Automatic Pet Feeder using Arduino

The Automatic Pet Feeder system is orchestrated by an Arduino microcontroller that coordinates timekeeping, user input, visual feedback, and mechanical actuation. At the heart of the timing system is the DS3231 Real-Time Clock (RTC) module, which communicates with the Arduino to maintain accurate time tracking. Users interact with the system via a 4*4 matrix keypad and a push button, allowing them to input and configure specific feeding schedules. Visual feedback, including current time, system status, and scheduled feeding intervals, is displayed to the user in real-time on a 16*2 LCD screen. When the current time matches a programmed feeding schedule, the Arduino triggers a pulse-width modulation (PWM) signal to drive a servo motor. This servo motor is mechanically coupled to a mechanism inside the 3D-printed pet feeder container, opening a chute or gate to dispense a precise portion of food. The entire circuit is prototyped on a breadboard using connecting wires, with current-limiting resistors utilized where necessary to protect components like the push button and LCD display. Power and control signals are routed cleanly across the breadboard to ensure reliable, automated operation of the mechanical feeder.