1. Maker Education Manipulator
A guest education robot

2. Lesson 9 Unplug the charger at the setting time

3. CONTENTS I. Introduction of subject
II. Explanation of knowledge points
CONTENTS
III. Skills competition
IV. Classroom summary

4. I. Introduction of subject

5. Alarm clock 1 1

6. Target task 2

7. II. Explanation of knowledge points

8. Unplug the charger at the setting time
Function breakdown
Compared with the previous design of the program, what is the biggest characteristic of the program to unplug the charger at the setting time? 1 1
Unplug the charger at the setting time
Set the time
Unplug the charger

9. 2 Achievement of time setting
How to achieve the function of time setting?
Current time
Start time
Setting time
< + ？

10. Program flow chart
Acquire the system time and set it as the start time
Set the fixed time
Acquire the current time
Judge whether the current time is the setting time
Unplug the charger No 1 3
Yes

11. Function achievement: unplug the charger4

12. 1 5 Function achievement: time setting Step 1: acquire the system time
Step 2: view the format

13. 1 5 + < ？ Function achievement: time setting
Step 3: time relationship 1
Step 4: logic judgment 5
Step 5: repeat the operation
“When” cycle “Till” cycle
Setting time
Current time
Start time +
< ？
Acquire the current time which is reflected in the program running process in a real-time manner
Record the program start time, and assign a value through the acquired time at the beginning of the program.
The setting time is expressed in seconds.

14. Example of comparing time program with “when” cycle
Function achievement: time setting
Example of comparing time program with “when” cycle 1 5

15. Function achievement: view the implementation process6

16. III. Skills competition

17. It is time to operate by yourself!

18. I control my manipulator
Operation purpose: Blockly program advancement
Operation task: the manipulator performs the function of unplugging the charger automatically

19. Program example

20. IV. Classroom summary

21. Summary What have we learned in this lesson?
- Achieve the implementation of a certain task by the manipulator using the graphical programming software
- Acquisition and logic judgment of the learning system time, the function and operation method of “When” cycle and “Till” cycle structure, printing module, etc.;
- Review the definition and call of the function, the definition and assignment of variables, mathematical operation, the movement mode of the manipulator, time delay and other functional modules.

22. After-class thinking
How to write the statements when “Till type cycle structure” is used to achieve the judgment of time setting?

23. THANK YOU