Remote Controlled Pet Feeder

With this simple Arduino project you can feed your pet using a remote control. All you need is an Arduino Uno board (or similar), a plastic bottle, a servo motor (doesn't have to be very powerful), a TV remote, IR receiver (TS0P1738) and a small piece of cardboard.

Let's get started!

Installing the IR Library:

The very first thing that we need to do associating with arduino is to download the IR library.

Download IR library from below link and install it: https://github.com/z3t0/Arduino-IRremote

If you don't know how to install a library follow below link: https://www.arduino.cc/en/guide/libraries

Decoding IR Signals:

First you need to connect the parts as per the given circuit diagram:

You can checkout Pin out of TSOP1738 below:

Use following code to decode IR remote:

/*
The IR sensor's pins are attached to Arduino as so:
Pin 1 to Vout (pin 11 on Arduino)
Pin 2 to GND
Pin 3 to Vcc (+5v from Arduino)
*/
#include <IRremote.h>
int IRpin = 11;
IRrecv irrecv(IRpin);
decode_results results;
void setup()
{
 Serial.begin(9600);
 irrecv.enableIRIn(); // Start the receiver
}
void loop() 
{
 if (irrecv.decode(&results)) 
   {
     Serial.println(results.value, DEC); // Print the Serial 'results.value'
     irrecv.resume();   // Receive the next value
   }
}

• Open Arduino IDE and Upload code

• Open Serial Monitor

• Aim your remote at the sensor and press each button

• You can see different numbers for each button

Consider any two buttons, and note down decoded values.In my case I have chosen Power button and Mode button.

I got the following values:

• Power button=33441975

• Mode button =33446055

We will be using this two values to control rotation of servo motor.you need to add this two values in the program which is given on next step:

Let's set-up the final hardware!

The Final Circuit!

• Connect the servo's signal pin to pin#9 on the arduino

• connect the servo's VCC and GND pins to 5V VCC and GND on the arduino

• The servo will be glued to one end of the plastic bottle, and rotate a piece of cardboard small enough to close the opening of the bottle so that the food is blocked.

• If all the hardware set-up is connected properly, you can simply compile and upload the following sketch to the board.

#include <IRremote.h>
#include <Servo.h>
int IRpin = 11;  // pin for the IR sensor
IRrecv irrecv(IRpin);
decode_results results;
Servo myservo;
void setup()
{
 Serial.begin(9600);
 irrecv.enableIRIn(); // Start the receiver
 myservo.attach(9);  // attaches the servo on pin 9 to the servo object
}
void loop() 
{
 if (irrecv.decode(&results)) 
   {
     irrecv.resume();   // Receive the next value
   }
  if (results.value == 33441975)  // change according to your IR remote button number
    {
      myservo.write(0);
      delay(15);
    }
    if (results.value == 33446055)  // change according  to your IR remote button number
    {
      myservo.write(30);
    delay(15);
    }
}     

Now you can control your opening of pet feeder dispenser with remote control by this simple project. :-)

Happy making!