Turn A Chip Dip Tray Into A Cheerful Bird Feeder Potato chips aren't the best food to feed your birds, but that shouldn't stop you from using a cheap chip dip tray to make a bird feeder they're sure ...

Still, Arduinos are cheap (we just picked up some tiny Pro’s for about $3) and it is a more flexible arrangement than, say, a 555 driving the servo. We have seen many cat feeders over the years.