Datasheet-1

Project 88 2-Way Circuit
Build the circuit, set the meter (M5) to the 1A setting, place the iron core
rod in the electromagnet (M3), and place the fan on the motor (M1). Set the
switcher (S6) to the left or right to make electricity flow through the lights,
motor, and electromagnet in opposite directions. The compass measures
the magnetic field from the electromagnet and the meter measures the cur-
rent from the batteries. Set the switcher to the middle position to shut off
the circuit.
A lamp is connected in series with the motor to slow down the motor; if you
replace the lamp with a 3-snap wire then the fan may fly off.
For each component, select how they work when the electricity is reversed:
LED: A. 1 direction only B. effects unchanged C. effects reversed
Lamp: A. 1 direction only B. effects unchanged C. effects reversed
Motor: A. 1 direction only B. effects unchanged C. effects reversed
Electromagnet: A. 1 direction only B. effects unchanged C. effects reversed
!
WARNING: Moving parts. Do not
touch the fan during operation.
!
WARNING:
Do not lean
over the motor.
1A
Project 89 Electromagnet Music
Build the circuit, set the meter (M5) to the
5V setting, and turn on the slide switch
(S1); you hear a buzzing sound as the
relay (S3) turns on and off rapidly. Adjust
the sound by raising and lowering the iron
core rod to different heights in the electro-
magnet (M3), to make music. The meter
shows how the voltage is changing.
5V
-74-
SC_STEM1_manual_PRINT.qxp_Layout 1 7/13/17 4:45 PM Page 75