I am trying to build a mob system where the pistons push the mobs. The screen shot below shows my current design, but I'm thinking there has to be a more space/redstone efficient way to get at this. Or is this as good as it can get?

enter image description here

  • what is the green "25" on your screen? Nov 15, 2012 at 14:56
  • 2
    @ChargingPun Screenshot is from my creative world. the green 25 is the experience level on that world. My kids play a lot on that world and love punching sheep....
    – John
    Nov 15, 2012 at 14:58
  • Ah, I see. I play minecraft on xbox, and we don't have experience... yet. Nov 15, 2012 at 15:13

2 Answers 2


You can make your device smaller if you replace the piston with a sticky piston and put it in place of the top torch.

Put a block on it and you are done:

  • Let's see, that's almost half the redstone, and volume of device is 4 instead of 9? SWEET!
    – John
    Nov 15, 2012 at 14:59
  • john you do need a slimeball for each piston though (not that hard if you have found a slime chunk) Nov 15, 2012 at 15:13
  • ratchet freak Not a problem for me, I have a slime farm. My biggest issue with my design was the space required. This design is super compact on space usage. Very nice.
    – John
    Nov 15, 2012 at 17:41

As ratchet freak said, you can cut the redstone use by adding a block.

Also, by alternating repeaters and single bits of redstone dust, you can cut your redstone usage by 1 per unit on average:

Finally, if you are pushing 3 block tall mobs rather than 2 block tall mobs, you can use an even more efficient system using tripwires shown here:

This increases the iron requirement per cell to 2 but cuts the redstone down to only one.

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