Elenco Upgrade Kit SC500 to SC750 - Manual (Page 75)

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Project #668
OBJECTIVE: To show how electricity can lift things using
magnetism.
Photoresistor
Paperclip Suspension
Project #669
OBJECTIVE: To show how electricity can lift things using
magnetism.
Paperclip Oscillator
Take a paperclip and straighten it out, bend it in
half, and place it into the electromagnet (M3)
center. Turn on the slide switch (S1), and set the
adjustable resistor (RV) control lever to the right.
The paperclip gets sucked into the center of the
electromagnet and stays suspended there. Move
the adjustable resistor lever to the left, and the
paperclip falls.
Now for the fun part: Slowly slide the adjustable
resistor lever until you find a spot where the
paperclip is bouncing up and down. There will be
a clicking sound from the relay (S3).
Take a paperclip and straighten it out, bend it in half, and place it into
the electromagnet (M3) center. Turn on the slide switch (S1), the
paperclip gets sucked into the center of the electromagnet and stays
suspended there.
Now move the adjustable resistor (RV) control lever around while
waving your hand over the photoresistor (RP). Depending on the
adjustable resistor setting, sometimes covering the photoresistor
causes the paperclip to fall and sometimes it doesn’t. You can also
adjust the light to set the paperclip to different heights.
Drop in
Straighten and
bend paperclip
Drop in
Straighten and bend paperclip