IoT Cat Feeder

mayuri

Published April 06, 2022

109 UCC

57 VAR

Original source (new tab)

Components

Hardware components

Arduino - Arduino Ethernet Shield

x 1

Arduino Mega 2650

x 1

Nema23 Stepper

x 1

TMC2208 Stepper Motor Driver

x 1

230VAC to 12VDC power supply

x 1

PLA Filament black

x 1

PLA Filament natural

x 1

LM2596 DC bis DC Buck Converter

x 1

1kg load cell and HX711

x 1

Project description

This build is based on the great design of Thomas Krichbaumer (thingiverse.com/thing:3623148) I made some changes to the bowl support (to use a glass bowl), the case, and the lid. It's an automated cat feeder for dry food. The load cell (HX711) below the bowl constantly reports how much food is left. When it's feeding time the build-in Arduino gets a trigger signal from my smart-home (via ModbusTCP) and the bowl gets refilled if needed. The dosing process itself is controlled by the Arduino. The auger is driven by a Nema23 stepper motor which is controlled by a TMC2208 driver.