Identify two embedded systems that are sold on the market today and analyze their interfaces.
Automatic Washing Machines:-
STRUCTURE:-(Sensors and actuators)
- Level sensors
- Motor
- Display and keypad to input information
Just add clothes and leave it to the machine. Rest operations are done by your machine itself.
Once you load clothes in machine, the whole process consists of three cycles. Washing, rinsing and spinning.
During washing and rinsing cycle, water is added to the drum by pipes.
Closing and opening of valves for adding water is checked through level sensors by micro controller like PIC micro controller. Then the rotation of drum starts for pre-set time. After that water is drained out through pipes. During spinning cycle, water is not added and drum rotates for a set time.All the processes are controlled by micro controller program
Automated Teller Machine (ATM):-
A computerized device used in banking shopping mall where without goint to bank a person can access and perform his transaction (transaction like billing with-draw money)
STRUCTURE:-
- A key-pad so the user can enter his commands and password.
- A screen displays information. A printer prints the receipts and cash is received from cash dispenser.
- A network is present between the bank computer and ATM machine through a host computer.
- All these input and output operations are carried with the help of microcontroller.
Describe all inputs to each system and outputs from each system.
WASHING MACHINE
INPUT:-
- KEYPAD THAT SET TIME FOR WASHING RINSE AND SPINNING WATER LEVEL
- CLOSED DOOR
- DIRTY CLOTHES
- DETERGENT
OUTPUT:-
- WASHED CLOTHES
- A BEEP SOUND
- DRAINING THE DIRTY SOAPY WATER
DISPLAY SCREEN IS I/O
ATM
INPUT:-
- CARD READER
- KEYPAD
OUTPUT:-
- SPEAKER
- CASH
- RECEIPT PRINTER
DISPLAY SCREEN IS I/O
Classify the inputs and outputs based on their mode of interaction:
- Visual: INFORMATION WE (LAPTOP SCREEN) LED
- Audio: CALLING (SKYPE WHATS APP)
- Tactile: TOUCH SCREEN OR PADS
- Electronic: WACHING MACHINE ELECTRICITY
