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Step 3: Making the mechanics

Put 2 powered rails then 1 detector rail for the length of the defence system, next, put 1 powered rail at each end with a block behond it
    (this makes the cart go back and forth).

Then, put redstone wire down to the despensers (each powers 3)

Put a redstone torch down for each 2 powered rails.


Step 5: Other ideas

Another thing you can do is place it in a giant square and put castle walls on top of it.
Then, make a circular track with the same functions.

Smaller model shown below.
Just use a repeater
9mvp93 years ago
Mind if i try to improve?
scistone (author)  9mvp93 years ago
on mine or on your own?
9mvp9 scistone3 years ago
On yours, i just take the general idea and try to make it even better.
scistone (author)  9mvp93 years ago
can you copy it and do it?
9mvp9 scistone3 years ago
scistone (author)  9mvp93 years ago
Thanks, just put me in it
9mvp93 years ago
I never thought of using a CART mech. LOL Nice job
scistone (author)  9mvp93 years ago
Thanks, what else can you use anyway?
9mvp9 scistone3 years ago
Erm, something simple like a REDSTONE BUTTON. LOL
scistone (author)  9mvp93 years ago
Well, yea, I thought you ment infinant. Cause a redstone torch won't work.
9mvp9 scistone3 years ago
What about the machine gun tactic, the repeater! just do the torch+repeater mechanisim

what about burning the torch out? you could only get a few shots in before the torch burned out. I've tested different pulsers and a 5-clock is the fastest one that doesn't burn out.
scistone (author)  16skittles3 years ago
It can burn out!?!?
scistone (author)  9mvp93 years ago

Yea, cool
dude never would've thought of this this is epic! :-)
scistone (author)  place name here-3 years ago
Thanks (see single cannon)

I will probobly put my minecraft awesome things on an instructable.