Have you wanted to automate feeding your small family of shrimp? But find automatic fish feeders dump way too much food every day, polluting the water?

HI JOSH HERE AGAIN WITH THE AUTOMATIC PELLET FEEDER FOR SHRIMP

FEED YOUR SHRIMP UP TO 32 TIMES WITH JUST A SINGLE PELLET AT A TIME

FITS ON ANY 3.6MM RIMLESS AQUARIUM

SOME ASSEMBLY REQUIRED

Parts

• Printed Automatic Pellet Feeder for Shrimp: base, carousel and optional lid
• Arduino with 4 free digital output pins and 5v
• Elegoo 28BYJ-48 ULN2003 5V Stepper Motor + ULN2003 Driver Board or equivalent
• 2x M3 screws (2.3mm head height)
• 2x M3 nuts
• 1x boba tea (extra large) straw, optional

Hardware

1. Bolt the stepper motor to the base using the M3 parts, screw facing up
2. Pressure-fit carousel onto stepper motor shaft
3. Optionally superglue the straw to the dispenser chute to guide sinking food down
4. Wire the Arduino to the stepper motor & controller board as seen in Thing photo

Firmware

1. Open the attached .ino sketch file in Arduino IDE
2. In Arduino IDE: Sketch -> Include Library -> Manage Libraries.... Then search and install accelstepper (currently 1.59.0)
3. Customize parameters like rotation interval, reservoirs per interval
4. Upload sketch file to program the Arduino

Feed my shrimp already

1. Hand align a carousel reservoir with the dispenser chute
2. Fill every other carousel reservoir with desired dose of food
   • on power up/reset, the feeder will rotate once so you know it is working
3. Power Arduino and stepper motor assembly (5v USB or power supply)
4. Go on vacation
5. Shrimp get fed