<< Chapter < Page Chapter >> Page >

Technology

Grade 7

Electricity

Module 15

Designing and making a warning system

Assignment 1:

To design and make a warning system

[lo 1.1, 1.2, 1.5 to 1.13]

Design and make a warning system with two output devices (light and buzzer) that can be installed at the door and inside the room. This system should be able to tell the occupants of the room when somebody else wants to enter at the door by giving off a light and sound signal in the classroom.

Situation

The door of the Technology class is connected to the classroom by means of a long passage. It is sometimes impossible for the occupants of the room to hear when somebody is knocking at the door. Therefore is it necessary for someone to shout or hammer on the door. The teacher prefers that the door should be kept closed because pupils sometimes tamper with other learners’ products or with tools that are stored in the passage.

  • Investigation:

Analyse and write the problem down in your own words.

Research:

Make a list of existing products and solutions. Paste pictures of their appearance and cost.

Modelling:

Investigate different types of switches and make models of types that would suit to resolve the problem.

Design:

Design brief (Who? What? Where? When? Be able to?)

Specifications and constraints:

  • Who is it for (age, access)?
  • What is its purpose?
  • What will it look like?
  • What influence will it have on the environment?
  • What will the cost of the materials used be?
  • Distance between input and output?

Initial designs / solutions:

Choice with reasons:

Final design (develop design and solution further):

Make:

Make a list of all the resources (tools and materials) needed. Also add the quantities or dimensions.

Materials Quantity/Measurements

Draw a simple flow diagram to show the steps for making the product.(LO 7.1.3.1)

Draw a simple working drawing of your final product. Use colour, shade, thick and thin lines and shadow.

Evaluation

Product

Does the product satisfy the design brief? Explain.

Does the product satisfy the specifications and constraints? Explain.

Suggests any improvements to your final product.

Process

How well did your making compare to your planned steps?

Suggests any improvements to your plan of action.

Assessment

Learning Outcomes(LOs)
LO 1
TECHNOLOGICAL PROCESSES AND SKILLSThe learner will be able to apply technological processes and skills ethically and responsibly using appropriate information and communication technologies.
Assessment Standards(ASs)
We know this when the learner:
investigates :
1.1 investigates the background context, the nature of the need, the environmental situation, and the people concerned when given a problem, need or opportunity set in a local context;
1.2 examines existing products relevant to a problem, situation or need.
1.3 investigates by performing simple practical tests relating to aspects of the technological knowledge areas (Structures, Processing, and Systems and Control);
1.4 during investigations, plans a strategy for collecting data and information.
design :
1.5 writes or communicates a short and clear statement or a design brief for the development of a product or system related to a given problem, need or opportunity;
1.6 lists product and design specifications and constraints for a solution to a given problem, need or opportunity.
1.7 generates at least two alternative solutions and annotates the ideas;
1.8 chooses possible solutions, gives sensible reasons for choice, and develops a chosen idea using graphics or modelling techniques;
make :
1.9 develops a plan.
1.10 chooses and uses appropriate tools and materials to make products by measuring, marking, cutting or separating, shaping or forming, joining or combining, and finishing different materials with some accuracy;
evaluates :
1.12 evaluates the product or system based on criteria linked directly to the design brief and some of the specifications and constraints, and suggests improvements or modifications;
1.13 evaluates the efficiency of the plan of action followed and suggests improving future plans.

Questions & Answers

how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Berger describes sociologists as concerned with
Mueller Reply
Got questions? Join the online conversation and get instant answers!
QuizOver.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Technology grade 7. OpenStax CNX. Sep 10, 2009 Download for free at http://cnx.org/content/col11032/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Technology grade 7' conversation and receive update notifications?

Ask