Elenco Upgrade Kit SC500 to SC750 - Manual (Page 56)

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Project #623
OBJECTIVE: To build an AM radio with LED’s.
AM Radio
with Power LED’s
Set the adjustable resistor (RV) to the middle position and turn the slide
switch (S1) on. Tune the radio by adjusting the variable capacitor (CV).
The LED’s (D1 & D2) flicker as the sound is heard.
Project #624
OBJECTIVE: To record the sounds from the space war IC.
Space War IC
Recording
The circuit records the sounds from the space war IC (U3) into the
recording IC (U6). Turn on the slide switch (S1) and the first beep
indicates that the IC has begun recording. When you hear two beeps,
the recording has stopped. Turn off the slide switch and press the
press switch (S2). You will hear the recording of the space war IC
before each song is played. The lamp (L2) is used to limit current and
will not light.
Place the 2-snap from points A & B onto C & D. Now record a different
sound from U3.