Apologies if this is known, but I haven't seen it before.
I've seen several suggestions in the past about ways to construct traps which are harder to disarm. One recurring complaint is that traps aren't triggered when someone removes a pressure plate. This got me thinking about a way to do it, and I have succeeded.
This is the part visible to the player. The floor is made of glass to show the wiring, normally this would be a solid block (preferably of the same material as the pressure plate to hide its presence). Whenever the player steps on the pressure plate, the signal will become high and trigger our trap.
This is the actual wiring involved to make it work. On the right we have a clock. This clock is repeatedly toggling the state of the wire on top of the log. Because of the presence of the pressure plate, this signal bends towards the birch log preventing the sand block next to the left repeater from being powered. Take note of the stair block above the wire. Translucent blocks such as e.g. stairs and glass don't cut the redstone wire when connected diagonally as shown below (side view):
where = redstone wire. Using a regular solid block here would not connect these wires.
By removing the pressure plate the wire reroutes directly to the sand block. Putting a stable true signal on this wire will not work as it won't update properly, therefore we utilize the clock. Now that the sand block is powered, the repeater propagates the signal which joins up with the regular output of the pressure plate.
When removing the pressure plate, the output signal will alternate between true and false. If this is unwanted, simply hook it up to an RS-nor latch.
Hope this is of use.
[edit]In case it wasn't obvious, by not joining the two output signals you can have different actions based upon if the pressure plate was stepped upon or removed.[/edit]
[edit2]This circuit can also be used to detect pressure plate placement.[/edit2]
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Support the Allocator! Find my inventions such as my pressure plate removal detector on the About Me page of my profile.
I'm still looking for more feedback on my configurable Redstone Gate mod. All gates and common circuits (such as e.g. clocks, edge detectors, latches and Flip-Flops) in a single block.
nice, a less effective way would be to put signs on top of the pressure plates, sand on top of that, and then a redstone torch/wire on top of that
if you break the pressure plate, the sign breaks, sand falls, redstone breaks, triggering whatever it is :biggrin.gif:
edit: forgot to ask, but why do you need a clock? wouldn't a redstone torch work just as well?
edit: forgot to ask, but why do you need a clock? wouldn't a redstone torch work just as well?
That was my initial though as well, however it doesn't update properly.
I assume that redstone signals are only evaluated once something changes (the rerouting of the wire is apparently just changing how things are rendered).
Since you do not want to manually replace the torch, I attached a clock instead to force re-evaluation of the signal itself.
[edit]In the original design I actually had just the torch attached to the wire and later attached the clock to fix it, hence it's peculiar double torch design. This would be the more direct way to construct it:
Unfortunately, these types of clocks aren't very robust and break when chunks are unloaded, so a regular 5-clock will work better.[/edit]
Rollback Post to RevisionRollBack
Support the Allocator! Find my inventions such as my pressure plate removal detector on the About Me page of my profile.
I'm still looking for more feedback on my configurable Redstone Gate mod. All gates and common circuits (such as e.g. clocks, edge detectors, latches and Flip-Flops) in a single block.
But what are you using to edit your .pngs? Please stop using it. They're at least 6 times the size they should be.
Hmmm. Now that you mention it, they are kinda big. They are just (unedited) screenshots from Minecraft.
They are fine on my HD. Does Imageshack do this?
[edit]Apparently, yes. Should be fixed now. Thanks for the warning.[/edit]
Rollback Post to RevisionRollBack
Support the Allocator! Find my inventions such as my pressure plate removal detector on the About Me page of my profile.
I'm still looking for more feedback on my configurable Redstone Gate mod. All gates and common circuits (such as e.g. clocks, edge detectors, latches and Flip-Flops) in a single block.
Very cool, but wouldn't it have been easier to just attach a redstone torch on the back of the wood block, invert the signal, and run both that and the output from the pressure plate through an or gate? I do like your design though for the creative innovation and compactness of it.
Minecraft is kind of like walking into a high-class auction with top security and a solid reputation only to find out that everyone else in the room is a mugger. Who explodes.
Very cool, but wouldn't it have been easier to just attach a redstone torch on the back of the wood block, invert the signal, and run both that and the output from the pressure plate through an or gate? I do like your design though for the creative innovation and compactness of it.
Removing a pressure plate and not pressing it both yield a False signal (i.e off). So no, that wouldn't work as we want to distinguish between these two.
Rollback Post to RevisionRollBack
Support the Allocator! Find my inventions such as my pressure plate removal detector on the About Me page of my profile.
I'm still looking for more feedback on my configurable Redstone Gate mod. All gates and common circuits (such as e.g. clocks, edge detectors, latches and Flip-Flops) in a single block.
I just realized my mistake, I was thinking that the pressure plate would be depressed when someone tried to destroy it, and they would be forced to destroy the block under it, but upon thinking about it I realize that is not the case.
