My dnt blog

2008-04-30T14:36:00.000+08:00

HAHAHA !!!
today last day liaos.
No more dnt posts liaos.
this will be graded finally !!!
HAHAHA, Mr soo, fang bian uii
i do a total of 19 posts
excluding this horhs.
must rmb to grade me high high horhs XD
this is the end of the post today :D thanks =P

2008-04-25T17:22:00.005+08:00

Hey hey ,
realised i long time never post again liaos.
so today come and post
hahas, i wann put a post today specially on my dnt mechanical toy !!
let me show uii how it looks like !!

MY CAM !!

THE DOVE, ONE OF MY DESIGN XD !!

A COMPLETE VIEW OF MY MECHANICAL TOY !!

FOCUS ON THE MOVING TOY !!

TOP VIEW OF THE TOY !!

BOTTOM PART OF THE TOY

SIDE VIEW OF THE TOY !!

DONE,
finally updated my blog. need to be marked soon.
so i will put more and more post within this week
Thanks for your tag and comments !!

2008-04-17T17:40:00.004+08:00

Today sick XD
nothing to do ,
so come here to post barhs
What i am gonna talk today is about SOLAR ENERGY !!
What is solar energy ?
Solar power is energy from the sun and without its presence all life on earth would end.
Solar energy has been looked upon as a serious source of energy for many years because of the vast amounts of energy that are made freely available, if harnessed by modern technology.
A simple example of the power of the sun can be seen by using a magnifying glass to focus the suns rays on a piece of paper.
Before long the paper ignites into flames.
This is one way of using the suns energy, but flames are dangerous and difficult to control.
A much safer and practical way of harnessing the suns energy is to use the suns power to heat up water.
A magnifying glass can be used to heat up a small amount of water.
A short piece of copper tube is sealed at one end and filled with water.
A magnifying glass is then used to warm up the pipe.
Using more than one magnifying glass will increase the temperature more rapidly.
After a relatively short time the temperature of the water increases.
Continuing to heat the water will cause water vapour to appear at the top of the tube.
In theory, with enough patience, several magnifying glasses and very strong sun light enough heat should be generated to boil the water, producing steam.
This is one way of harnessing solar power.

these are the pictures whoch shows the ones i am talking about :)

The principle of heating water to boiling point was used by the French in 1888.
They developed a solar powered printing press.
It used the energy of the sun to boil water, producing steam.
The steam was used to drive a steam engine which provided the power to drive the mechanical printing press.
The machine was unreliable and very expensive to manufacture.

Modern solar panels are a combination of magnifying glasses and fluid filled pipes.
The solar panel seen opposite has a glass front which is specially made to focus the power of the sun on pipes behind it.
The pipes carry a special fluid that heats up rapidly.
They are painted black to absorb the heat from the sun.
The silver reflective surface behind the pipes reflects sun light back, further heating the pipes and the fluid they contain.
The reflective surface also protects anything behind the solar panel (such as a roof).
The heat produced in the pipes is then used to heat a tank of water. This saves using electricity or gas to heat up the water tank.

END of my lesson of SOLAR ENERGY !!
goodbyes !!

2008-04-16T18:22:00.004+08:00

Hey , hey ...
really damn long time never post ler.
haixx,
come to post more now since deadline is coming,
What am i talking today ?
Let's find out !!
TOday i am gonna talk about ELectronis components :D

There are a large number of symbols which represent an equally large range of electronic components.
It is important that we can recognise the more common components and understand what they actually do.
A number of these components are drawn below and it is interesting to note that often there is more than one symbol representing the same type of component.
(Check all your information sheets in the electronics section for more symbols).

now i wanna talk about other electric components XD

There are a large number of symbols which represent an equally large range of electronic components.
It is important that you can recognise the more common components and understand what they actually do.B A number of these components are drawn below and it is interesting to note that often there is more than one symbol representing the same type of component.
(Check all your information sheets in the electronics section for more symbols).

2008-03-05T12:14:00.002+08:00

hellos , another post today !!
i had alredy wirtten so much on my blog ler , now it's time for a recap !!
there are a total of 22 question ... see if uii can puzzle all the answer in your head XD ...

