dtmf based home appliance using microcontroller
REMOTE CONTROLLING OF HOME APPLIANCES
ABSTRACT
The main aim of conducting this project is to control a maximum of eight electrical appliances by just using a TV remote. Normal IR circuits can switch only one device. But using this circuit, different devices can be controlled using same remote with different switches.
In this circuit, we interfaced 8 devices. These devices are switched using remote keypad -1 to 8. AT89C51 microcontroller is used to control the inputs and outputs. TSOP 1736 (infrared receiver) is used to receive the infrared signals from TV Remote. ULN2803 (High voltage, high current) buffer is used to drive relays. A working system will ultimately be demonstrated to validate the design.
INTRODUCTION TO EMBEDDED SYSTEMS
What is embedded system?
“An embedded system is a system that has software embedded into computer-hardware, which makes a system dedicated for an application (s) or specific part of an application or product or part of a larger system.”
An embedded system is a microcontroller-based, software driven, reliable, real-time control system, autonomous, or human or network interactive, operating on diverse physical variables and in diverse environments and sold into a competitive and cost conscious market.
An embedded system is not a computer system that is used primarily for processing, not a software system on PC or UNIX, not a traditional business or scientific application. High-end embedded & lower end embedded systems. High-end embedded system - Generally 32, 64 Bit Controllers used with OS. Examples Personal Digital Assistant and Mobile phones etc .Lower end embedded systems - Generally 8,16 Bit Controllers used with an minimal operating systems and hardware layout designed for the specific purpose.
System design calls
Embedded system design cycle
“V Diagram”
Characteristics of Embedded
ABSTRACT
The main aim of conducting this project is to control a maximum of eight electrical appliances by just using a TV remote. Normal IR circuits can switch only one device. But using this circuit, different devices can be controlled using same remote with different switches.
In this circuit, we interfaced 8 devices. These devices are switched using remote keypad -1 to 8. AT89C51 microcontroller is used to control the inputs and outputs. TSOP 1736 (infrared receiver) is used to receive the infrared signals from TV Remote. ULN2803 (High voltage, high current) buffer is used to drive relays. A working system will ultimately be demonstrated to validate the design.
INTRODUCTION TO EMBEDDED SYSTEMS
What is embedded system?
“An embedded system is a system that has software embedded into computer-hardware, which makes a system dedicated for an application (s) or specific part of an application or product or part of a larger system.”
An embedded system is a microcontroller-based, software driven, reliable, real-time control system, autonomous, or human or network interactive, operating on diverse physical variables and in diverse environments and sold into a competitive and cost conscious market.
An embedded system is not a computer system that is used primarily for processing, not a software system on PC or UNIX, not a traditional business or scientific application. High-end embedded & lower end embedded systems. High-end embedded system - Generally 32, 64 Bit Controllers used with OS. Examples Personal Digital Assistant and Mobile phones etc .Lower end embedded systems - Generally 8,16 Bit Controllers used with an minimal operating systems and hardware layout designed for the specific purpose.
System design calls
Embedded system design cycle
“V Diagram”
Characteristics of Embedded
Bibliography: 1. The 8051 Micro controller and Embedded Systems - Muhammad Ali Mazidi & Janice Gillispie Mazidi 2. Micro controllers Theory and Applications - Ajay V. Deshmukh 3. www.wikipedia.org 4. www.8051.com 6. www.microcontroller.com