You can activate powered rails by either powering them with redstone, or using detector rails.
How can you tell if a minecart is empty?
In this design, a minecart will create a pulse when it passes the detector rail. If the minecart is empty, it will get to the turn just as the signal does and be sent back. If the minecart has a rider, it will get to the turn before the signal and be able to continue on.
When does the detector rail deactivate in Minecraft?
A detector rail activates when any minecart is on it (even if only a portion of the minecart is on it), and deactivates when no minecarts are on it. The duration of the signal is always a multiple of 10 redstone ticks (although lag or unloading/reloading a chunk might affect this). While active, a detector rail:
What do activator rails do for a minecart?
Activator rails cause any minecart that runs over them to drop off any player or material that is being transported. Detector rails act as pressure plates, which can be used to create signals and other functions when minecarts pass over them. They can also be used to send a minecart from one detector rail to another.
What happens when you pass over a rail in Minecraft?
When a minecart passes over a detector rail, it will either activate or deactivate any attached redstone. Six iron ingots, one stone pressure plate, and one redstone dust produces six detector rails. Activator rails are quite useful when connected to redstone — if a minecart holding a player passes over, it will drop the player off.
What happens if you run over a detector rail?
If a detector rail is on a slope with a powered rail adjacent to it on flat ground, it will not activate the powered rail when a minecart runs over it. Minecart on a Detector Rail activating the powered rails on either side and a piston. Community content is available under CC-BY-SA unless otherwise noted.