1)What type of motion is movement backwards and forwards in a straight line?
Reciprocating.

2)Which type of motion describes a child swinging on a swing?
Oscillating.

3)Movement in a straight line called _______ motion.
Linear.

4)One method of transmitting force and rotary motion from one shaft to another is by using _______ .
Pulley wheels and belt.

5)By altering the _____ of pulley wheels in a pulley system it is possible to adjust the speed of output rotation.
Diameter.

6)In simple gear trains the driver and driven gears rotate _______ .
In opposite directions.

7)A crank is a handle like input device that when turned makes parts of a machine _____ .
Move or operate.

8)All mechanisms involve some kind of _____.
Motion and force

9)All mechanisms must produce some kind of _____ .
output.

10)Which type of motion describes the up and down movement of the Carousel horses?
Reciprocating.

2008-03-05T11:55:00.003+08:00

What is a mechanism ?

Mechanisms are devices that have been designed to make jobs easier.

They all have certain things in common:

They involve some kind of motion.
They involve some kind of force.
They must have some kind of input to make them work.
They produce some kind of output.
If we connect mechanisms together we can build mechanical systems called machines.

Example is this mechanical dog :)

lalala , this is it !!

this is actually a better view as just now tat one is negative der :)

2008-03-05T11:45:00.002+08:00

wwow , two months never update lerhxx ... haixx , busy ma ... i will update now ...

Many people sometimes didn't understand what the teacher is talking about ...

So today i m gonna talk about technical vocabulary =P

An Axle is :
A rigid rod that connects together a pair of wheels on a vehicle or moving toy.

A Crank is :
A handle like input device that when turned makes parts of a machine move or operate.

A Diameteris :
The length of a straight line drawn across a circle passing through it's centre.

An Eccentricis :
A round shaped cam.

A Follower is :
A rigid rod or part of a mechanism that rest against the edge of a cam moves up and down as a cam rotates.

A Force is :
Forces are pushes or pulls that make things start or stop moving, move faster or slower, change shape or direction.

A Friction is :
The force that stops things from moving freely when they rub against each other.

A Fulcrum is :
The pivot point around which a lever turns.

A Lever is :
A rigid rod pivoted about a fixed axis called a fulcrum.

Linear motion is :
The Movement in a straight line.

A Linkage is :
A series of levers connecting together moving parts of a mechanism.

A Motion is :
A Movement.

An Offset is :
The distance of the centre of a cam or wheel from the centre of rotation of a shaft or axle.

An Oscillating motion is :
Movement backwards and forwards in a circular arc.

A Parallel is :
When two objects or lines are the same distance apart along the whole of their length.

A Pivot is :
The central point or short shaft on which something balances or turns.

A Reciprocating motion is :
Movement backwards and forwards in a straight line.

A Rotary motion is :
The Movement in a circular direction.

A Segment is :
One of several parts or pieces that fit together with others to make up a whole object.

A Shaft is :
A rod in a machine to which cams, gears and pulleys are attached.

A Torque is :
The turning effect of a force in rotary systems. Measured in Newton Metres (Nm).

An Undulate is :
To move in a wave like motion.

2008-01-30T17:43:00.000+08:00

xiaojie asked mi to update my blog , m here i m !!
mr soo told us a lot of mechanisms during these two lessons ...
and i am here to type it ,
pictures may be loaded next time due to not enough time
so bear wit it

Steel Rule: It is used to measure and mark dimensions.

Scriber: It is used to mark or scribe lines on the metal workpiece.

Try Square: It is used for marking and checking right angles.

Spring divider: It is used to mark circles or arcs on the metal workpiece.

Odd leg caliper: used to scribe a line a set distance from the edge of workpiece.

Inside Caliper: It is used to measure dimensions such as diameter of a hole, width of a slot etc.

Outside Caliper: It is used to measure outside dimensions such as diameter of a rod, thickness of a plate etc.

Centre Punch: It is used to mark a centre for a hole to be drilled.

Dot Punch: It is used to make punch marks along a line on the metal piece.

Pencil: The pencil makes two specific types of lines: orientation marks (E.g. face side and face edge) and cutting guidelines.

