The Bridge.

Well, I've built a bridge, and it took me close too 5 hours over two days too figure the dang thing out.. but i think it's ready too be shared. so, here's the screencaps of each part. Please keep in mind this is my own design, I didn't follow any tutorials, aside from the guidence at minecraftwiki for the XOR Gate.

The first is the bridge, retracted, killing a zombie

Second, The XOR gate that allows me too have the two switches.






The bridge, extended.










The line of repeaters for the outer-switch, mainly for fun.











Extended, In daylight.












The pistons and torches that actually work the bridge, extended.












And again, retracted.










The initial bridge, retracted, this is the first design, which i changed, because it was UGLY. And I needed too add a second switch.