Elenco Upgrade Kit SC500 to SC750 - Manual (Page 29)

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Project #557
OBJECTIVE: To use the sun to make music.
Solar Music
Set the meter (M2) to the LOW (or 10mA) scale. With the slide switch
(S1) off, make sure you have enough light on the solar cell (B2) for the
meter to read 7 or higher. Now turn on the slide switch and listen to
the music. When it stops, clap your hands and it should resume.
The meter is used to measure if the solar cell can supply enough
current to operate the music IC (U1).
Project #558
OBJECTIVE: To use the sun to make sounds.
Solar Sounds Combo
Set the meter (M2) to the LOW (or 10mA) scale. With the slide switch
(S1) off, make sure you have enough light on the solar cell (B2) for the
meter to read 9 or higher. Now turn on the slide switch and listen to
sounds from the alarm (U2) and space war (U3) IC’s. Wave your hand
over the photoresistor (RP) to change the sounds.
The meter is used to measure if the solar cell can supply enough
current to operate the alarm and space war IC’s. This project needs
more light than project #557, since two IC’s are used here.