Elenco Upgrade Kit SC500 to SC750 - Manual (Page 44)

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Project #594
OBJECTIVE: To create a pulsing motor circuit.
Pulsing Motor
Set the meter (M2) to the LOW scale. Turn on the slide switch (S1) and
now you have a pulsing motor and LED’s circuit. Replace the meter
with the 470
μ F capacitor (C5, “+” on right) to change the rate the LED’s
(D1 & D2) flash.
Project #593
OBJECTIVE: To create a sound circuit.
Noisemaker (III)
Turn the slide switch (S1) on and the speaker (SP) sounds as if a
motor is spinning and an alarm is running. The relay’s (S3) contacts
rapidly open and close the battery connection to the circuit causing the
alarm IC (U2) sound to be different.
!
WARNING: Moving parts. Do not touch the fan or
motor during operation. Do not lean over the motor.