Download ppt - The next big thing!

An automatic fan

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I like the heading. dont make it too big or we wont be able to store it at school.

History The first recorded mechanical fan was the pukha fan used in thet middle east in

the early 19th century. It had a canvas covered frame that was suspended from the ceiling. Servants, known as pukah wallahs, pulled a rope connected to the frame to move the fan back and forth.

The first american fans were made from around the late 189os to the early 1920s. They had brass blades, a lot of them also had brass cages, and though they were built very well internally, they were far from finger safe, as a lot of them had cage openings so big that one could put an entire hand or arm right through it. Many children had hands and fingers severely injured by those fans.

In the 1920s, industrial advances allowed steel to be mass-produced in different shapes, bringing fan prices down and allowing more homeowners to afford them. In the 1930s, the first art deco fan (the "Swan Fan") was designed. In the 1950s, fans were manufactured in colours that were bright and eye catching. Central air conditioning in the 1960s brought an end to the golden age of the electric fan. In the 1970s, Victorian-style ceiling fans became popular.

In the 20th century, fans have become utilitarian. During the 2000s, fan aesthetics have become a concern to fan buyers. The fan is part of everyday life in the Far East, Japan, and Spain (among other places). Electric fans have been largely replaced by air conditioners in offices, but they are still a common household appliance.

Candidate No: 5058 Name: Daniel BrownThis page shows: The history of the product. This info is from Wikipedia

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is this your introduction still? you need to label your pages correctly. also is this cut and pasted from the internet.. if so then please correct this and write something of your own and use some images to ilustraight your writing.

Design brief and introductionI am going to make an electronic fan that turns on automatically when it

gets to hot. Its for those who live in hotter countries such as mexico, but it can be used for anyone in any country, who are above the age of five. The problem my product solves is that when you are too hot, you want to turn the fan on, but because you are hot, you are tired, and you cant really be bothered to get up and turn your fan on, because you would have to use your energy, which would then mean you would get hotter. Now, you can stay relaxing, while you know if it gets to hot, your fan will turn on, automatically. The product will need to turn on automatically at set temperatures that you set yourself. I decided to make this product because it think it would be a challenge, and if i succeed, it would be a good product. The Product Must be completed by the 10th of march 2010. Its targeted at busy office workers that probably havent got the time to stop and turn the fan on. The fan will be shaped like a pineapple, because pineapples are from hot countries, and will be able to sit on a desk.

Candidate No: 5058 Name: Daniel BrownThis page shows: Design Brief

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what you have writen is great. could you explain where the fan is to be possitioned.. does it stand on the floor, is it used on a desk.. a bit more about the kind of size and the kind of people it would be for. you have said that it is for people that get hot but is there a certain type of person that would buy your fan? is it for offic workers, is it for the bedroom, living room, kitchen and how much space can it keep cool, do you need to be near to it.. remember that you have to make this item and thus should not go overboard and say you are going to make something that is not possible and then have a product that does not meet your design brief.

Task analysis Circuit How many Ics will it need?How many inputs will need?How many outputs will it have?What will the size of the circuit have to be?What components will i use?Where will i find information?How much will my product cost to make?What calculations will i need to make?What equipment is needed?What skills and knowledge will i need?How will i test my circuit?Will the circuit be difficult to make?Can the circuit be mass produced?

Will the circuit be able to sit in the case? Case

What Power supply does it use? What are the ergonomic considerations when making

the case? How will it look? What message is it suppose to send? Whos my target market? Is it heavy or light? What materials will i use? Is it environmentally healthy? Will the design fit into my target

market? How will it be positioned? Will its design be easily recognise

Candidate No: 5058 Name: Daniel Brown This page shows the task analysis

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what you have put here is good. you need to go into more depth though. use the coursework support pack to help you identify the areas that you could be considering. at the moment this page is only at a C grade and needs to be pushed up. have a look at some examples, look at what others in the group have done.

