Nice design but instead of the repeater delays why not use a delay gate?
For clarity. I was just illustrating how to wire a RS latch with a delay system to produce the desired effect. I'm sure he's smart enough to figure out how to splice in a better delay block when he gets to that point.
Man it's gonna be great when those delay/inverter blocks are implemented.
What I don't understand from your circuit there, is why an edge trigger is necessary if you're using a button. Is there any reason why a regular 1 second button pulse going through the delay line wouldn't be able to reset the latch, but a shorter pulser signal would? Doesn't make sense to me unless you were using something other than a button to send the signal.
I guess he didn't specify the input type, so you may need the edge trigger if it's something like a switch or floor plate that doesn't already have a short timed pulse.
Yeah, you're right. It's not really needed here. An earlier, less elegant, circuit needed an edge trigger to resolve a race condition. It's an artefact from before I simplified it.
Never mind the edge trigger. I don't know what I was thinkin. Musta been a race condition in ma brain...
1) The cobblestone block (upper left) has a button. It sends a signal to the RS latch (two sand bocks to the right) which opens the door when the loop immediately flips to its other stable state. (note the last inverter before the door)
2) The button also sends a signal to the left through the long chain of inverters (netherack). This delay chain only yields about two seconds (not much longer then the button!). You will need many more.
3) When the signal travels all the way through the delay chain it hits the edge trigger (gravel, lower right). The edge trigger is the secret to making it work. When its input goes HIGH it creates a brief flicker on the output.
4) The output of the edge trigger (sometimes called pulse generator) injects a HIGH signal to the door-half of the RS latch and flips the loop back to the original state, closing the door.
Make the delay chain as long as you need.
*the edge trigger is kinda hard to see. It's the lower left section of the D-flipflop design B on the wiki, with and extra inverter on the end.
You can make something with a large number if very lethal hidden traps. You might also be able to make something fairly defensible. But a smart and careful person can sap their way into anything (especially when you're not around).
The only way they can't get in is if they can't find it. If you are worried about people stealing you stuff, suggest making a hidden entrance in the side of a dirt cliff. Dig the dirt out and then put them back behind you. Have a vertical shaft with ladders down to your base on the bedrock. Always sneak when nearing the surface and check for anyone else around before emerging.
if you build a grand, attention grabbing structure that you claim no one can get into, griefers will take it as a challenge...
I approve. But I don't see Notch doing anything like that; both because it's probably over his head and because it isn't really the Minecraft style.
Analysing the system and producing a static graph can be problematic when there can be internal astable feedback loops. Graphing a ALU is one thing. But it won't be long before some yahoo uses the XORed results of a 5-clock and 7-clock to produce quasirandom behaviour when the user generates an input. How the hell you gonna graph that?
The current cellular automata system (think: Game of Life) is okay, I suppose. This was intended for door locks and TNT detonations, not computers. But it needs to be cleaned up a bit. The cardinal direction wonkyness is unacceptable.
I would do the simulation by building a netlist of wires and NOR gates that are evaluated on a strict system-wide clock ticks (again, think: Game of Life). I think the Redstone is currently event driven. The timing should be more precise and predictable, especially after the recent addition of Note Blocks.
Bring some dirt to a far away desert biome. After you strip mine all the sand you will be left with contoured stone. Pave that with the dirt, do a little landscaping around the edges, and maybe plant a few trees.
The fact is that sand is only found at or near the surface. Collecting it will require disrupting the land. If you don't like the scarring, the only thing you can do is try to clean up the damage.
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For clarity. I was just illustrating how to wire a RS latch with a delay system to produce the desired effect. I'm sure he's smart enough to figure out how to splice in a better delay block when he gets to that point.
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Yeah, you're right. It's not really needed here. An earlier, less elegant, circuit needed an edge trigger to resolve a race condition. It's an artefact from before I simplified it.
Never mind the edge trigger. I don't know what I was thinkin. Musta been a race condition in ma brain...
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1) The cobblestone block (upper left) has a button. It sends a signal to the RS latch (two sand bocks to the right) which opens the door when the loop immediately flips to its other stable state. (note the last inverter before the door)
2) The button also sends a signal to the left through the long chain of inverters (netherack). This delay chain only yields about two seconds (not much longer then the button!). You will need many more.
3) When the signal travels all the way through the delay chain it hits the edge trigger (gravel, lower right). The edge trigger is the secret to making it work. When its input goes HIGH it creates a brief flicker on the output.
4) The output of the edge trigger (sometimes called pulse generator) injects a HIGH signal to the door-half of the RS latch and flips the loop back to the original state, closing the door.
Make the delay chain as long as you need.
*the edge trigger is kinda hard to see. It's the lower left section of the D-flipflop design B on the wiki, with and extra inverter on the end.
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You can make something with a large number if very lethal hidden traps. You might also be able to make something fairly defensible. But a smart and careful person can sap their way into anything (especially when you're not around).
The only way they can't get in is if they can't find it. If you are worried about people stealing you stuff, suggest making a hidden entrance in the side of a dirt cliff. Dig the dirt out and then put them back behind you. Have a vertical shaft with ladders down to your base on the bedrock. Always sneak when nearing the surface and check for anyone else around before emerging.
if you build a grand, attention grabbing structure that you claim no one can get into, griefers will take it as a challenge...
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It's possible that there is a single tile somewhere in your house that is not as well lit is you think.
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Analysing the system and producing a static graph can be problematic when there can be internal astable feedback loops. Graphing a ALU is one thing. But it won't be long before some yahoo uses the XORed results of a 5-clock and 7-clock to produce quasirandom behaviour when the user generates an input. How the hell you gonna graph that?
The current cellular automata system (think: Game of Life) is okay, I suppose. This was intended for door locks and TNT detonations, not computers. But it needs to be cleaned up a bit. The cardinal direction wonkyness is unacceptable.
I would do the simulation by building a netlist of wires and NOR gates that are evaluated on a strict system-wide clock ticks (again, think: Game of Life). I think the Redstone is currently event driven. The timing should be more precise and predictable, especially after the recent addition of Note Blocks.
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2. Prototyping with Dirt
3. sometimes Drawing some or all of it on Graph Paper (I always have a pad on a clipboard near me. Used for a lot more then MC).
4. and then Repeated Renovation until it's perfect
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This really shouldn't be to too hard to solve.
http://en.wikipedia.org/wiki/Terminal_velocity
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And because spiders are two blocks wide, you don't need to build a solid sheet of it.
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The fact is that sand is only found at or near the surface. Collecting it will require disrupting the land. If you don't like the scarring, the only thing you can do is try to clean up the damage.
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Ahem:
Also goes boom if you whack it.
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http://www.minecraftforum.net/viewtopic.php?f=1&t=141285
About 3/4 of the way down.
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I'm only half joking.