Minecraft is kind of like walking into a high-class auction with top security and a solid reputation only to find out that everyone else in the room is a mugger. Who explodes.
Brilliant! I was always discouraged from building pressure plate triggered traps because they were so simply circumvented, but now they are DOOM! DOOOOOOM!!
Just out of curiosity, and maybe I just don't see the big picture - what's stopping someone from breaking the block(s) next to the pressure plate and destroying the redstone underneath?
Nice. Thats clever.
When you posed the problem, my thought was to have a piston set up such that the pressure pad is preventing it from moving, but upon removal the piston can push into the gap. This movement of blocks could be detected to trigger whatever you want to.
But this is much more elegant.
Support the Allocator! Find my inventions such as my pressure plate removal detector on the About Me page of my profile.
I'm still looking for more feedback on my configurable Redstone Gate mod. All gates and common circuits (such as e.g. clocks, edge detectors, latches and Flip-Flops) in a single block.
I've seen several suggestions in the past about ways to construct traps which are harder to disarm. One recurring complaint is that traps aren't triggered when someone removes a pressure plate. This got me thinking about a way to do it, and I have succeeded.
This is the part visible to the player. The floor is made of glass to show the wiring, normally this would be a solid block (preferably of the same material as the pressure plate to hide its presence). Whenever the player steps on the pressure plate, the signal will become high and trigger our trap.
This is the actual wiring involved to make it work. On the right we have a clock. This clock is repeatedly toggling the state of the wire on top of the log. Because of the presence of the pressure plate, this signal bends towards the birch log preventing the sand block next to the left repeater from being powered. Take note of the stair block above the wire. Translucent blocks such as e.g. stairs and glass don't cut the redstone wire when connected diagonally as shown below (side view):
where
By removing the pressure plate the wire reroutes directly to the sand block. Putting a stable true signal on this wire will not work as it won't update properly, therefore we utilize the clock. Now that the sand block is powered, the repeater propagates the signal which joins up with the regular output of the pressure plate.
When removing the pressure plate, the output signal will alternate between true and false. If this is unwanted, simply hook it up to an RS-nor latch.
Hope this is of use.
[edit]In case it wasn't obvious, by not joining the two output signals you can have different actions based upon if the pressure plate was stepped upon or removed.[/edit]
[edit2]This circuit can also be used to detect pressure plate placement.[/edit2]
I'm still looking for more feedback on my configurable Redstone Gate mod. All gates and common circuits (such as e.g. clocks, edge detectors, latches and Flip-Flops) in a single block.
The Sun rises in the North!Now these points of data make a beautiful line...
if you break the pressure plate, the sign breaks, sand falls, redstone breaks, triggering whatever it is :biggrin.gif:
edit: forgot to ask, but why do you need a clock? wouldn't a redstone torch work just as well?
That was my initial though as well, however it doesn't update properly.
I assume that redstone signals are only evaluated once something changes (the rerouting of the wire is apparently just changing how things are rendered).
Since you do not want to manually replace the torch, I attached a clock instead to force re-evaluation of the signal itself.
[edit]In the original design I actually had just the torch attached to the wire and later attached the clock to fix it, hence it's peculiar double torch design. This would be the more direct way to construct it:
Unfortunately, these types of clocks aren't very robust and break when chunks are unloaded, so a regular 5-clock will work better.[/edit]
I'm still looking for more feedback on my configurable Redstone Gate mod. All gates and common circuits (such as e.g. clocks, edge detectors, latches and Flip-Flops) in a single block.
...But what are you using to edit your .pngs? Please stop using it. They're at least 6 times the size they should be.
Hmmm. Now that you mention it, they are kinda big. They are just (unedited) screenshots from Minecraft.
They are fine on my HD. Does Imageshack do this?
[edit]Apparently, yes. Should be fixed now. Thanks for the warning.[/edit]
I'm still looking for more feedback on my configurable Redstone Gate mod. All gates and common circuits (such as e.g. clocks, edge detectors, latches and Flip-Flops) in a single block.
Removing a pressure plate and not pressing it both yield a False signal (i.e off). So no, that wouldn't work as we want to distinguish between these two.
I'm still looking for more feedback on my configurable Redstone Gate mod. All gates and common circuits (such as e.g. clocks, edge detectors, latches and Flip-Flops) in a single block.
no one can enter my smp house now!
http://www.minecraft...crafters-guild/
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Curse PremiumWhen you posed the problem, my thought was to have a piston set up such that the pressure pad is preventing it from moving, but upon removal the piston can push into the gap. This movement of blocks could be detected to trigger whatever you want to.
But this is much more elegant.
Still seems to work for me. Is there something that breaks?
I'm still looking for more feedback on my configurable Redstone Gate mod. All gates and common circuits (such as e.g. clocks, edge detectors, latches and Flip-Flops) in a single block.