Receiving data from the infrared receiver

Oct 13, 2025 by leolavanderia.com.br 149 views

Introduction

In today's fast-paced world, tools that facilitate work and save time are becoming increasingly necessary. One such tool is a running text display that can replace the role of banners and conventional advertisements. This system combines electronic circuits, such as digital ICs and microcontrollers, to display text that can be changed at any time through a computer. The purpose of this article is to discuss the design of the infrared receiver and transmitter for the keyboard decoder used on the AT89C2051 microcontroller-based matrix display. This system allows users to control the text displayed on the display directly through the infrared keyboard, without the need to connect to the computer.

The Mechanism of Action of Infrared Keyboard

The infrared keyboard works by emitting the infrared signal to the receiver. This signal is then converted to digital data by the receiver and processed by a microcontroller. The microcontroller then processes the data and sends instructions to the matrix display to display the text that is typed on the keyboard. The infrared keyboard is a wireless input device that uses infrared technology to transmit data from the keyboard to the receiver. The receiver then decodes the infrared signal and sends the data to the microcontroller for processing.

The Role of Microcontroller AT89C2051

Microcontroller AT89C2051 plays an important role in this system. He is responsible for:

Receiving data from the infrared receiver: The microcontroller receives the digital data from the infrared receiver and processes it.
Processing the data received and translates it into instructions for matrix display: The microcontroller processes the data received and translates it into instructions for the matrix display to display the desired text.
Setting the time and sequence of lighting on the matrix display to display the desired text: The microcontroller sets the time and sequence of lighting on the matrix display to display the desired text.

Advantages of This System

This system has several advantages, including:

Ease of use: The user can control the text that is displayed directly without the need to use a computer.
Flexible: The text can be changed at any time according to the user's wishes.
Efficient: This system does not require connections to the computer, so it is more efficient and easy to carry everywhere.
Practical: This system can be used for various purposes, such as displaying information in public spaces, in stores, or at certain events.

Challenges in Design

The process of designing this system has several challenges, such as:

Selecting the right components: Components such as infrared receivers, matrix display, and microcontroller must be carefully selected so that the system works well.
Creating the right program: Microcontroller must be programmed correctly in order to process data from the infrared receiver and control the matrix display correctly.
Eliminating noise: Infrared signal can be affected by noise from the surrounding environment. Therefore, filtering techniques need to be done to ensure the data received is accurate.

Design of Infrared Receiver and Transmitter

The design of the infrared receiver and transmitter is a crucial part of this system. The infrared receiver is responsible for receiving the infrared signal from the keyboard and converting it into digital data. The infrared transmitter is responsible for transmitting the infrared signal from the keyboard to the receiver.

Infrared Receiver Design

The infrared receiver design consists of the following components:

Infrared receiver module: This module is responsible for receiving the infrared signal from the keyboard and converting it into digital data.
Filtering circuit: This circuit is responsible for filtering out noise from the surrounding environment and ensuring that the data received is accurate.
Microcontroller interface: This interface is responsible for connecting the infrared receiver to the microcontroller and sending the digital data to the microcontroller for processing.

Infrared Transmitter Design

The infrared transmitter design consists of the following components:

Infrared transmitter module: This module is responsible for transmitting the infrared signal from the keyboard to the receiver.
Power supply: This is responsible for powering the infrared transmitter module.
Microcontroller interface: This interface is responsible for connecting the infrared transmitter to the microcontroller and sending the digital data to the microcontroller for processing.

Implementation of the System

The implementation of the system involves the following steps:

Designing the infrared receiver and transmitter: The infrared receiver and transmitter are designed using the components mentioned earlier.
Programming the microcontroller: The microcontroller is programmed to process the data received from the infrared receiver and control the matrix display.
Connecting the components: The components are connected to each other to form the complete system.
Testing the system: The system is tested to ensure that it works correctly and efficiently.

Conclusion

The design of the infrared receiver and transmitter for the keyboard decoder on the AT89C2051 microcontroller-based matrix display is a practical and efficient solution for displaying text dynamically without the need to connect to the computer. This system has the potential to be applied in various fields and provides convenience in various activities. The system has several advantages, including ease of use, flexibility, efficiency, and practicality. However, the system also has several challenges, such as selecting the right components, creating the right program, and eliminating noise.

Q: What is the purpose of the infrared receiver and transmitter in this system?

A: The infrared receiver and transmitter are used to transmit data from the keyboard to the microcontroller, which then processes the data and controls the matrix display to display the desired text.

Q: How does the infrared keyboard work?

A: The infrared keyboard works by emitting the infrared signal to the receiver, which then converts the signal into digital data and sends it to the microcontroller for processing.

Q: What is the role of the microcontroller in this system?

A: The microcontroller plays a crucial role in this system by receiving data from the infrared receiver, processing the data, and sending instructions to the matrix display to display the desired text.

Q: What are the advantages of this system?

A: The system has several advantages, including ease of use, flexibility, efficiency, and practicality.

Q: What are the challenges in designing this system?

A: The process of designing this system has several challenges, such as selecting the right components, creating the right program, and eliminating noise.

Q: How do I select the right components for this system?

A: To select the right components, you need to consider the specifications of the system, such as the type of infrared receiver and transmitter, the type of microcontroller, and the type of matrix display.

Q: How do I create the right program for this system?

A: To create the right program, you need to write code that can process the data received from the infrared receiver and control the matrix display to display the desired text.

Q: How do I eliminate noise in this system?

A: To eliminate noise, you need to use filtering techniques, such as using a low-pass filter or a high-pass filter, to ensure that the data received is accurate.

Q: Can this system be used in other applications?

A: Yes, this system can be used in other applications, such as displaying information in public spaces, in stores, or at certain events.

Q: Is this system easy to use?

A: Yes, this system is easy to use, as it allows users to control the text displayed on the display directly through the infrared keyboard.

Q: Is this system flexible?

A: Yes, this system is flexible, as it allows users to change the text displayed on the display at any time.

Q: Is this system efficient?

A: Yes, this system is efficient, as it does not require connections to the computer, making it easy to carry everywhere.

Q: Is this system practical?

A: Yes, this system is practical, as it can be used for various purposes, such as displaying information in public spaces, in stores, or at certain events.

Q: Can I use this system with other types of microcontrollers?

A: Yes, you can use this system with other types of microcontrollers, but you may need to modify the code and the circuit to accommodate the new microcontroller.

Q: Can I use this system with other types of matrix displays?

A: Yes, you can use this system with other types of matrix displays, but you may need to modify the code and the circuit to accommodate the new matrix display.

Q: How do I troubleshoot this system?

A: To troubleshoot this system, you need to check the connections, the code, and the circuit to ensure that everything is working correctly.

Q: Can I get help with designing this system?

A: Yes, you can get help with designing this system by consulting with experts, online resources, or by joining online communities related to electronics and microcontrollers.

Q: Can I use this system for commercial purposes?

A: Yes, you can use this system for commercial purposes, but you may need to obtain the necessary licenses and permissions.

Q: Can I use this system for educational purposes?

A: Yes, you can use this system for educational purposes, such as teaching electronics and microcontrollers to students.

Q: Can I use this system for research purposes?

A: Yes, you can use this system for research purposes, such as studying the behavior of infrared signals and microcontrollers.