WEBVTT 00:00.000 --> 00:04.000 Have you ever wondered how your TV remote sends signals to your TV? 00:04.000 --> 00:10.000 Every button on a remote sends a unique digital code, but how can we know what that code is? 00:10.000 --> 00:20.000 In this activity, we're going to learn how to find the unique code of each button on an IR remote using Arduino and an IR receiver. 00:21.000 --> 00:28.000 The first and most important component of our project is the Arduino Uno. It is the brain of our project. 00:28.000 --> 00:34.000 It receives signals from the IR receiver and displays the unique codes on the serial monitor. 00:39.000 --> 00:43.000 Our next components are the IR remote and IR receiver. 00:43.000 --> 00:48.000 The remote sends commands to change modes, control movement and adjust speed. 00:48.000 --> 00:56.000 While the receiver captures these signals for the robot to follow, and finally, jumper wires to connect everything together. 00:56.000 --> 01:01.000 First, let's understand core components used in our activity. 01:01.000 --> 01:04.000 Arduino Uno is the brain of our project. 01:04.000 --> 01:10.000 The Arduino receives signals from the IR receiver module whenever a button on the remote is pressed. 01:10.000 --> 01:19.000 It then converts these signals into digital data, which is displayed on the serial monitor in the Arduino IDE on your computer. 01:19.000 --> 01:23.000 This allows us to see the unique code of each button in real time. 01:23.000 --> 01:30.000 Technically, the Arduino Uno is a development board based on the AT-MEGA-328P microcontroller. 01:30.000 --> 01:44.000 It includes digital and analog eye-opens, a USB port for programming, a voltage regulator for stable 5 voltage power, a crystal oscillator for timing, and a reset button. 01:44.000 --> 01:51.000 It runs C and C++ code and controls sensors and motors in real time. 01:51.000 --> 01:58.000 An IR receiver module and IR remote work together to enable wireless control of the robot. 01:58.000 --> 02:03.000 The remote uses an IR LED to send coded infrared light. 02:03.000 --> 02:10.000 The receiver, with its photo diode sensor, detects infrared light and converts them into electrical signals. 02:10.000 --> 02:14.000 Each button on the remote has a unique signal pattern. 02:14.000 --> 02:19.000 The Arduino reads these unique signals and carries out the command accordingly. 02:20.000 --> 02:27.000 IR remotes are used to control televisions, allowing users to change channels and adjust volume easily. 02:27.000 --> 02:33.000 They help operate air conditioners and fans to set temperature and modes without moving. 02:33.000 --> 02:38.000 IR remotes are also used in robots and toy cars for wireless control. 02:38.000 --> 02:45.000 They are even used to operate cameras remotely, making photography easier and more convenient. 02:45.000 --> 02:50.000 Now let us understand the circuit connections for our IR remote button code project. 02:50.000 --> 02:53.000 Collect all the required components. 02:53.000 --> 02:58.000 First, connect the IR receiver to the Arduino using jumper wires. 02:58.000 --> 03:04.000 Attach VCC to the 5V pin, GND to a GND pin on the Arduino. 03:04.000 --> 03:09.000 This allows the receiver to function properly and sends signals to the Arduino. 03:09.000 --> 03:14.000 Then, make sure the outpin is connected to Digital Pin 11 on the Arduino. 03:14.000 --> 03:21.000 This pin will receive the signals from the IR remote and send them to the Arduino for processing. 03:21.000 --> 03:26.000 Refer to the circuit diagram to ensure all connections are correct. 03:26.000 --> 03:31.000 Let's program and test the IR remote button code project. 03:31.000 --> 03:37.000 First, connect the Arduino Uno to your laptop using a USB cable. This allows you to upload the code. 03:37.000 --> 03:41.000 Open the Arduino IDE on your computer. 03:41.000 --> 03:46.000 Go to File, open and select your IR remote button config code. 03:46.000 --> 03:49.000 Next, open Tools, then Library Manager. 03:49.000 --> 03:53.000 Search for the IR remote library and install it. 03:53.000 --> 03:59.000 Then, under Tools, select Board and choose Arduino Uno. 03:59.000 --> 04:06.000 After that, go to Tools, Port, and select the correct COM port for your device. 04:06.000 --> 04:11.000 Now, click the Verify button to check the code for any errors. 04:11.000 --> 04:17.000 Once it's verified, click the Upload button to send the code to your Arduino Uno. 04:17.000 --> 04:24.000 After a few seconds, you'll see Done Uploading at the bottom of the screen, confirming a successful upload. 04:24.000 --> 04:29.000 After uploading, open the serial monitor from Tools or the top right button. 04:29.000 --> 04:35.000 Set the BOD rate to 9600 to view the data correctly. 04:35.000 --> 04:43.000 With this, our programming is complete, and our IR remote button code project is now ready to perform. 04:43.000 --> 04:48.000 Now, let us test the IR remote button code project. 04:48.000 --> 04:54.000 Point the IR remote directly at the IR receiver module and press any button on the remote. 04:54.000 --> 04:59.000 Watch the serial monitor in the Arduino IDE on your computer. 04:59.000 --> 05:04.000 You will see a unique hexadecimal code appear for each button you press. 05:04.000 --> 05:09.000 Each button sends a different signal, and the Arduino converts the signal into a readable code. 05:09.000 --> 05:18.000 This allows you to identify which code corresponds to which button, so you can use it later to control LEDs, motors, or other devices in your projects. 05:18.000 --> 05:23.000 Make sure the remote is within range and facing the receiver for accurate detection. 05:23.000 --> 05:33.000 With that, your IR remote is ready, and you can use the recorded codes to control LEDs, motors, or other parts of your Arduino project. 05:33.000 --> 05:38.000 Now, let us test the IR remote button code.