This document introduces control technology concepts like input, process, and output using examples like washing machines. It defines flowcharts as diagrams that represent sets of instructions using standard symbols. It provides examples of flowchart symbols and a sample flowchart question. Finally, it includes two exercises asking students to create flowcharts to determine if car headlights are on and if a student's average marks qualify them for a star.

1. I/O,Process,
Control &
Flowchart
INTRODUCTION (PART 1)

2. Lesson
Objectives
To enable students to understand :-
Control Technology
The term Input, Process and Output
Flowchart symbols

3. Control Technology
A control technology
Used everyday – control and monitors specific
things
Based on
Input Process Output
Example : Washing machine, electric kettle

4. Input
How the
system
starts, stops
or changes
Process
Computer
will carry out
the
instructions
Output
Result of the
instructions

5. Example : You have to press a
button to open the train door
Input : Button is pressed
Process : Instruction send to the control
Output : Door opens

6. What is a Flowchart?
A flowchart is a diagram that
represents a set of instructions.
1
Flowcharts normally use
standard symbols to represent
the different types of
instructions.
2

7. Flowchart Symbols
Start/Stop Input/output
Process Decision
Direction of flow Connector

8. Flow chart Question :
1. Students were asked to input their answers for the question
“ Which is the best subject?”
2. If their answer = “Computer Science”, then the system will
display “Of course it is!”
3. Else, it will display output “Try Again!” and go back to Step 1

9. Flowchart
Example

10. Exercise 1
Create a flowchart that will determine if car’s
headlights are ON.
If they are ON, then do nothing. If they are OFF,
then turn them ON.

11. Exercise 2
A student whose average marks is above 75 is awarded a star.
Fill in the following phrases in the flowchart for finding if a student gets a
star or not.
• Yes
• No
• Award a star
• Do better to get a star
• Is average greater than 75

12. THE END