Design considerations

Candidate No: 5058 Name: Daniel BrownThis page shows:

Research-existing poducts

Candidate No: 5058 Name: Daniel Brown

This page shows:

The very first hand held fan. It uses big wide propellers that would cover a wide surface area. Its not very attractive and i don’t think its would be as powerful as modern day fans. It doesnt look like it fits to your hand well either.

The basic fan that uses animals as its design. It probably aimed as younger children aged 5-10. Its plastic, its fits to your hand well, and probably cheap.

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you have found some great examples here. your page layout/presentation could be improved. make the text smaller and the images a bit larger. you also need to fill in the 'this page shows' boxes on your pages for them to be complete. you also need to write a little bit at the end of the section about what ideas you have had as a result of finding out this information.

Research existing products


A fan that uses “mini” batteries. Its not very attractive really. It doesn’t look like it fits to your hand.It looks a bit too small, and with the different names on it, i think it would be priced more expensively then the average fan. I think its targeted at anyone under the age of 40.

A fan that has LEDs on its propellers. It is looks exactly like a regular fan, but the fact that it can spell out a word makes it more appealing.

It is probably

aimed at teens.

Research existing products


From what i have found out, i realise now for sure that my design must be colourful, and meet my target market. All of these fans have something unique about them, whether its their design, or how they are made, theses fans arent the same. I must make sure my design is unique, and the way my circuit is made, is unique. It has to be different to sand out from the rest. I think im going to use an exotic fruit for my design. But something bold yet simple may also be used as my case. By bold, I mean something unusual for a fan.

Research components


The positive supply of voltage must be between 3v and 15v

Compares verting and inverting inputs, and the high will determine the output.Changes its resistance based on heat.

Changes resistance set by hand

Turns the circuit on or off.

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this is useful information but you need to go into more detial with each compoent. you also need to have a little analysis of each one and explain why you may or may not use if. you have not shoed the pin out diagrams for the i.cslook at some examples of these pages and show that you are finding components that you may use.

Research Circuits


Research materials


Wood- Its solid, has a nice texture, easy to work with, but it gets damp in water, its expensive and flammable. Its not flexible, and would need a lot of work to be right.

Metals-They have a smooth texture, they are easy to mould and they’re water resistant. But they also conduct electricity, and we dont have any plastic to mould, meaning i would have to buy my own which would be expensive.

Plastic-Easy to work with, resistant to electricity, resistant to water and is very flexible. Its is probably the easiest and cheapest material to use.

Acrylic plastic is easy to vacuum, its light and comes in a variety of colours.

I can also use textured plastic which is also easy to vacuum, but doesnt come in much colours.

From what ive found out, acrylic is the best plastic for me to use because its cheap, easy to vacuum form and comes in a variety of colours.

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not sure what is going on here! what is this page about and what have you found out and why. this page should be an investigation of the types of materials that you could use and their properties. look at the coursework support pack and then complete this page correctly

Research enviromental/industrial, social


Environmental-I need to ensure that my product will be as eco-friendly as possible.The only material ill be using(other then solder and PCB) is textured,

recyclable plastic. My fan shouldnt bee noisy, it should be quiet.

Industrial-My price should be as cheap as possible, im using more technology in my fan,

so it should be slightly more expensive then the average fan.I have to stay inside my small budget. The lower the budget, the lower the

price.I need to make my product simple to advertise.

Social-My design needs to meet my target audience first and foremost, but it should

still be something that can be used by everyone.

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some of the points made here should go into your task analysis and some should go into your specification. a specification point is what it will do and how it must be. a task analysis point is a question about something you will need to consider or decide upon. please read the coursework support pack and re do this section

Research market research


From my questionnaire, i now know that the public like the concept of my product, they like something thats done for them(my product being turned on automatically), they are not fussed about it effecting the environment, and they would prefer something that digitally tells them what temperature there fan is set.

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you now need to get the results and put them on the proceeding pages,, use graphs to show results.

