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Grade 6

Systems and control: an electrical shock

Module 15

Making a traffic regulator

To the Educator: This assignment can be executed as an individual or as a group project.

(a) What is the problem? You are a citizen of Muddle Town. The town traffic is always chaotic because drivers do not stop their vehicles at the main street crossing. Everyone is permanently late for work because of the frequent accidents and regular congestion of traffic at this important street intersection.

(b) What is required? A “machine” that will regulate the traffic in a reasonable way from day to day.

  1. What is your brief? You are asked to design and build a prototype machine that can be erected at the street intersection to regulate the traffic.

(d) What limitations are placed on your prototype? You may use: 3 light bulbs of different colours (LED’s) as resistors; a battery as energy source and a container for the battery; lengths of copper wire with clamps as conductors; a wooden board; 4 drawing pins; and a paper clip as the switch.

Only one light may glow at any particular time. The lights must indicate to motorists that vehicles in one traffic lane have to stop while vehicles in another lane may continue travelling. One of these machines will be erected on each of the corners at the intersection, but you need to build only one.

You may present the machine in any form, but it may not be higher than 30 cm and wider than 20 cm. It must be solid, stable and strong.

Assignment 1

[lo 1.2]


Consult different sources and suggest at least three solutions for this problem. Draw sketches of these solutions or write notes about the possibilities that you are suggesting.

Assignment 2

[lo 1.5]


  1. Make free-hand drawings of three circuits that could provide solutions to the traffic problem. Also provide labels.

Your final choice

Draw the circuit diagram of your final choice.

[LO 1.6]


  • Must the lights be connected in serial or in parallel if they need to work one at a time?
  • What must be shifted to a different position so that only one light will light up at a time?
  • Design a stand on which the lights, switch and battery can be mounted for the machine to work. This machine will eventually be controlled automatically, but someone will have to be employed to operate the changing of the lights, in the mean time. Discuss the requirements for such a stand with the members of your group. Indicate the dimensions so that it will be possible for other people to understand your ideas and how the machine works.

[LO 1.5]

Develop your best idea fully.

Assignment 3

[lo 1.9]


  1. Build the stand for the circuit. What materials will you be using?
  2. Which tools will you be using?
  3. Which action will you be taking – give a step by step explanation of what you will do:

[LO 1.8]

  1. Mount the circuit on the stand.
  2. Demonstrate your invention to the rest of the class and explain how it works.
  3. Provide a suitable name for your invention.
  4. Write a step-by-step description of how you made your invention.

[LO 1.7]

Assignment 4

[lo 1.10]


Questions & Answers

How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
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
characteristics of micro business
for teaching engĺish at school how nano technology help us
How can I make nanorobot?
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
how can I make nanorobot?
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
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.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
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Source:  OpenStax, Technology grade 6. OpenStax CNX. Sep 08, 2009 Download for free at http://cnx.org/content/col11005/1.1
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