2. Classifications.
3. Application's.
4. Case Study of Microwave, Traffic light, Washing machine.
Embedded system is a combination of computer Hard ware, soft ware and Real time opprating system ( RTOS).
➡It may perform with in a large system.
➡System can be programable or have a fixed functionality.
➡The perpose of Embedded system is to control is a specific function with in a device.
➡ It perform Repeatedly function.
EXAMPLE:- Washing machine, Computer, Micro wave, Mobile phone.
Classifications of Embedded System.
 |
Sensor:- Sensor helps measure the physical quentity and convert into electrical signal.
➡ The electrical signal can ready to observe by any electronic instrument and them signal goes to A-D converter.
A-D converter:- (Analog to Digital converter)
➡ It converter the analog signal serial by the signal and convert it to digital signal.
➡ It Encode the data.
Memory:- It is used for store informantion.
RAM = Random Access Memory
ROM = Read Only Memory
Processer:- It perform the control operation ( control Unit)
➡ In processer execution of data is done at the end and store in memory and signal are forward to the D-A converter.
➡ It perform the various types of operation (ALU).
Digital to Analog Converter:-
➡ It decode the data.
➡ It convert the digital signal to analog signal.
Actuator:-
➡ The control signal comes from the processor it provide the desire output.
Application of Embedded system.
➡ Home Appliances.
➡ Office Automation.
➡ Security.
➡ Telecommunication.
➡ Instrumentation.
➡ Banking and Finance.
➡ Auto mobile Industry.
⋆ Case study of Microwave with Embedded system .
A typical example of such as embedded system is in you microwave oven. The microwave often has a display key board and a number of a sensor and actuactors . sensor the detects whether the door is closed.
 |
| Block Diagram of Microwave |
⋆ Case study of Traffic light with embedded system.
A development of an intelligent traffic signal control (ITSC) system needs because present traffic light controller such as (AT89C51). Which has very less internal memory and no inbuilt ADC.
The present traffic system have fixed time internal for green and red signal which does not provide the flexibility to the system the (ITSC) system will able to traffic light system.
1. Detection of traffic volume by using genetic algarithum.
2. Emergence vehicle detection such as Ambulance, Police etc by using wireless sensors network (IR). Embedded at the signal intersection.
 |
| Block Diagram of Traffic Light signal |
⋆ Case study of Washing machine with embedded system.
Embedded system in a washing machine for example would include closing and opening of valves to let water through onto casses are controller by microcontroller.