Marking Knife: It is used together with a Try Square to make cut lines across the grain.

Marking Gauge: It is used for marking lines parallel to the edges of a wooden piece

Try Square: This is used to test that one surface is square (90 degrees) to another, and for marking out lines square to the face-side or face-edge..

Mitre Square: It is used for marking and checking an angle of 45 degrees

Sliding level: It is used for marking and checking any angle from 0 to 180 degrees.

Pencil Compass: It is used to mark circles or arcs on the wood/plastic workpiece.

Template: It is used to mark out workpieces of the same shapes and size quickly and accurately.

Hacksaw: A saw used to make straight cuts in metal

Cold chisels are used for cutting heavy metal that cannot be sawed with a hacksaw or cut with shears.

The more common types of cold chisels used in metalwork: the flat, crosscut or cape, round-nose or half-round, and diamond-pointed chisels. Chisels can be sharpened by grinding.
The flat chisel is most widely used and has a place in every workshop or tool kit.

This chisel can be used for cutting rods, bars or sheet metal

Files: File is a hand tool used to smoothen or fit metal parts. It is made of high carbon steel. Its teeth remove fine chips of material on the forward stroke of the file.

File card: A File card is a brush with metal bristles, used to clean the cutting grooves in a file

2008-01-24T13:05:00.000+08:00

hihi
long time never post liaoxx
got this from xiaojie blog
traded one post of mine for one of hers

Dnt General Workshop Rules

1.No workshop practiceis to be carried out by pupils without the presence of the teacher or instructor.
2.Always use the right tool for the right job and return it to its proper place after use.
3.Extreme care should be exercised when handling sharp-pointed or sharp-edged tools.
4.Do not use tools that are blunt,badly worn,mushroomed or in poor condition.
5.Pupils should not operate machines unless they have been instructed upon their correct use.
6.Report any damage to machines or equipment as this could cause an accident.
7.Always wear an apron as it will protect your clothes and holds lose clothing in place.
8.Wear good strong shoes. Slippers and sandals are not allowed in the workshop.
9.Shirts with long sleeves,watches,rings,bracelets and bangles should not be worn during workshop sessions.
10.Female long hair should wear a scarf or headband to keep their hair from becoming a hazard during workshop practice.
11.Do not rush. Watch your steps while in the workshop.
12.When in doubt,always ask.

2008-01-13T16:50:00.000+08:00

NOW NOW NOW ,
posting 3 posts at one day ...
HMMM HMMM HMMM
What shall i write next ??
ohya ...
i wann to do a introduction of my blog !!

Functions of my blog :
CAn put posts n express what i feel ...
Can put posts ...
Can link my DARDAR ...
And lastly can earn marks for DNT !!
i know the functions are realli short ...
but then i don't know what to post lehxx ...

2008-01-13T16:42:00.001+08:00

talking about msn windows live messanger ...
now gonna talk about yahoo messager like what i had said earlier ...

what are its functions ??
let's see ...
CAn talk to someone online ...
can send email
CAn use webcam talk to other people ...
CAn check for incoming call ( if uii got register )
CAn have voice message
Can invite people to talk together ...
CAn conference
CAn nudge somone ( my favourtie )
Can send them audibles ...
And lastly , can play game of course ...
In terms of both yahoo messager and windows live messager ( no offence ) : actually yahoo messager is better ... but then , Windows live's design is nicer and better ... so more people chooses Windows Live Messager ...

2008-01-13T16:15:00.000+08:00

let mi see ,
nothing to post leh
Dun have anything to post liaoxx
What shall i gonna do ?
haixx , anyhow put things lor ...
i do what mingru did
An introduction to windows live ...

hmmm , i doe noe how to introduce la ...
anyhow type der lor

kkaes ...
Function :
- can talk online
- can play jigsaw with your friends
- can video call ( if uii got webcam )
- can exchange folders ...
-Can send a single file
- CAn send email
hahaxx ... that's all i can think of ...
but idea quite good la ...
Can think of so many function can liaoxx
so wait next time ...
i think i m gonna talk about yahoo messager ba ...

