Page 143 - Toucpad robotics C11

21 st
Century #Experiential Learning
Skills
The choice of battery is crucial for mobile robots, as it directly impacts their weight, size, power
capacity, and operational time. Lithium-ion (Li-ion) and lead-acid batteries are two common
options, each with its own set of advantages and limitations. How do engineers decide between
lithium-ion and lead-acid batteries for a given robot based on factors such as energy density,
deep power requirements, and cost? How does the power consumption of other components, such as
thinking motors and sensors, influence the battery selection process?

21 st
LAB ACTIVITY Century #Coding & Computational Thinking
Skills
Obstacle Detection with Ultrasonic Sensor

∑ Tools: Arduino Uno, Ultrasonic Sensor (HC-SR04), Buzzer/LED.
∑ Task: Make a system that detects objects and gives an alert.
∑ Steps:
1. Connect ultrasonic sensor to Arduino.
2. Write code: measure distance if distance < 20 cm turn ON buzzer/LED.
3. Test with objects at different distances.
∑ Outcome: Students explore sensor integration and closed-loop feedback systems.

Answers
Exercise (Section A)
Quiz
A. 1. ii 2. iii 3. ii 4. ii 5. ii 6. ii 7. ii 8. ii 9. i 10. iv
B. 1. Actuators 2. Servo 3. Sound 4. Feedback
5. Battery 6. Feedback 7. Brain 8. Obstacle
9. Steps 10. Control
C. 1. False 2. True 3. False 4. True
5. True
D. 1. c 2. b 3. d 4. a 5. e

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Electrical and Control Systems