When a stackable item is put in a hopper, a comparator will send a weak signal. When a non-stackable item is put in a hopper, a comparator will send a strong signal. At least, for vanilla items. This doesn't work for custom items because minecraft always considers them non-stackable.
When a stackable item is put in a hopper, a comparator will send a weak signal. When a non-stackable item is put in a hopper, a comparator will send a strong signal. At least, for vanilla items. This doesn't work for custom items because minecraft always considers them non-stackable.
Solving this will probably not be easy...