2008-01-04T16:38:00.000+08:00

Took this out from genevieve's blog ...
Agreed tu let her take one from my blog too
I ki siao ler
nothing tu post so trade post
MUAHAHAHA
I got ask for permission der hor ...
So it's legal =P

Design is about:
Function
Aesthetics
Ergonomics
Innovation
Materials
Environment

FUNCTION::
Function is the activities and actions a product should perform.

AESTHETICS::
Aesthetics is the overall look of a product

Ergonomics::
Ergonomics is the designing for comfort and safe use

Innovation::
Innovation is about looking for clever ways to solve design problems

Materials::
We must be aware of the properties of the materialsso that we are able to choose suitable materials for their design. We must also think about the materials in terms of their appearance as there will be different impressions.

Environment::
We have to protect and preserve the environment so products that are well-designed are friendly to the environment.

2008-01-03T16:20:00.000+08:00

15 days since i posted !!
I ran out of things tu post ler !!
so i m going tu do an introduction about the Dusty DNT room which had not been used for two months !!

this is the band saw !!

This is the oven

This is also the oven

This is the soldering machine :)

This is the strip heater =P

The rest will be posted another dae ::
End of lesson !! RIIIINNNGGGG !!!

2007-12-15T21:42:00.000+08:00

oh ... hello ?
Don't realli know what to post , a lot of people getting up lerhxx ...
Took this out from my old dnt blog ...
Asked MrSoo permission b4 ler ...
Not happy tell MrSoo ...
And then horhxx , if uii not happy think la ... The photo i took der leh , of course i can take der isn't it ?
Thanks for understanding ( If uii realli did understand )

Tenon saw:
Cutting wood is best done with a tennon saw. This has a fine blade which cuts both hard and soft woods very cleanly. It should be used in conjunction with a wooden mitre. This helps to hold the wood firmly and cut accurate straight or angled lines. The tennon saw should handle most small scale jobs and is essential. Wood Saw:A small wood saw with a 12 inch blade has rough teeth but is capable of cutting to any depth and is much easier to use on larger pieces of wood. This again is an essential item. Fret Saw:This saw has a very fine, thin blade and is kept under tension so that it can’t bend. The saw frame has a large depth enabling you to work on larger pieces of wood. The fret saw in mainly used for cutting out intricate shapes and patterns. The blade is thin so is capable of turning very sharply which gives it such flexibility. It is great for cutting out shapes such as animals etc. in ply wood. A fret saw can be used on both wood and metal (using special blades) and is also essential.
POWER SAWS:
Power tools are great labour saving devises and can considerably lesson the time it takes to make an Automata. They do however command a great deal of respect and common sense when being used. Power saws are possibly the most dangerous tools to work with as one careless mistake can be very harmful. I don’t wont to put you off using them but to make you aware of the potential risks. (Treat with respect they are safe). When working with power tools always wear safety goggles and keep ties, jewellery and any loose clothing or articles away from moving parts. BAND SAWS:The band saw is a very versatile power tool. You can cut wood in a straight line with use of a mitre and there are attachments to enable you to cut circles and even turn it into a scroll saw. When used with a narrow blade you can cut curved shapes and with care and practice quite intricate shapes can be cut out of wood, plastic and even thin metal. It is not practical for using on small work as you do not want to get your fingers too near the blade.Band saws come in all shapes and sizes and are often referred to as two or three wheel types. This refers to the the actual wheels the blade rotates a round. Many come with variable speeds which is useful when cutting materials such as perspex that need to be worked at a slower blade speed to stop it melting and rejoining.The band saw is a very useful tool to have and small relatively inexpensive ones are available from many tool suppliers. For the serious automata maker they are useful but not essential. Children should never use one. If you don’t like the idea of working with a band saw then stick to hand saws.
SCROLL SAW :
The scroll saw has a very fine blade that is powered up and down at about 1400 rpm. It is the power version of the fret saw and as such can cut very intricate shapes and to quite a small size.As with any power tool it is not advisable to get your fingers too close to the moving parts. The scroll saw is quite forgiving (unlike a band saw) but should still be used with respect. When operating a scroll saw your fingers are often very close to the blade and it is important not to push them into the front of the part which has the cutting edge. An accident with a scroll saw is unlikely to cause a very serious injury. It is this comparative safety that makes them popular in schools and suitable for older children to use if closely supervised.The scroll saw can be fitted with a range of blades and can cut wood and metal up to two inches thick. They are extremely versatile and great labour saving devises. (A real must for the serious automata maker).

