Snap Circuits 750-in-1 Manual

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Project #591
OBJECTIVE: To use AC voltage.
AC Voltage (III)
This project is similar to project #589. When the slide switch (S1) is
turned on, the relay (S3) sounds and the light bulbs (L1 & L2) and
LED’s (D1 & D2) flash. Now when the press switch (S2) is pressed,
the speaker (SP) also sounds.
Project #592
OBJECTIVE: To create a sound circuit.
Noisemaker (II)
Turn on the slide switch (S1) and the relay (S3) generates a buzzing
noise. Increase the voltage across the relay by pressing the press
switch (S2). The tone changes because the relay’s contacts are
opening and closing faster.
!
WARNING: Moving parts. Do not touch the fan or
motor during operation.
!
WARNING: Do not lean over the motor.