Minecraft: Tripwire-based location sensor
0Here's something fun. Ever since tripwire was added I figured it could be used as a precise 2D location sensor. Now here it is. It turns out you can make a tripwire grid by placing two layers on top of each other, one for each axis (although the graphics suggest one layer will do, that is not the case). It detects tall entities not unlike a keyboard matrix detecting key presses. It should be as useful an input device for your redstone contraptions and computers as it is simple and compact.
This one is only 4x4, but it readily scales to the tripwire limit. The wiring would be a majestic mess, though, so you should use RedPower if you'd like to keep your sanity.
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