2007-12-13T10:12:00.000+08:00

Hello ...
I realli got nothing to post ...
Mr Soo call me take photo from youtube ...
that's what i m doin now ...

This is the elmo dancing ( everybosy know that elmo is a toy of couse )

This is a Toy , but it's really funny :)

This is about a dog( but then dog is a mechanism )

2007-12-05T14:28:00.000+08:00

previous post too long lerhxx ... so continued by new posted ( meanwhile waiting for wanyi to do something )
I am talking about colours today !!

What are colours ?

Colours is one of the first things people consider and notive about a product ... And tell uii what , designers always use a fixed group of colour ...

Harmonising colours are closer together on the colour wheel

2007-12-01T17:15:00.000+08:00

Lets step in further to Aesthetics !!

What are aesthetics ?

Aesthetics is about the appearance of a product. It is also about the 'feel' of a product . What is the 'feel' i meant ? The 'feel' i mentioned is the kind of feel that will affect your emotions and senses !!

Aesthetis appeal is not the same for everyone . Different groups of people have different likes and needs which can be influenced by factors including age, gender and cultural background . It is also useful to know the basic elements of aesthetics ... It includes :
- Lines( that define the product)
Straight , curved and organic
- Shapes
Geometric and organic
- Forms
Geometric and organic
- Colours
Harmonising and contrasting
- Textures
Smooth, rough and bumpy
- Proportions
Symmetric and asymmetric

Further knowledge to LINES !!

Lines are basic elements of design. They indicate position, direction and sometimes other information ... Different types of lines will give you different feelings about a design ...

- Vertical lines(Tall building)
Demands attention ...

- Wide and jagged lines
Boldness and strength ...

- Curved lines
Represent smoothness and gentleness ...

- Slanted lines(Racing Cars)
Movement ...

- Short and crisp lines
Youthfulness and fun ...

- Lightning bolts or electrical signals
Potray action and energy ...

- Wavy lines
Convey a flowing movement ...

- Horizontal lines(Park Bench)
Passive and motionless ...

- Delicate and elegant lines
Uniterupted flow ...

Further knowledge to SHAPE !!

What is a shape ?

A shape is actually formed when a line encloses in area ... It is normally 2D ...
There are diffrerent kinds of shapes :
Geometric shape : Geometric shapes have stright lines or regular curves. They are often symmetrical. A rectangle, a circle, a square and a triangle are all examples or geometric shapes ...

Organic Shapes

Organic shapes are shapes we see in nature. they have free flowing lines ans are often non-symmetrical ...

Combining Shapes

Combining shapes are actually simple shapes that are combined or modified to form a more complex shape ... this is actually a good way to explore ideas for new shape :)

Forms

A form is actually something that has a thickness or depth ... it ish 3D which means that they have a length , breadth and depth :)

Geometric forms

Like Geometric shapes , geometrics forms are regular and mostly aymmetrical. A sphere, A rectangular block, A cone and a cylinder are examples of it :)

Organics forms

Organic forms is very somple to undersatnd : it's the forms we see in nature ... they have normally irregular, curved and flowing outlines ...

Combining Forms

Simple forms can be combined or modified to form a complex form is call combining forms ... just like this playground !!

2007-12-01T16:58:00.000+08:00

Lets learn about some labels !!

Household electrical, electronic and gas products (e.g., Washing machine, television set and gas cooker) that carry the SAFETY mark have met the safety requirements set by SPRING Singapore, the safety authority. These products are therefore safe for use by consumers ...

Weighing and measuring instryments with this label have been verified by the Weights and Measures Office of SPRING Singapore and are fit for use, However, this label is not a guarantee that the instrument will remain accurate after the verification has been carried out ...

Food products with the Healthier Choice Symbol are generally lower in fat and sodium, and some are also higher in dietary fibre and calcium as compared to similar products of the same category. This symbol by the Health Promotion Board helps comsumers make informed food choices ...

