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I have a couple different types and pretty much like them all. The ones made by Hydor are pretty good, but honestly, THESE are the best ones I found. They are really flexible in their programming options. The only downside to them is that they are a tad flimsy. I also haveTHESE round/wheel kind of things that have no flexibility at all. They just rotate twice in a day and deliver food.
At any rate, not knowing your setup, I would say that you should be able to arrange it so the food drops through the hole.