Cat feeder, Automatic feederbowl (passive)
thingiverse
I designed this automatic cat feeder, complete with reservoir extension. It's a self filling bowl without the need for electronics or intervention... It is however only suitable for cats that don't eat more than they need. You do need a little bit of supports on the reservoir exit. I printed this on my prusa mini, so any printer can print this size. It took a lot of time to design and prototype this, so if you like it a donation would be very welcome.
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