User:Munin295/Transmission circuit

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Repeaters
To "repeat" a signal means to boost it back up to full strength.

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Analog lines
The simplest analog line is a line of redstone comparators. However, like repeaters, comparators can draw a signal from an opaque block and push a signal into an opaque block, thus it is usually more efficient (in resources, and in signal delay) to place comparators every four blocks:

The analog signal in this line can be reduced or suppressed at some point along its length by feeding another signal into one of the comparators in subtraction mode. The signal can be overridden by feeding a stronger signal into one of the opaque blocks.

Because the redstone dust is not adjacent to any power or transmission components, only opaque blocks, it will not configure itself to point in any particular direction. This will cause the dust to also power any opaque blocks or mechanism components to the side of the analog line. Transmission components (redstone dust, redstone comparators, etc.) should not be placed adjacent to the line's dust because that would cause the dust to configure itself in a way where it doesn't power the rest of the analog line.

Vertical Transmission
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Dust staircases
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Dust ladders
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Torch towers
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Piston towers
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Diodes
Another important aspect of signal transmission is making sure the signal doesn't go the wrong way. "Diodes" are redstone components or circuits which allow signals to propagate in one direction but not the other.

Diode components
Both the redstone repeater and the redstone comparator behave as diodes. …

Diode circuits
Glowstone and upside-down slabs (along with components less frequently used in diode circuits, such as upside-down stairs and hoppers) have the property that redstone dust on top of them can propagate signals diagonally upwards, but not diagonally downwards: