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Casio EA-200 User's Manual

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20020601

English

Activity: SetupActivity: Setup

2-14-1

쐽 Equipment

Solar Cell Panel (Operating Voltage: 5V max.) Magnetic Compass

Rain Cover Wood Block

Voltage Measurement Setup (EA-200, graphic scientific calculator, data communication

cable, voltage probe)

Optical Measurement Setup (EA-200, graphic scientific calculator, data communication

cable, optical probe)

쐽 Preliminary Setup

u Standing in a location that is exposed to sunlight, hold the equipment in your hands and

point the solar cell panel and optical probe towards the sun.

쐽 Setting Up

u Fix the optical probe and solar cell panel so they are pointing in the direction and at the

angle you determined during the preliminary measurement.

This activity studies how change in the amount of sunlight available per day affects the

electromotive force of a solar cell, with a view to understanding the characteristics of power

generation by a solar cell.

Solar cells have been receiving a great deal of attention in recent years as one source of

renewable, environmentally-friendly energy. One problem with solar cells, however, is the

fact that the amount of power that can be generated is unstable, because the quantity of

sunlight hitting the solar cell panel surface is affected by weather and other factors. In order

to maximize power generation efficiency, it is necessary to design a system that is able to

change the orientation of the solar cell panel to suit changes in the angle of the sun due to

the rotation and revolution of the Earth, and seasonal changes. The diagram below shows

the optimum orientation of a solar cell panel in relation to the sun.

In spite of the above, most solar cell panels are pointed in a fixed direction, because it costs

too much to be continually changing their orientation. With this activity, we will investigate

the correlation between the amount of sunlight per day picked up by a fixed solar cell panel

and the electromotive force of a solar cell.

Sunlight and Solar Cells

Theory

1 Sun

2 Morning

3 Afternoon

4 Evening

5 Solar Cell Panel Surface

6 Magnetic Compass

θ

(°): Angle of Inclination

1 Sun

2 Solar Cell Panel

3 Voltage Probe

4 Optical Probe

5 Angle adjustment

block

6 Transparent Rain

Cover

7 CH1

8 CH2

9 EA-200

1 Solar Cell Panel

2 Voltage Probe

(CH1)

3 Optical Probe

(CH2)

4 EA-200