As explained on Getting Traits. This machine is the easy route if you want to fill up your trait containers.
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Place a trait container that has the <Needs More Data> tag in the slot, provide energy to the machine and it will slowly fill up the damage bar until it completely disappears. That's when your container is done.


Comparators will emit a redstone signal correspondent to the damage of the trait.

In other words... the more damaged the trait is, the weaker the redstone signal will be (therefore it will be at its peak when the trait is done).