first launch, so you can use this file to change the block IDs, item IDs, disable click sounds, or use an alternate recipe for crafting red alloy.
RedPower 2 Mod Download:
RedPower Core 2 for Minecraft 1.4.6
RedPower Digital 2 for Minecraft 1.4.6
RedPower Mechanical 2 for Minecraft 1.4.6
RedPower Compat 2 for Minecraft 1.4.6