How to make an armoured zombie filter?
Here is an Armour Filter Farm example:
- Here is the main redstone mechanism composed of tripwire, wire, redstone repeaters with delay level 4 and a sticky piston attached to a slime block, that pushes the burning zombies out of the fire.
- This is the spawning platform, which must let zombies pass only through the hole.
- This is the push-down-into-fire mechanism, that uses tripwire for powering and a villager "helper" to attract zombies into it.
- This is how the mechanism looks from above.
- Here is the villager "helper" that attracts zombies.
- This is the Zombie that burns and is about to be pushed out of fire by a slime block into a hole.
- This Zombie was unarmoured, so he died while on fire because the water didn't had time to extinguish him.
- This is the extinguishing system, that uses water to extinguish zombies with an armour level of at least 3 out of 20. The water is blocked by a piston while there is no entity inside the trap. It uses tripwire, linked by wire to a Redstone Torch (NOT Gate) that reverses redstone signal ("powered" becomes "unpowered" and "unpowered" becomes "powered") linked to the piston by wire. Also, the rotten flesh doesn't go to a waste; instead it is collected by hoppers and sent into a chest.
- Now another zombie that unlike the other, has a Diamond Helmet, burns in the hole… …but unlike the other, he didn't die and the water saved him in time!
So this farm is effective for zombies wearing at least a diamond helmet.
Note that it may not work on baby zombies and, also, multiple zombies "using" it may corrupt the mechanism, so you can add walls at the spawner or a redstone mechanism that allows a single zombie to pass in a certain number of seconds, for example