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)
}

Shop

Project Hub

Video

Blog

Shop home

3D printing

Single Board Computers

Development kits

Sensors

Internet of things

Robotics

Accessories

Product of the Week

Electromaker Educator

The Electromaker Show

The Electromaker Podcast

Automatic Fish Feeder | Simple Arduino Project

About the project

Project info