• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Design of a flash light. Even though this device is so simple but in this design there are four major problems:

Extracts from this document...

Introduction

A Poor Design: Flashlight A flashlight consists of a battery, a switch, and a lamp. Simply the switch (user control) and the battery are the inputs of this system and the light, and some heat, are the outputs. This circuit is then placed inside a case and a reflector is mounted at the back of the lamp to direct the light into the object. Figure1: Flash light shown from 4 different angles. The cubic shape of the flashlight makes it uncomfortable to carry. 1. The Problem: Even though this device is so simple but in this design there are four major problems: * Cubic shape of the flashlight * Poor choice of On/Off switch * Flat Reflecting mirror * Non-rechargeable and non-standard battery Shape: Maybe the most important characteristic that every flashlight must have is to be comfortable in hand. ...read more.

Middle

After a while your thumb gets tired and you may require to switch hands or even worse, keeping the light on will become a two hand operation such that one hand must hold the light and the other must push the switch. Reflector Mirror: the mirror used in this design is flat instead of being concave and it can not focus the light on desired object properly. Battery: The battery used in this device is not rechargeable nor it is one the standard type of batteries you can find in a store (such as AA or AAA). Instead there is a black cubic shape battery with no information written on it. ...read more.

Conclusion

Since the fingers tend to curl, it will be much easier to hold and carry around a cylinder compared to a cube. 3.2: Switch: It must not be a momentary switch. That is it must stay on without any need to keep pressure on it. 3.3: Reflector Mirror: It should be concave so that it can focus the light on desired object. Since the intensity of the light is not that much in this case we want to reflect all the light rather than letting it "waste" through the sides of the light bulb. 3.4: Standard Battery: Standard rechargeable battery must be used so we can recharge or change the battery if it dies. In addition, recharger handle can be added such that by rotating the handle the battery gets charged. ?? ?? ?? ?? ENSC 304: Assignment 1, January 29, 2008 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Design and Technology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

or


Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Design and Technology essays

  1. Were developing a shoe removal detector which identifies and notifies a person entering the ...

    Welcome message and shoe removal message. If the newcomer detector detects the presence of a visitor (True) it triggers the welcome message If the human skin detector detects the touch of feet (True) it triggers nothing. Say if a person is coming with shoes the unit will say a welcome message and a removal message.

  2. Design Principles and Appliction - Constraints

    On a large important job it will include drawings, perhaps a model, details of people involved, information on the site, design constraints, cost appraisals, the anticipated programme, together with schedules of the accommodation and room areas. To conclude on how the site can restrict construction project, the following questions should

  1. Free essay

    Systems Case Study

    Another source could be Encarta, Britannica but again like the Internet, these may be hard to reach and question in certain areas. I may also use certain books such as the laws of computer security, data protection act etc. Primary or secondary?

  2. Mind Design

    It will have both objects and a state of intention to the object which will be delivered to the reader. Like wise pictures and diagrams can be seen in the same light. Yet these are said not to have intention because they derive as second-hand intention from an intentional source

  1. Describe the benefits of technological developments in equipment and facility design in two contrasting ...

    Asics developed gel technology in their trainers nearly 20 years ago and it is still in their trainers today, the silicon gel attenuates the shock made on impact and works in conjunction with the lateral rear foot flex grooves within the sole to improve comfort.

  2. Computer Waste

    * CRT (cathode ray tubes) monitors: lead, plastic, glass, metal and barium * Tower (casing): thermoplastics and flame retardants, chromium * Floppy Disk Drives: lead and plastic * Lap-top Batteries: mercury, lead, lithium, cadmium, alkaline and manganese * Printed Circuit Boards: gallium, plastic, arsenic, precious metals, fiberglass, silicon, lead and

  1. Nano technology - Screen technology is a fast changing technology area.

    Improving sustainability and safety of industrial systems - Integrating nanotechnologies and new material into production systems will help introduce new designs and new ways of making things smaller, cheaper, better to run, fighting pollution and developing clean and less source intensive technologies.

  2. Uses For Polymers - my bullet proof vest design.

    the reporter may be harder to spot due to Block-Tex featuring camouflage in its clothing. 3) Reporters may survive if a b**b is set off or if they get shot at. This is due to its bullet-resistant compatibility. This is just the beginning of Block-Tex Chloride ? research and

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work