I am playing an MCPE hermit chunk map. There is 1x 16x16 chunk for me to work with, and so far no access to the nether. I have limited supplies, so the cheaper the better. Also, since I do not currently have access to the nether, comparators are out.

I have a mob grinder with a 2x2 hole down the middle. The mobs fall down this hole onto half slabs, die, and their items are collected by hoppers underneath the slabs. I am trying to find a way to visually tell when mobs fall through. I can either find a way to detect them falling in the hole, or their items being picked up. Either would be fine with me.

I would prefer to have a redstone lamp light up because I feel this is the easiest to see form a distance. I am currently on MCPE 14.2 (Windows 10 version, but basically same thing in this case)

I apologize if this has been asked, but I did a bit of searching before posting.

  • You don't light a redstone block. – haykam May 19 '16 at 21:00
  • Yes @Peanut, I realized when I read your response that I meant a redstone lamp. I will edit my text. – Justin May 22 '16 at 1:54

If you can't use comparators there's no way to detect when the hopper picks up an item.

What I'd recommend doing is placing a tripwire inside the hole, so it triggers when the mobs fall through it. Then you can simply hook it up to anything you like.

Here's an example:1]


To detect if an item has been collected by a hopper, you can simply place a comparator adjacent to it, with the two-torch side touching the hopper. enter image description here

The repeater then amplifies the signal so it does not matter how many items are in the hopper. Once we add an item...

enter image description here

We now know that there is an item in the hopper.

  • Note: You can also attach hoppers to chests and double chests so there is more space in the container. – haykam May 19 '16 at 21:02

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