NCERT Class 8 Vocational Education Chapter 4 Home Automation

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NCERT Class 8 Vocational Education Chapter 4 Home Automation

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. CBSE Class 8 Vocational Education Textual Solutions in English Medium are part of All Subject Solutions. Here we have given NCERT Class 8 Vocational Education Notes, CBSE Class 8 Vocational Education in Englishi Medium Textbook Solutions for All Chapters, You can practice these here.

Home Automation

Chapter: 4

Part 2: Work with Machines and Materials

Intex Question

Page No: 90

1. Why do you think automation is required?

Ans: In my opinion, automation is important because it saves time, energy and effort. It automatically turns on/off appliances, avoids human errors like forgetting to switch off lights or fans, and helps reduce electricity bills and save resources.

2. What excites you the most about the automated systems you observed?

Ans: It is exciting to see how automated systems sense changes and take action on their own—for example, lights turning off when no one is in the room or a water pump starting automatically when the soil becomes dry. Such smart actions make life easier, save energy, and reduce effort.

3. Brainstorm ideas you may have to make life easier and free of drudgery (for example, to help your parents or complete any laborious activities). Let your imagination run free. 

Ans: Here are some short, ready-to-use ideas:

(i) Automatic floor-cleaning robot: cleans and mops the house while family rests.

(ii) Smart kitchen helper: chops, mixes, and reminds about cooking steps.

(iii) Clothes-folding machine: dries and folds clothes neatly.

(iv) Voice-controlled study planner: sets reminders and organises homework.

(v) Solar-powered garden waterer: waters plants automatically, saving time and energy.

(vi) Self-sorting waste bin: separates dry and wet waste for easy disposal.

Page No: 92

Now, design a few circuits on your own and try them out. Answer the following questions based on the circuits you designed on the simulation platform. 

1. Which software did you use? 

Ans: Tinkercad 

2. Did your circuits work? Try different components, such as other batteries and resistance values. Write down your observations of changes as a result of these trials.

Ans: Yes, changing the battery voltage or resistance changed LED brightness and buzzer sound—higher resistance lowered brightness/sound while higher voltage made them stronger.

3. Draw the diagrams of the circuits you designed.

Ans: 

Page No: 94

1. Which circuit did you make? 

Ans: I made a LED blinking circuit  on a breadboard.

2. Which components did you use? Write their specifications. 

Ans: I used Arduino Uno microcontroller, breadboard, 5 mm LED, 220 Ω resistor, jumper wires, USB cable, and a 9 V DC battery to make the LED blinking circuit.

3. Draw circuit diagrams of the circuits you designed.

Ans: 

Page No: 102

1. Did your circuit work the first time? If not, please write down what you need to fix.

Ans: Initially it did not work because of a loose jumper wire connection.

After checking connections and re-uploading the Arduino code, the circuit worked.

Page No: 103

1. What automation system do you want to make? What is the process? 

Ans: I want to build an automatic plant irrigation system.

The process to build the automatic is:

(i) Connect a soil moisture sensor to the Arduino Uno microcontroller.

(ii) Write and upload a program in the Arduino IDE that measures soil moisture values.

(iii) When the soil moisture drops below a set level, the Arduino sends a signal to a relay module, which turns on a small water pump to water the plants.

(iv) When the soil reaches the required moisture, the program automatically turns off the pump.

(v) Finally, test the circuit for continuous use and package it with a 9 volt battery or adapter.