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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: