The "Logic" part of Redpower introduces a variety of integrated Redstone circuits into Minecraft. Those circuits provide lots of different functions which can be used in conjunction with other mods like Industrial Craft and Buildcraft in order to create things like automatic farms, combination locks, light shows, item dispensers and much, much more.
All Redpower circuits require a selection of basic parts to construct. Once you have these, you can construct all the circuits below.
The Wafer is the most basic part, and is made by smelting smooth stone in a furnace. Each smooth stone that is smelted will generate two wafers. Stone Wafers can be created in all smelting machines, including the Alloy Furnace but not the Blulectric Alloy Furnace.
A Stone Wire is basically Redstone baked into a Stone Wafer, providing a conductive path between points in the same circuit.
A Stone Anode acts as a receiver for red rays from nearby cathodes, becoming energized when powered by a cathode.
A Stone Cathode acts as an inverter, beaming red rays to nearby anodes on the same substrate.
A Small Motor allows a pointer to spin, providing the core for many more complex timing functions.
Right-clicking a (Redpower) machine block with the screwdriver will rotate the block without the need to mine and place it again. The block cycles through all 6 possible orientations. This will work on RedPower2 logic gates and machines as well as on vanilla pistons, repeaters and dispensers.
The Sequencer alternates between supplying a Redstone signal to each of four sides in sequence at a user-specified speed (right click to change). Since it is synchronized to world time, it also makes a handy clock - simply set it to 300 seconds.
The Timer sends out a pulse at a user-specified time interval (right click to change). The Timer sends out a Redstone pulse to its front, left and right. It can be stopped by powering it from its back, left, or right.
RS NOR latch. Will always continually power one output. Turning on the opposite output causes it to change state. Turning on both inputs burns it out.
The output is on when all inputs are off. Can be clicked to disable some inputs.
The output is on when any input is on. Can be clicked to disable some inputs.
The output is off when all inputs are on. Can be clicked to disable some inputs.
The output is on when all inputs are on. Can be clicked to disable some inputs.
The output is on when the two inputs match.
The output is on when only one of the inputs is on.
All three outputs are on when the input is off.
Emits a short pulse when the input turns on. The pulse is sent instantaneously, which also makes it useful as a fast repeater, and because the pulse is so short, placing two back to back allows pulses to be sent in both directions. Useful for creating contraptions such as Minecart Dispensers.
Known as 'T Flip Flop' in Vanilla. Changes state when the input turns on. Can also be clicked to change state manually.
All three outputs are on when the input is on.
The center input selects which side input controls the output. Also useful to build a D-FlipFlop with some wire.
Counts up by Increment for each pulse on one input, and down by Decrement for each pulse on the other. Clicking opens a GUI to allow the maximum count, increment, and decrement to be set. Each output is on when the pointer reaches the end of range in that direction.
An upgraded form of the Vanilla repeater that takes full advantage of RedPower. In addition, it supports 9 different time constants: 1, 2, 3, 4, 8, 16, 32, 64, or 128 ticks.
Working on the same principles as a stone anode, a red alloy plate assembly is capable of converting red rays into Redstone current. The difference is that a plate assembly is capable of vertical signal transmission.
A Null Cell performs no logic functions at all; it serves merely as a point for one red alloy wire to cross over another, without one interfering with the other.
An Invert Cell acts as two crossing red alloy wires, with a built-in invert function. When the lower wire is unpowered, the upper wire is powered. When the lower wire receives power, the upper wire returns to its previous state.
A Non-Invert Cell acts as two crossing red alloy wires with a built-in Buffer function. When one wire in the cell is powered, the other wire is powered as well.