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Editing 40d:Pressure plate
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− | + | '''Pressure plates''' work somewhat like [[lever]]s, but instead of being actively toggled, they're activated by the weight of something on them. | |
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Pressure plates are not configured during use, but upon placement. While placing a pressure plate, you can configure it to trigger when the following things are on it: | Pressure plates are not configured during use, but upon placement. While placing a pressure plate, you can configure it to trigger when the following things are on it: | ||
− | + | * [[Water]]/[[Magma]] - choose minimum and maximum levels | |
− | + | * [[Creatures]] - choose minimum and maximum [[size]]; creatures of the size selected will be listed as example. You can pick whether your own citizens will trigger the plate or not. | |
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− | + | Pressure plates default to toggleable, where they send an On signal when the determined weight is upon them and send an Off signal when it's released. Pressing {{k|o}} will change them to one-use mode, where upon being activated, they do their work then deconstruct themselves, ceasing to operate altogether. | |
− | + | Pressure plates can be linked to all the same objects levers can. The effects are listed in the [[Lever]] page. | |
− | + | A toggleable [[trap]] may prove useless when there is a large amount of invaders walking back and forth over it, as there will not be enough time for it to activate before it is switched again. Berserk dwarves will set off pressure plates. | |
== Permanent Effect Pressure Plate System == | == Permanent Effect Pressure Plate System == | ||
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It is possible to hook a toggleable pressure plate up to a device which makes its effect permanent until a lever is flipped. One way to do that is to build a water-sensing pressure plate in a 1x1 room, link that to your [[trap]] (a drawbridge, for example), build a hatch above it, link the hatch to the original pressure plate outside, and then put water on the hatch. When an enemy steps on the pressure plate, the hatch opens, the water falls onto the other pressure plate (water-sensing pressure plate), and it raises the drawbridge. | It is possible to hook a toggleable pressure plate up to a device which makes its effect permanent until a lever is flipped. One way to do that is to build a water-sensing pressure plate in a 1x1 room, link that to your [[trap]] (a drawbridge, for example), build a hatch above it, link the hatch to the original pressure plate outside, and then put water on the hatch. When an enemy steps on the pressure plate, the hatch opens, the water falls onto the other pressure plate (water-sensing pressure plate), and it raises the drawbridge. | ||
− | To make it resettable, you can use [[pump | + | To make it resettable, you can use [[pump]]s controlled by a lever or by [[dwarf]]-power to move the water back to where it started. You can also build a flood-gate next to the water-sensing pressure plate (linked to a trigger obviously) and have the water flow and spread-out into a room where it can evaporate, however, water in a 1x1 tile will not require a lot of room to evaporate. |
− | You can use this pressure plate system as an inverted trigger system. In | + | You can use this pressure plate system as an inverted trigger system. In otherwords, a lever that controls the permanent-effect pressure plate system can be flipped from ''off'' to ''on'' and subsequently trigger a trap or mechanism from ''on'' to ''off'' as a result, and vice versa. It depends on the water level settings used for the water-sensing pressure plate: |
* '''3 to 7''' - Normal, on is on and off is off | * '''3 to 7''' - Normal, on is on and off is off | ||
* '''0 to 2''' - Inverted, subsequent state is opposite the main trigger | * '''0 to 2''' - Inverted, subsequent state is opposite the main trigger | ||
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For this example, say we want to close a [[floodgate]] when a reservoir reaches a depth of 5. | For this example, say we want to close a [[floodgate]] when a reservoir reaches a depth of 5. | ||
− | * Build the pressure plate, set to activate under water ({{key|w}}) from 0 ({{key|a}}, {{key|s}}) to 4 ({{Key|z}}, {{key|x}}). Make sure it is set to reset ({{key|o}}) (The default is to | + | * Build the pressure plate, set to activate under water ({{key|w}}) from 0 ({{key|a}}, {{key|s}}) to 4 ({{Key|z}}, {{key|x}}). Make sure it is set to reset ({{key|o}}) (The default is auto-reset and does not need to be changed{{version|0.28.181.40d}}, you'll know it's set because the screen will read 'Resets'). |
* Place the floodgate | * Place the floodgate | ||
* Connect a lever to the floodgate, and open it. | * Connect a lever to the floodgate, and open it. | ||
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The floodgate should close a few seconds after the water reaches a depth of 5 or more, and open again when the depth falls to 4 or less. | The floodgate should close a few seconds after the water reaches a depth of 5 or more, and open again when the depth falls to 4 or less. | ||
− | It's worth noting that the reaction time of the pressure plate-floodgate system is quite large - the reservoir may overflow before the floodgate shuts. In order to prevent this (for example, when building a [[well]] filled from a [[river]] or brook), build a run-off pool. This allows the gate enough time to close, and the water will spread out instead of overflowing as it would have in a smaller pool. | + | It's worth noting that the reaction time of the pressure plate-floodgate system is quite large - the reservoir may overflow before the floodgate shuts. In order to prevent this (for example, when building a [[well]] filled from a [[river]] or brook), build a large run-off pool. This allows the gate enough time to close, and the water will instead continue to spread out instead of overflowing, as it would have in a smaller pool. |
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{{Buildings}} | {{Buildings}} | ||
− | + | [[Category:Traps]] |