Description
Detector Rail is crafted from six iron ingots, one stone pressure plate, and one redstone dust, producing six signal-ready track sections. It behaves like ordinary track for movement, but when any minecart sits on top, it emits redstone power to adjacent blocks, dust, comparators, and repeaters. The signal ends as soon as the cart leaves.
This makes the block a compact sensor for railway logic. A station can detect an arriving passenger cart and open doors, trigger a note sound, start a powered rail, or switch a junction. Item systems use it to count carts and synchronize unloaders. With command-free vanilla mechanics, it is one of the cleanest ways to let a moving vehicle communicate with a fixed redstone circuit.