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.
download the files on: https://www.thingiverse.com/thing:2539750 2 Hp Paddle Wheel Aerator
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