Building a DIY arduino/raspberry pi/beaglebone black smart cat feeder for less than $15, we will need: - 2 cans - MG996 servo motor - zip ties - thick wire - double bowl - piece of styrofoam - electric tape - arduino or similar microcontroller/microcomputer with PWM support - something to cut tin with (knife/scissors/dremel).
Also it can be a great cat puzzle if you approach it creatively! My cat pushes the button (https://www.youtube.com/watch?v=7DwUOdvJp-8) and also gets the food from the interactive stream donations (https://www.youtube.com/watch?v=6V7L9D9fyVA)
Example arduino code: https://gist.github.com/ulitiy/5c319f65c419dfa1af7ca2dcdebab3ce
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