Well thanks to craftbook you can
EDIT// doesn't work with items that cant stack (THIS EVEN WORKS WITH THE NEW CRAFTING RECIPES)all u need is the following:
A dropper (/rec dropper)
A dispenser (/rec dispenser)
A hopper (/rec hopper)
Some blocks for the placing max 12 (any block will do)
5 redstone
2 chest (/rec chest)
a comparator (/rec comparator)
and a repeator (/rec repeater
O and a sign (/rec sign)
now u need to set up
First off U'll need to put one block and put a sign on it MAKE SURE THE SECOND LINE IS AS FOLLOWS:
Now u'll need to put a dropper ontop of the block with the sign on it and a dispenser across from the sign like so:
Next u'll need to add a chest and hopper to the dispenser as follows:
Now u need to add some redstone to the mix:
Now u must add the comparator and repeater exactly like this:
All u need now is to set up the crafting recipe in the dropper in this case the recipe for hoppers:
Now just put the items in the chest near the dispenser and enjoy as ur items are auto crafted
: 
