Automatic Fish Feeder

This is an automatic fish feeder controlled by an Arduino. I tried several of the other automatic fish feeders listed online, and didn't have much luck, so I designed my own. It's designed to feed small food pellets, such as the Top Fin Betta Bits shown in the photos. The feeder arm contains a circular hole that is moved past the feeder bowl to meter out a small amount of food per actuation. If your fish need more (or less) simply change the code to update the feed interval. I'd recommend running a few cycles over a piece of paper to see if the mechanism feeds reliably for your chosen food, and to get the amount per feed cycle correct.

The "arm rev1" dispenses about 0.15 cm^3 of fish food per dose. I added another optional part, the "arm 6mm rev1" which dispenses about have of this, about 0.08 cm^3 per dose. I am trying some new ultra-fine ground guppy food, and it seems to work better to do a smaller dose, 2x per day. (which would require a slight tweak to the code as well)

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