2007-12-01T12:27:00.000+08:00

Lets recap what had we learnt last year !!

What is design actually ?

Design is actually about creating a product that does its job well ...
It is about creating a product that has a distinctive look or feel ...
It is about creating a product that are comfortable and safe to use ...
It is about being innovative ...
It is about Choosing suitable materials to make the product ...
It is about protecting and preserving the environment ...

What are functions ?

Functions are actually the activities a product should perform ...

What are aesthetics ?
Aesthetics is the overall look or appearance of a product ...
e.g.Different designers have different ideas so that the products they create that does not look the same at all ... One of the designs that will look different is Watches ...

How do we describe products ?

Describing of the products are classified under Aesthetics ...
We may use words like :
-Modern
-Old-Fashioned
-Masculine
-Plain
-Streamlined
-Boxy
-Sophiscated
-Elegant
-Angular
-Curvy
-Bulky
-Slender

What are Ergonomics ?

Ergonomics are actually the process of designing for comfort and safety usage ...
Some points we can take note for ergonomics ...
-Holding the product
-Carrying the product
-Working with the product
-Wearing the product
-Sitting on the product

Some guidelines to help you in designing for safe use ...
-Do not use toxic paints
-Avoid sharp points on your products
-Avoid having small or loose parts on your products for children as they may pose potential choking hazards ...

When you want your design to be ergonomic.Consider :
-Safety
-How the user would use the product
-proportion
-Size
-TExture

In Designing some products ... you may also like o consider the adjustable parts and layout of information ...

What are innovation ?
Innovation is about looking for clever ways to slove design problems ...
It may also use existing materials in a new way or improving on the function of an existing product ...
Advances in technology may result in products that are smaller and perform more functions that those already in use ... e.g. Computer files , Stroage devices and Mobile phones ...
When you look at product in the past , you will see how designs have changed over time in terms of the materials use and ways things are made to work ...

What are materials ?

The products around us are made from different materials ... it can be group as follow :
-Wood
-Metals
-Plastics
-Ceramic
-Glass
Minerals

Designers must also be aware of the properties of different materials so that they are able to choose suitable materials for their designs ...
Designers must also think about the materials in terms of their appearance when designing for different people ...
E.g. A watch with pictures on it may give an informal look on it ...While a watch with stainless steel strap may give a formal look ... brightly coloured plastics make a product look attractive :)

What is mean by the subject ENVIRONMENT ?

Environment means products that are well designed and it's friendly to the environment ...

Here are some guidelines for designers to adopt in order to design environment friendly products :
-Do not waste materials
-Use materials that have been or can be recycled
-Use renewable materials
-Use biodegradable materials
-Design product to be energy efficent
-design products to use renewable energy
-Use less harmful chemicals in the product itself or in the manufacturing process to make the product ...

Summary of what we had learnt

- Design is about creating a product that functions well...
- The functions of a product are the actions or activities it should perform...
- Design is about creating a product that has distinctive look or feel...
- The overall appearance of a product is called its aesthetics...
-In designing, it is important to consider function as well as aesthetics...
- Design is about creating products that are comfortable and safe to use...
- Designing for comfort and safety is known as ergonomics...
-A successful design is usally innovative - it is an idea that is new and completely different from other ideas already in use...
- Design is about choosing suitable materials...
- Designers must be aware of the properties and the appearance of different materails so that they can choose suitable materails for their designs...
- Design is about protecting and preserving the world...
- Well-designed products are environmentally-friendly...

2007-11-24T15:32:00.000+08:00

NOKIA E51

Functions :

one touch keys -
It can get quick access to not just HOME , CALENDAR , CONTACTS AND EMAIL ... But also one touch bluetooth , web browser and silent mode ...

Full array of connectivity options -
Download , Browse and Email with high speed : 3G , HSDPA , WiFi . Bluetooth, MircoUSB, and infrared allow easy function connectivity with other devices ...

Fast perfeormance -
Made possible by faster processor and large user data memory ...

Easy email set-up -
quick email set-up for POP-enabled email accounts , and supports different
email solution ...