Fun with Redstone

[Mr. Analog]

So today I built a pretty cool vault, I ended up having to harness the power of YouTube and learnt a few things:

Redstone Piston T-Flipflop:
http://youtu.be/LzYkd6KbkC8

Vertical Signal Transmission:
http://youtu.be/A2-SwoM5RgA

And the really cool part, a mightily compact 3x3 vault door!
Super Compact 3x3 Piston Door:
http://youtu.be/fOPGlU2M29U

I linked the videos above as there are SO MANY awful videos out there and many of them don't go into the detail I was looking for but these vids are all great and hopefully inspire you to build something cool

Oh and if you DO want to check out what I built today make your way to the Vault building basement

http://mc.tomasu.org/#/557/64/-74/max/0/0

[Thorin]

Looks pretty darn cool!  I ended up watching a bunch more videos after that first one that were quite helpful.

..

Sand and gravel should be renewable by grinding stone into gravel, gravel into sand.