EMBEDDED

1. Embedded System Design
Presentation by

2. Introduction
 Embedded System –
 An electronic/electro-mechanical
system which is designed to perform a
specific function and is a combination
of hardware and software.

3. Examples of Embedded
Systems
1) Consumer Electronics :- Cell phones,
digital camera, video games,
calculators, pagers.
2) Home appliances :- Washing machine,
microwave oven, home security
system, lighting systems.
3) Office Automation :- Fax machine,
printer, scanner.
4) Business Equipment :- alarm systems,
card readers.
5) Automobiles :- Fuel injection, antilock
brakes.

4. Washing machine

5. Modes of Washing Machine
 Washing machine comes with two modes –
 Top-load machine &
 Front-load machine
First phase of washing :-
• In top-load, the machine twists back & forth and pulls the cloths down to the
bottom of the tub. On reaching the bottom of the tub the cloths work their
way up to the top of where the agitator grabs them again & repeats the
mechanism
• In front-load machine, the cloths are tumbled & plunged into the water over &
over again
Second Phase of washing :-
• The water is pumped out from the tub & the inner tub uses centrifugal force
to wring out more water from cloths by spinning at several hundred rotations
per minute(RPM). This is called “Spin Phase”.
• The inner tub of the machine consists of the no. of holes & during the spin
cycle, it forces the water out through the outer tub holes.

6. Diagram of Top-Load
Washing Machine Parts
Figure 1:- Top-load machine

7. Diagram of Front-Load
Washing Machine Parts
Figure 2:- Front-load machine

8. Working of Washing Machine
 Embedded system contains- sensors, actuators, control
unit, user-interface like keypad, display unit.
 The actuator part of the washing machine consists of
motorised agitator, tumble tub, water drawing pump &
inlet-valve to control the flow of water.
 The sensor part consists of water Temp. sensor, level
sensor etc.
 The controller part contains microprocessor/controller
based board which interfaces with sensors & actuators.
 The sensor data is fed-back to the controller unit& the
control unit generates the necessary actuator output.
 The control unit provides connectivity to user interfaces
like Keypad for setting Washing time, selecting the type
of material to be washed.

9. THANK YOU