2. Situation: A number of cooking operations are dependant upon some type of timing device to ensure that the food is prepared to the required standard. Design Brief: Design a contemporary ‘Egg Timer’ appropriate for a domestic environment; Identification & Analysis: An electronic system is required incorporating a timing device Some type of interesting product/casing design to house the electronics system and battery? An output device – light / audible tone? An Electronic Egg Timer

3. Recognition of Constraints: My design, communicating and manufacturing capability, knowledge and skills; The type of manufacturing processes available; Materials accessible; Tools, machines and equipment; Function and ease of use Hygiene – ease of cleaning Location of PCB and battery An Electronic Egg Timer

4. Investigation & Research: Design inspiration!! Where do I start?Where do I start? Observe and analysis existing timers – mechanical, electrical - reverse engineering; Research for ideas – internet, magazines, books etc Reference to existing ideas or stimuli should demonstrate how these materials have influenced your thinking around the problem or stimulated the thought process / ideas? Designing using Mood Boards & reference materials An Electronic Egg Timer

5. Design Opportunities: Designing for Manufacturing 1.How will the parts fit together? 2.How will the PCB be mounted? 3.How will the battery be mounted securely and accessed? 4.How will the potentiometer be located? 5.How will the base be fitted? 6.How will the time be registered? 7.What type of output device will be required and where will it be located? 8.How can we include detail into the design to enhance the aesthetics?

6. An Electronic Egg Timer Suggested transistor Timer Circuit No. 39 from 112 Working Circuits Research circuit No. 40 for alternative output !

7. An Electronic Egg Timer Suggested 555 Timer Circuit No. 37 from 112 working circuits Research circuit No. 38 for off for a period!

8. An Electronic Egg Timer Design a former from any one of the given block shapes that is appropriate for the vacuum forming process. The form should be suitable as a casing design for an Egg Timer. Designing for Manufacture:

9. An Electronic Egg Timer Suggested Idea 1

10. Former turned on the Wood Lathe Vacuum formed using rigid polystyrene sheet An Electronic Egg Timer Suggested Idea 2

11. An Electronic Egg Timer Internal egg rack Show sketches of your ideas for a base?

12. An Electronic Egg Timer

13. A semi-sphere may be used as a basic geometrical shape for vacuum forming. This casing will house the electronic PCB and battery. Design an interesting feature that could be located to the base to show the different time delays.

14. An Electronic Egg Timer Using graphics or model using CAD, to sketch different ideas for a feature which would add to the aesthetics - of this basic design; Pictorial viewFront view Suggested Idea 3

15. An Electronic Egg Timer How will the PCB & Battery be mounted? Contemporary kitchen timers

16. An Electronic Egg Timer Inspiration! How will part (A) fit-into part (B)? How & where will the potentiometer be fitted?

17. An Electronic Egg Timer Suggested Idea 4

18. An Electronic Egg Timer potentiometer base Fitting the potentiometer?

19. An Electronic Egg Timer Suggested Idea 4 developed

20. An Electronic Egg Timer Suggested Idea 5

21. An Electronic Egg Timer Suggested Idea 6

22. An Electronic Egg Timer Suggested Idea 6 fabricated in acrylic plastic

23. An Electronic Egg Timer Suggested Idea 6 fabricated in wood

24. An Electronic Egg Timer Suggested Idea 7 fabricated

25. An Electronic Egg Timer Male and female former Outcome after trimming Acrylic sheet heated in the oven and press-moulded Press Moulding

26. An Electronic Egg Timer Finished & assembled

27. An Electronic Egg Timer Suggested Idea 8 fabricated

28. An Electronic Egg Timer

29. PCB, printed circuit board How will the pcb be mounted?