Lighting and Sign

Topics: Lighting, Light-emitting diode, Diode Pages: 6 (388 words) Published: June 25, 2013
Y11-PHY-2013-T2 Holiday homework
Investigation 4 (3%)

An LED sign is an illuminated sign made with LED, or light-emitting diode, light bulbs which produce little heat and are energy efficient. An LED sign is used in a shop window to attract the attention of potential customers, or as part of a decoration. For this holiday homework, you should complete the following requirements:

1. LED Sign:

Everyone should make an LED sign. A simple one containing a single series circuit is OK. You need to determine the materials to make the sign from and prepare them by yourselves. You can design your own symbol used in different ways.

2. A report:

Make a report to introduce the LED sign you make. The planning and report worksheet is attached, use it to finish you report. If you need to quote information from internet or other books, you must give the source of the information at the end of the report. And the original text from the reference can’t be more than 40%.

3. This task will take about 3% of your score for the 2A2B part (essay: 1%; LED sign: 2%).

4. You can hand in your report in either printed version or handwriting version.

5. Deadline: Tuesday, June 18th. If submitted later, the essay or LED sign will get only 70% of the original score.

Planning and Report Worksheet for Science Investigations

Student name_____________________________

Phase one: Planning

What sign are you going to make? It will be used in which way? Use a using a diagram to describe your sign.

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What do you know about LED from personal experience and from science?

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______________________________________________________________________ Describe the circuit of your design using a circuit diagram.

List the circuit components and other materials you will use when making this the LED sign.

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Are there any special safety precautions?

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______________________________________________________________________ Phase two: Experimenting

Carry out some...
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