dec: 28 hex: 1C
When any kind of Minecart is on top of the Detector Rail, it will generate a redstone signal. The signal will be transmitted to blocks that are adjacent to the detector (including Powered Rail) and redstone placed under the rail, like pressure plates.
|Ingredients||Input » Output|
|Iron Ingots +
Stone Pressure Plate +
Detector rails can be used for many things. One train station-like feature could be activating a Note Block to indicate that a minecart is approaching, or a note block in conjunction with a redstone torch to have a grade crossing signal. It is easiest to simply wire a series of 4-6 detector rails, one around every 20 blocks, to a note block and an inverter that powers a Redstone Torch. As the cart passes each detector rail, it will trigger the circuit for one flash of the torch and a chime, thus giving you 4-6 chimes before the cart reaches the crossing.
Detector rails can be used with a memory cell to power powered rails for long tracks.
Additionally, they can be used to create a one-way gate to a Powered Rail, with any carts coming the other way slowing down or stopping completely.
They also can be used to activate dispensers filled with arrows to create a minecart-friendly mob trap.
As a defense mechanism in multi-player or for your own challenge, you can make a rectangle using powered rails, regular rails, and detector rails. Then, make a box around it with glass (except the floor). At every detector rail have a redstone wire leading to a dispenser filled with arrows. When you begin the movement of the mine carts they'll pass over the detector, firing the arrows in a constant pattern until you run out of ammo. It is also good for speed killing by filling a hole with mobs and slaughtering the mobs inside; you can get a lot of resources this way.
They can be used for multi-layered piston doors with repeaters and redstone.
When used with compararators, they can detect how full a cart is.
|1.5||Added detector rails.|
|???||Fixed a bug where detector rails couldn't be placed next to any rail or the game would crash.|
|1.6||Fixed a bug with sloped detector rails leading to opposite-sloped rails would only generate a signal for occupied carts (like a stone pressure plate).|
|1.5||13w10a||Added a texture for detector rails when active.|
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