Project #628, Stepper motor, Project #629 – Elenco Projects 512-692 User Manual
Page 58: Crazy music ic
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Project #628
OBJECTIVE: To build a variable stepper motor.
Stepper Motor
Adjust the adjustable resistor (RV) to the middle position and turn on
the slide switch (S1). As the circuit oscillates, the motor (M1) moves a
short distance as the speaker (SP) sounds. Adjust the adjustable
resistor to different positions seeing how it affects the motor and
speaker.
Project #629
OBJECTIVE: To change the sound of the music IC.
Crazy Music IC
Set the adjustable resistor (RV) to the far left position and turn the slide
switch (S1) on. The relay’s (S3) contacts open and close shorting U1
to ground, causing the sound level to change.
!
WARNING:
Moving parts. Do not touch the fan or
motor during operation. Do not lean over the motor.
To learn more about how circuits work, visit www.snapcircuits.net or page 85 to find out about our Student Guides.