Elenco Upgrade Kit SC500 to SC750 - Manual (Page 28)

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Project #555
OBJECTIVE: To compare the voltage of the solar cell to the
battery.
Solar Cell vs. Battery
Set the meter (M2) to the LOW (or 10mA) scale. Press the press
switch (S2) and set the adjustable resistor (RV) so that the meter
reads “5”, then release it.
Now turn on the slide switch (S1) and vary the brightness of light to the
solar cell (B2). Since the voltage from the batteries (B1) is 3V, if the
meter reads higher than “5”, then the solar cell voltage is greater than
3V. If the solar cell voltage is greater and you have rechargeable
batteries (in B1), then turning on both switches at the same time will
use the solar cell to recharge your batteries.
Project #556
OBJECTIVE: To compare the voltage of the solar cell to the
battery.
Solar Cell vs. Battery (II)
Set the meter (M2) to the LOW (or 10mA) scale. Turn on the slide
switch (S1) and vary the brightness of light to the solar cell (B2). If the
meter reads zero, then the battery voltage is higher than the voltage
produced by the solar cell.
If the meter reads greater than zero, then the solar cell voltage is
higher. If the batteries are rechargeable then the solar cell will
recharge them until the voltages are equal.
To learn more about how circuits work, visit www.snapcircuits.net or page 85 to find out about our Student Guides.