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Automatic Fish Feeder | Simple Arduino Project

Made by Leviathan_engineer / Home Automation

About the project

Using a Arduino uno, a RTC module, and servo we can create a device that automatically releases fish food at a specific time everyday

Project info

Difficulty: Easy

Platforms: Arduino

Estimated time: 1 hour

License: GNU General Public License, version 3 or later (GPL3+)

Items used in this project

Hardware components

	Arduino Uno - R3	x 1
	RTC Module	x 1
	Micro Servo	x 1
	Tiny Breadboard	x 1

Software apps and online services

Arduino IDE

Story

https://youtu.be/Rt7CBueGZH4?si=4Dip3MERdhkkMyvZ

We create a simple device that releases some fish food at a specific time everyday, I've created a step by step process on my yt channel

Code

Code for fish feeder

#include <Wire.h>
#include <RTClib.h>
#include <Servo.h>

RTC_DS1307 rtc;
Servo fishFeederServo;

const int servoPin = 9;
const int feedHour = 8;    // Hour to trigger feeding (24-hour format)
const int feedMinute = 30; // Minute to trigger feeding
const int feedSecond = 0;  // Second to trigger feeding
bool hasFed = false;

void setup() {
  Serial.begin(9600);
  while (!Serial);

  Wire.begin();
  
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }
  
  // Adjust RTC time to 8:29:30 AM
  rtc.adjust(DateTime(2024, 7, 3, 8, 29, 30));  // Adjust RTC to July 3rd, 2024, 8:29:30 AM
  
  fishFeederServo.attach(servoPin);
  fishFeederServo.write(0); // Set servo to 0 degrees (closed position)
  delay(500); // Allow time for servo to reach position
}

void loop() {
  DateTime now = rtc.now();
  Serial.print("Current Time: ");
  Serial.print(now.hour());
  Serial.print(":");
  Serial.print(now.minute());
  Serial.print(":");
  Serial.println(now.second());
  
  // Check if it's time to feed the fish
  if (now.hour() == feedHour && now.minute() == feedMinute && now.second() == feedSecond && !hasFed) {
    Serial.println("Feeding Fish...");
    feedFish();  // Call the fish feeding function
    hasFed = true;
  }

  // Reset flag after feeding time has passed
  if (now.hour() == feedHour && now.minute() == feedMinute && now.second() == (feedSecond + 1)) {
    hasFed = false;
  }

  delay(1000);  // Print every second
}

void feedFish() {
  fishFeederServo.write(90);  // Rotate servo to 90 degrees to dispense food
  delay(1000);  // Wait for 1 second
  fishFeederServo.write(0);   // Rotate servo back to 0 degrees (closed position)
}

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Automatic Fish Feeder | Simple Arduino Project

About the project

Project info