Table of Contents
Introduction:
TV remotes have come a long way since the days when they could only power up the TV, change the channel, and adjust the volume. Depending on the age and complexity of the Remote, TV remotes can act as multimedia control centers.
In today’s modern world, science has made life much more comfortable for mankind. We see the wonders which science has done to our lives every day in our homes, offices, etc. In our project, we plan to add another amenity to our day-to-day life. With our project, we plan to control electronic devices in our household like tube lights, fans, etc. with any normal remote we find in our homes so that we can control the electric types of equipment in our homes with just a press of a button.
A remote works on wireless communication, sending coded bits of information modulated with an infrared signal of a particular frequency. The coded information varies with the button we press. We decoded this information with the help of a microcontroller by giving a Supply from the microcontroller to the particular device with the press of a particular button.
Using remote control for home appliances is a great choice. They can be used to on and off the appliances like TV, AC, DVD player, motors etc with the help of our TV remote. LEDs can be used to on and off.
Block diagram explanation:
Power supply unit
This section needs two voltages viz., +12 V & +5 V, as working voltages. Hence specially designed power supply is constructed to get regulated power supplies.
TV Remote:
A remote control is a component of an electronic device—most commonly a television set, DVD player, or home theater system—originally used for operating the device wirelessly from a short line-of-sight distance. Remote control has continually evolved and advanced over recent years to include Bluetooth connectivity, motion sensor-enabled capabilities, and voice control
Microcontroller:
The Atmel AT89 series is an Intel 8051-compatible family of 8-bit microcontrollers (µCs) manufactured by the Atmel Corporation. Based on the Intel 8051 core, the AT89 series remains very popular as general-purpose microcontrollers, due to their industry standard instruction set, and low unit cost. This allows a great amount of legacy code to be reused without modification in new applications. While considerably less powerful than the newer AT90 series of AVR RISC microcontrollers, new product development has continued with the AT89 series for the aforementioned advantages.
Methodology:
The encoder/decoder parts are to be connected to a transmitter/receiver module which takes care of the transmission of digital signals by radio or infra waves. The communication signal format is designed to be used for radio transmission (it has a constant 50% signal/silence ratio), but it can work with infrared devices as well. The transmitter has a varying number of buttons and sends the states of these inputs to the receiver. The receiver device decodes the message and activates or deactivates the load according to the key pressed in the remote.
Advantages:
- With the attachment of a timer system to these devices, they can be turned on for a fixed duration and then turned off.
- With little modification, this module can be used to control devices like fans which have other features like regulating speed, not only turning on and off.
- Flexible and compact.
Disadvantages:
- One-time investment cost
- IR TX and RX need line of sight distance.
Applications:
- Industries, Schools, Colleges, and Companies.
- With some modification, this project can be used to control the Robots also.