Research summary


From my research, I now know that my overall circuit will be 3 circuits joined together. My target audience will now be for elderly people. The design will be of the shape of an exotic fruit. Also, my plastic will be textured, and my propellers will be environmentally healthy. My product will be a fan turned on automatically when the heat gets to a certain point. My case will be shaped as an exotic fruit of some sort, and will be made out of simple acrylic plastic. My circuit will contain 3 smaller circuits, plus a basic fan circuit; a trigger circuit(that contains a comparator), a 555mono-stable and relay circuit. Ill be using 2 Ics, a 555 and a op-amp. All information i gathered was mostly from my teacher, rapidonline.com and google.

Specification


Development circuits, circuit 1


development circuits, circuit 1


Pin2 goes low, which makes pin7 lose. When pin7 is closed, electrons no longer flow into it, but into the capacitor. As the capacitor fills up, its voltage increases. Pin6 reads this voltage. When pin6 reads a voltage 2/3s greater than the power supply voltage, it opens pin7. When pin7 is open, the charge from the capacitor flows into it. While the capacitor is charging, pin3 goes high, which turns on the next part of my overall circuit, the relay circuit. While it’s discharging, pin3 goes low, turning it off. The time it takes for the capacitor to discharge is the time delay. This is the timing part of the overall circuit. I will make my R 10k and C 1000uf, because it will then create a time delay of 11 seconds. When the electricity goes into this part of my overall circuit, it creates a time delay for when the temperature is lower than its set time.

development Circuits, circuit 1


The relay switch has a magnetic coil in it. When its charged, it pulls the switch towards it, making my motor circuit turn on. The relay is an electrically controlled switch. The top pin is called the COM, the bottom right is the normally closed, and the bottom left is the normally open. The reason I have a diode around it, upside down, is because when the overall circuit is switched off, the relay switch lets out a surge of electricity called hach EUF, which can blow components. It’s due to the magnetism around it being released. With the diode in place, the surge goes into it, backwards, and balances the charge out, rather than through the circuit blowing components. This is my relay circuit; it turns on the motor when the current that meets the relay is high. The relay is in control of the motor circuit, the motor will not turn on, without the relay.





This is a slight variation of my circuit, instead of using an op amp, im using an and gate. It works exactly the same way as an op amp, but doesn’t use a variable resistor, meaning this circuit, although slightly easier, doesn’t meet my specification.

3 circuits ideas


This page shows:

Description of function+ system diagram


ProcessInput Output

Heat Time delay Motor

Thermistor 555Monostable MotorOp-amp

Comparitor

The first part of my circuit is a comparator circuit using a 741 op-amp. The thermistor at this part of my circuit detects heat, and when theres enough heat, the voltage above the thermistor increases and the comparator reads this and turns its output on, that’s connected to the 555 monostable. The monostable creates a time delay, and turns its output on, which is connected to a relay circuit. The relay will turn on the motor when electricity goes through it. With the motor on, the heat just needs to go down for the circuit to stop functioning.

Comparitor

Relay switch

Flow chart


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Is the thermistor high or

low?

Start

Monostable triggered

Out put at monostable high

Current flows through relay

Motor turns on

HIGH

LOW

Is thermistor high or low?

HIGH

LOW

Go to start

Time delay

Development of final circuitAfter testing my circuit, I realised that it only works

when I move the relay switch below the transistor, also, I had to change the values of a few resistors.


This page shows:

Circuit diagram with description of how it works.


Breadboard


I bread borded my circuit as seen above, to test if it was working properly physically as well as on circuit wizard. I had to move my relay switch below my transistor for my oveal circuit to work, and I had to change a few values for my resistors, but it was a success, because it did exactly what I wanted it to do.

PCB layout


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This is my PCB layout, its all packed up and condensed. Its three circuits on one board, all connected. Because of this, I’ve had to use three jumping wires.

3 case ideas


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Case development


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Final case design


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Plan of making


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Making in industry


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Social and environment issues


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Testing plan


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testing


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Evaluation 1


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Evaluation 2


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Evaluation 3


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