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10
Project #1 Electric Light & Switch
OBJECTIVE: To show how electricity is turned “ON” or
“OFF” with a switch.
Project #2
Build the circuit shown on the left by placing all the parts with a black 1
next to them on the base grid rst. Then, assemble parts marked with a 2.
When you close the slide switch (S1), current ows from the batteries
(B1) through the motor (M1) making it rotate. Place the fan blade on the
motor shaft and close the slide switch. The motor will rotate forcing the
fan blade to move air past the motor.
In this project, you changed electrical power into mechanical power. DC
motors are used in all the battery powered equipment requiring rotary
motion, such as a cordless drill, electric toothbrush, and toy trains that
run on batteries just to name a few. An electric motor is much easier to
control than gas or diesel engines.
DC Motor & Switch
OBJECTIVE: To show how electricity is used to run a Direct
Current (DC) Motor.
Build the circuit shown on the left by placing all the parts with a black 1
next to them on the base grid rst. Then, assemble parts marked with a 2.
Install two (2) “AA” batteries (not included) into the battery holder (B1).
When installing a battery, be sure the spring is compressed straight
back, and not bent up, down, or to one side. Battery installation
should be supervised by an adult.
When you close the slide switch (S1), current ows from the batteries
through the lamp and back to the battery through the switch. The closed
switch completes the circuit. In electronics this is called a closed circuit.
When the slide switch is opened, the current can no longer ow back to
the battery, so the lamp goes out. In electronics this is called an open
circuit.
You may have received a 3V lamp instead of a 2.5V lamp or socket, this
will not affect any of your circuits.
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Placement Level
Numbers
Placement Level
Numbers
!
WARNING: Moving parts. Do not touch the fan or
motor during operation. Do not lean over the motor.
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