After a little trial and error I have managed to create a working ender pearl stasis chamber, that can keep a pearl bouncing on slimeblocks for a very long (possibly infinite) time. I designed it myself, however the idea is certainly not mine. Seeing as it is so simple I would be surprised if this doesn't appear on youtube at some point.
Here are a couple of ender pearls in stasis. They will remain there until the teleporter is triggered.
So what use is this device then? It can teleport you from anywhere in the overworld or nether back to spawn. Its range is unlimited. This means you could drop a pearl or 3 into the chamber, go exploring and be summoned back to spawn immediatly. At the moment an operator is required to use the teleport, someone at spawn who can press the button to teleport you in. Also, as ender pearls cannot pull you between dimentions nether usage of this system is more complicated. This is explained later in more detail.
The following screenshot shows the controls for one of the four cores where people may keep pearls. There are 4 so multiple people can use it at once. The other 3 have the same controls.
I will explain what each control does.
The lever on the side, labeled "Core 1 On/Off" turns the chamber on and off. While on, the piston moves up and down rapidly. In this state a pearl can be suspended.
The button labeled "Overworld Teleport" will stop the bouncing momentarily meaning the pearl will break and the person who threw it will be teleported to the core. If the person was in the nether when this is pressed the pearls will break and nothing will happen.
The button labeled "Nether Teleport" will activate a pusher that (hopefully) bounces the pearl sideways out of containment and into the nether portal. This portal is a one way link to the centre of the nether hub, so the pearl will end up there. This will teleport the person who threw the pearl from anywhere in the nether to the centre of the nether hub. If pressed while the person is in the overworld they will not teleport and the pearls will break.
Proper Usage
The person who wishes to be teleported to the machine later will go to the building and turn on an empty core. They will then proceed to the roof where the pearls are inserted into the cores. They will go to the core they turned on and throw a pearl straight down (this is important) into the water. They may then leave the building and go away. When they wish to be teleported, they will ask nicely (bribe) someone close to spawn to operate the controls for them. This person will head to the building and into the control room on the first floor. If the person to be teleported is in the overworld they must press the "overworld teleport" button on the core that the person threw the pearl into. If they are in the nether, hit "nether teleport".
Limitations
The biggest problem is that ender pearls dissapear when the person who threw them logs out. As there is no pearl, the person cannot be teleported at all.
Ender pearls do not work between dimentions. However, moving the pearl to the nether via a portal is a valid method, and what this machine does.
Slime blocks are expensive. Ony 2 of the 4 cores are able to be used for nether transport as I did not have enough slime blocks. This will be rectified shortly.
The way the pearls are moved to the nether is not ideal, they can impact the pusher instead of bouncing off it. To counter this problem, put in multiple pearls if planning a nether teleport. Only one needs to get through.
You have to visit the building to use it, and it can only teleport you back there. It cannot teleport you anywhere else.
Where to find this facility
The building is located at spawn behind the horse race track next to the community farm.
It looks like this:
I will post a close look at the design here if requested.
Enjoy! Not only Zedwick who can make teleporters now!
