Redstone circuits/Transmission

Repeater/Diode
As of Minecraft Beta version 1.3, a Redstone Repeater block can be crafted from 3 stone, two Redstone torches and one Redstone dust. It can be used to compactly extend the running length of a wire beyond 15 blocks, while applying a configurable delay of between 1 to 4 ticks.

Traditional Repeater/Diode
Using two Redstone torches in series can effectively extend your running wire length past the 15-block limitation. As of 1.0.2 (the July 6th 2010 update), there must be a strip of wire between the two Redstone torches. Repeaters make it possible to send long-distance signals around the map, but in the process, slow down the speed of transfer. To reduce delays, you can stretch out the repeater so that some areas of the wire are consistently in the opposite state, but as long as the number of Redstone torches, or, effectively, NOT Gates is even, the signal will be correct. In more advanced circuits, repeaters can be used as a semi-conductors to isolate inputs or outputs.

Instant Repeaters
Pistons allow for new Redstone interactions including the ability to cutoff and reestablish signals by physically altering the solid blocks in a Redstone circuit.

A block being pushed or pulled will immediately act like glass; ceasing to conduct or to inhibit Redstone signals; This can be used to design devices which have perfect time efficiency.

Two-Way Repeater


This circuit acts as a two-way repeater, essentially serving as an elongated strip of Redstone. Unlike normal repeaters, which only work in one direction, this circuit allows a signal to be sent through it from either side. It does not have a traditional input or output, but rather two spots which serve as both input and output, depending on what is attached to them. Whenever either one of them is receiving power, the other one is also receiving power. Whenever one of them is off, both are off.

Also, this circuit even tells you the direction the signal is flowing. Of the two torches which appear unlit in the diagram, whenever the circuit is powered, one will be lit. It will be the only lit torch in the circuit, and it will face the direction the power is moving. Thus, if there is an input from A, the bottom-right torch will be lit. In short, the primary purpose of this circuit is to simulate the function of Redstone wire without restricting signal direction like a repeater, but it also happens to indicate which direction the signal is flowing.

CodeCrafted has come out with a 4*2*3 2-way repeater.

Bi-Directional Repeater
Using two pistons it is possible to make ultra-fast bi-directional repeaters. When one gets powered, it blocks the other one from activating, thus preventing signal looping which usually happens when using normal repeaters and trying to use the least amount of parts and space.

This kind of repeaters are extremely useful when making busses for CPU and memory systems, because they allow signal transmission from one part to both ends of the bus. There might be some problems though. When turning off the signal it transmits trough the repeater in no time (that is, 0 ticks). So this might set up challenges when making timing systems for a CPU or memory.

Triggered Repeater
A triggered repeater is a repeating circuit that can be triggered on or off (see diagram A). A Triggered Repeater is made with a Lever leading into a vertical Monostable (6 ticks for the underlying repeaters) circuit. This first Monostable circuit is then led into a following Monostable circuit (also with 6 tick repeaters) followed by 3 repeaters, each set with a tick of 2. These 3 repeaters are then led back into the second Monostable circuit, and also into a third Monostable circuit (again with the underlying repeaters at 6 ticks). This third Monostable circuit will then lead into the first Monostable circuit. The lever can then be switched to on, causing the repeaters to repeat a signal in a loop. Once the lever is switched to off, the repeaters will then cease. This is useful for arranging traps that will repeat while a signal is on while the lever activates a separate device, and to have the traps off, while undoing another device. (An example is a draw bridge that will continuously fire arrows will the bridge is open, and cease firing while the bridge is closed.) If the Monostable circuits are not set to 6 each, and the repeating circuit's repeaters are not set to 2 ticks each, the entire circuit will turn off. Dimensions 3 wide, 14 long, and 2 high.

Inverted Triggered Repeater
A Triggered repeater that will only repeat when the input is off (see diagram B, above). This setup is far more compact than a regular Triggered Repeater; it has a width of only 2 blocks, and a length of only 8 blocks, allowing it to fit into shorter and more narrow spaces. However, it's also higher with a height of 3. The setup for this circuit also requires a monostable circuit just like the one used in the regular, however, the on top of the block the second torch is placed, has a repeater with 1 tick, instead of a Redstone wire. After the torch, place 1 wire, followed by a repeater set to 1 tick. (Two ticks also works, however, the circuit could cease functioning sooner). Three wires are then set making a 180 degree turn to either side, the second wire must be one block below the other blocks, with the third wire adjacent to the repeater. The second wire of these three, is the first wire for a second monostable circuit, making it one below the monostable circuit that is adjacent, removing any wires from criss-crossing between the two. This is a regular monostable circuit with only the 6 tick repeaters on the lower level. The end will then flow back to the beginning.


 * NOTE* Inverted Triggered Repeaters WILL cease functioning after several minutes. The exact time is unknown, however, the circuit will continue for an estimated 15–30 minutes. (Not as reliable as Triggered Repeaters)