39

Short answer: If you are trying to filter an item that has a stack size of 16 instead of 64, (like eggs, snowballs, signed books, etc.), then at 10:28 of the video, use 38 redstone dusts instead of 41. This is because eggs emit more signal strength than normal items. Why? The template hopper is programmed to unlock when its signal strength is 3 or greater. ...


26

No, Minecraft is not hardcoding the pulse generator. There is a specific logical progression that makes this circuit make sense. Here are the steps that occur. On the first tick, the player activates the redstone dust. The redstone dust powers both the diamond block and the piston. The repeater realizes that it is now powered through the diamond block, but ...


25

You are experiencing quasi-connectivity. You have actually produced a BUD (Block update detector). The power source is the redstone line above. I have built an example to demonstrate. Here it is unpowered and then powered(but not updated): Here I updated the block by adding glass, then removed glass and power: Here I removed all the remaining blocks ...


22

I know this question is a bit old, but all the other answers seem quite complex to me, while the answer itself can be quite simple: nor gates are universal, redstone torches are nor gates, and all graphs can be embedded in 3-space; so yes, Minecraft is Turing complete!


18

I have invented a solution to this problem using a mechanism to apply one tick of lava damage. It occurred to me that a tripwire could be placed immediately above lava in order to remove it (using a dispenser) as soon as a mob hits it, thus preventing the mob from continuing to swim in it. Doing this for the water as well as the lava means that no ...


17

taken from the Wiki: Flint is only obtainable by mining it yourself or exploding the gravel; making gravel fall onto a non-solid block (e.g. torch, sapling) does not produce flint. The best method I found when trying to farm bunches of flint is a shovel with fortune enchant. I believe fortune 3 gurantees a flint EVERY time. So I would just build a 2x1 or ...


17

The most simple door that a villager cannot go through is an iron door powered by a button. If you need to use levers, you will need to build a simple XOR Gate. Buttons You will need: 1 Iron Door 2 Buttons Put down the iron door and place a button on an adjacent block to the door on both sides. When you press the button the door will open momentarily, ...


17

To augment Slayner's answer, I've made a quick example in Minecraft. The way hoppers work is that they prioritize a hopper below drawing the item down over moving the item along in the direction the hopper is facing. So, in this picture, the items traveling along the hopper chain will be sucked into the one below. Note the middle hopper is not pointing down -...


16

There are a number of methods for extending a redstone signal: Repeaters Just plonk down repeaters. Each one gives you another 15 blocks, however, there is a 1-tick delay in the signal for each repeater you use, which can slow down large circuits. Instant Wire This allows for instantaneous redstone transmission over long distances. There's a wiki page for ...


16

The pressure plate actually powers the block below it, so you can get the signal from below the block where the pressure plate is: There is no need to have any holes on the floor.


16

In 1-tileable redstone either avoid dust like a plague or painstakingly engineer the power levels it emits. There are many techniques for transmitting signal in 1-tileable way, and using the best for your job is pretty important. If you still want the torch cascade, you can exploit the quirk of comparators that they can read container through a block and ...


15

There are different kind of secret triggers in minecraft: Entity movement Living entities like animals and monsters can only move if a player is in a 32 block radius, this radius is a spheroidal box around the cow. By placing the a cow in a place where pistons keep pushing the cow back you can make a proximity detector. This can be seen at: ...


14

You can make your device smaller if you replace the piston with a sticky piston and put it in place of the top torch. Put a block on it and you are done:


14

Yes, redstone lamps work well underwater, but light does not travel as far in water as it does in air; it falls by three levels per block it travels through, instead of one; so you might want more lamps so you don't lose the full light effect.


14

Your friends are right, redstone dust is evil and it should be avoided at all costs when making command block contraptions. Redstone dust does cause lag and it can be unpredictable. There's a nice blog post explaining why this is the case, but suffice it to say that pretty much every expert map maker limits their use of redstone dust to very specific edge ...


13

You don't need one. There's this beautiful command called /weather clear. You can even specify for how long you want the weather to be clear. You can just run /weather clear 999999 each in-game day (employing a simple daylight sensor), and you will have no rain.


12

The longest I can think out of top of my head? Fill the dropper with as many items as many days you want the signal to take. Near each noon the dropper will discard one item, for a max of 576 in-game days. If that's not enough, you can restock the dropper with a chain of hoppers and a double chests, and only when all the items are exhausted the signal will ...


11

You can vastly improve the performance of your times using MATHS. You can see the principle outlined in another answer (this answer deals with redpower timers, but the principle is the same, you just need to do it with your vanilla timers instead). All you need to do is set up multiple timers, like the one you have there, but with coprime numbers of ticks (...


11

Horizontal to horizontal (north to east, etc) Use the same design, but put a redstone torch under the "hotspot" where the blocks will be pushed towards. Horizontal to downward Note that the input can be received from either opposing side (and you can move either the "red power line" or the "white receiver line" if you want to two "inputs" to come at 90 ...


11

In the latest snapshot of 1.8, this has become really easy. Here's a view of the redstone (the piston is sticky): Those furnaces have to be something that can not be pushed by a piston, a furnace is the cheapest, but you can also use obsidian. Top view: Everything covered up:


11

You'll need to use a redstone comparator and probably a repeater as well. A comparator will signal in the same fashion as it does for other non-inventory non-selector blocks; when the command block activates, it will be detectable by the comparator and will only produce a signal strength of redstone equal to the number of successful activations. Most ...


11

Power the block which the torch is attached to. It must be an opaque, solid, full block (so not glass, side of stairs etc; in particular glowstone and sea lanterns also count as transparent). You can power the block by running redstone signal into it (through powered redstone dust or repeater/comparator pointed into it) or by powering the block directly with ...


10

This question appears to be the main attractor for any and all questions involving creating a source of randomness in Minecraft, but most of the solutions are spread over related/duplicate questions. This answer compiles together the information in a single place to provide a more complete solution to the problem. This post is very likely incomplete - Feel ...


10

Use several clocks and an AND gate A clock that takes 7 ticks and one that takes 8 ticks will output every 56 ticks, using only 5 repeaters instead of 15. Using this method you can use 6 repeaters to get a 42s (420 tick) delay. You simply have a clock that takes 3 ticks (1), a clock that takes 4 ticks (+1=2), A clock that takes 5 (+2=4), and a clock that ...


10

This is a very compact solution. The torches on the right are the two outputs.


10

One of the most common ways to make a real random circuit is to create a very fast clock that quickly cycles through the possible outputs, which will stop as soon as a person pushes a button. If the circuit is fast enough, or hidden from them, then the exact moment they stop the circuit is sufficiently random to serve many applications. This can be ...


10

You aren't actually powering the raised block in this instance, because... reasons. That block is receiving power from the torch (and would do something if it were a redstone device), but you're not powering it, which sounds strange and contradictory, but that's the best I can explain it. More critically, you're not transmitting power to the block the ...


10

I built a gigantic complex circuit that converted signal strength to time using comparator fadeout and then back to signal strength using locking repeaters, then I built a simpler circuit based on Xisuma's item frame rotation detector, which was still quite bulky and complicated looking… and then I had an epiphany and just used a bit of redstone dust. This ...


9

Note blocks do just what they say on the tin. When a block has a redstone pulse applied to it, it produces a single tone. Right-clicking on the note block will change the note, up to two different octaves. The block that the note block is placed on top of affects the instrument sound that is produced. Wood-based blocks (including another note block)- Bass ...


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