Redstone Circuits. A redstone circuit is a structure that can be built to activate or control mechanisms.
Circuits can be designed to act in response to player activation, or to operate autonomously—either on a loop, or in response to non-player activity such as mob movement, item drops, plant growth, etc. The mechanisms that can be controlled by redstone circuits range from simple devices such as automatic doors and light switches, to complex devices such as elevators, automatic farms, or even in-game computers. Understanding how to build and use redstone circuits and the mechanisms they can control will greatly increase the range of things that can be accomplished in Minecraft.
The subject of redstone structures is huge — this article provides only an overview of the many different types of redstone circuits which can be built. Building a Minecraft Computer part 1 - D flip flops and program counters. Minecraft & More. Minecraft Tutorials - E01 How to Survive your First Night (UPDATED!) Minecraft Tutorials - E02 Mining and Smelting Iron (Survive and Thrive II)