Elenco Circuit Maker Skill Builder 125 - Manual (Page 15)

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Project #8 Rotate & Roar
Project #7
Build the circuit shown on the left, but leave the fan off the motor (M1).
When you turn on the slide switch (S1), the music may play for a short
time and then stop. After the music has stopped, spin the motor with
your fingers. The music should play again for a short time, then stop.
Now replace the 100W resistor (R1) with a 3-snap wire, and notice how
the sound is affected.
In this project, you changed the amount of current that goes through
the speaker (SP) and increased the sound output of the speaker.
Resistors are used throughout electronics
to limit the amount of current that flows.
Build the circuit shown on the left which is the same as the circuit in
Project #2 but with the motor part reversed. Place the glow fan on the
motor.
Turn on the slide switch (S1), wait for the motor to reach full speed,
then turn off the switch. This time, the glow fan does not fly because
the fan is now rotating in the opposite direction such that the airflow is
pushing the fan downward.
Stick Around Saucer
!
WARNING: Moving parts. Do not touch the fan or
motor during operation.
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CM-125_Manual_031514.qxp_CM-125_Manual_031514 4/2/14 12:19 PM Page 15