Electronics/Materials On-going Development & Investigation

Materials HIP- tough, rigid, thermo plastic. It will work in my project because it is easy to shape it will hold the ps3 and it is cheep PVC- cheap, durable, thermo plastic. It will work in my project because it is easy to shape it will hold the ps3 and it is cheep Acrylic-strong, durable, light, thermo plastic. It will work in my project because it is easy to shape it will hold the ps3 and it is light ABS-strong, durable thermo-plastic so recyclable. It will work in my project because it is easy to shape and will hold the ps3s weight Conclusion on this page I learnt that there are a lot different thermo plastics and will be easy to shape all the plastics will come in different colours so I will be able to get the right one. I think PVC or acrylic will be the best to use

Manufacturing techniques Laser cutting easy to create box shapes will be difficult to create other shapes leaves minimal waste Vac forming can create a variety of shapes however has to be a certain size and produces a lot of waste and moulds have to be made Injection moulding can make lots of shapes with minimal waste however moulds have to be made and the plastic has to be melted Conclusion I think I should use a mix between vac forming and laser cutting as they are the most convenient and will work for my design

Electronic Investigation/ Circuit Research I have decided to use this pre- manufactured kit from Kitroniks Represents motion sensor Circuit diagram

CAD Modelling This is he sides to my finished product. The sides fit perfectly. The grill that you can see on the top left of one of the sides is where the speaker will go and I have cut another grill out on the opposite side of the product because I have 2 speakers. This is one side with the grills in close up. The rectangles that are joined up are the ones being cut out and it leaves thick lines with holes in-between.

components Low inertia motor x 4 to power the fans also its small enough to fit inside the case Rectangular rocker switch so I can turn the hole thing on or of when not being used 5v colour changing LED to make it look more stylish Thermistor so the fans come on when the playstation gets too hot so they will only be on when they need to be 12V UK mains wall power supply in order to supply enough power to my product in order to make it work CONCLUSION On this page I researched and found out what would be the best components to use

Investigation in electronics Light switch project board This is a light activated circuit board that is available from kitronik. It turns on when it goes dark. I could use this in my product. It includes all the components that are needed. This board only acts as a light switch and will need to be connected to a project board Power boost To boost the power so I can run more leds of the light switch board. The processor chip is not included, but I can use one from school. Forward voltage drop: 3.3 V Viewing angle: 140 degrees Max forward current: 30 mA Luminous intensity: 3000 mCd Lens types: Water clear White 5mm wide angle LED This is information about the LEDs that I will be using 4 x 1Kohm resistors 3 x 10Kohm resistors 1 x 22Kohm resistor 1 x red low current LED 1 x green low current LED 1 x yellow low current LED 1 x BC337 NPN transistor 2 x PCB mount switches 1 x 3.5mm PCB mount jack socket 6 x two way terminal blocks 1 x 8 pin IC holder 1 x PP3 clip lead 1 x 3AA battery holder 1 x PIC development board PCB The pack includes: I am using ultra bright LEDs so they are bright enough to light up the desk. They are the wide angle LEDs so they light up a larger area. 1 x 47Kohm potentiometer 2 x BC337 NPN transistors 1 x miniature LDR (light dependent resistor) 1 x 220ohm resistor 1 x light activated switch PCB The pack includes: This shows what components/circuit boards will be in the project, thus giving an idea for how large I will need to be to fit the circuits in.

Development of final design Joining of the plastic I will use finger joints on the laser cutter for the joints on this design. This shows finger joints in use. They can be used to join all sorts of shapes together. This is a close-up of a finger joint. It shows how the fingers interlock into each other giving more surface area for glue and a tight fit. This is often used in woodwork. Stage 1Stage 2Stage 3 I drawn this on Google sketch up to show how the fingers interlock to fit together. It shows how the fingers on one side have to be the exact opposite of the one opposite to it on the other side in order for it to fit together. LDR (light dependent resistor)/ photoresistor This image shows the shape of an LDR. LDR symbol The resistance of a LDR is usually high unless you illuminate it. It will detect the light and resistance will drop. This means they can be used in light sensor circuits for streetlights. Battery cover Cover that opens. Cover fixed by a pivot through a hole. Finger joints cut on the laser cutter This shows how the top hinges open witch in my model would reveal the batteries. Magnet to keep the door shut would be put here. I used a model from school to show the battery cover This shows where the batterie pack is located. The digital clock would be a pre- manufactured digital watch taken out the watch and put into my product.

Items cost list This is the list I produced for items that need to be brought to make my product. It also shows the cost of each item and the total cost to ensure the price for materials does not exceed the budget. The Perspex sheet it the most expensive peace, however the product could not be made without it. Using the total cost of the materials I work out the final price will be about £15. this will give me an idea of how much it will cost evenually.