Data Sheet

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Project 109
Mirror Ball Speed Control
Build the circuit and turn on the
slide switch (S1). The mirror
ball spins and three LEDs light.
Push the press switch (S2) to
make the mirror ball spin faster.
Use the preceding circuit, but remove any one or
two of the LEDs (D9, D11, and D12).
Next, add the lamp (L4) in place of one of the
removed LEDs. Compare the mirror ball speed.
Project 110
Mirror Ball Speed
Control (II)
Use the project 109 circuit,
but replace one of the LEDs
with the clear motor (M4)
and fan. Compare the mirror
ball speed.
Next, remove another of the
LEDs and compare the
mirror ball speed.
Project 111
Mirror Ball Speed
Control (III)
Use the project 109 and 110
circuits but replace the
orange motor (M9) and
mirror ball with the clear
motor (M4) and fan.
Compare the fan speed as
you push the press switch
(S2) or remove one or two
LEDs.
Project 112
Fan Speed
Control
Use the project 109 and 110
circuits but replace the
orange motor (M9) and
mirror ball with the clear
motor (M4) and illusion card
holder, with one of the
illusion cards in it. Compare
the image on the spinning
illusion card as you vary the
spin speed.
If the illusion card comes out
at high speed then insert a
small piece of paper into the
cardholder with the illusion
card to make it fit more
snugly.
Project 113
Illusion Card
Speed Control
The lamp has low
resistance, so adding it
will be similar to pushing
the press switch (S2).
All the electricity flowing
through the orange motor
(M9) splits up between the
three LEDs. The press switch
speeds up the orange motor
by bypassing the LEDs.
SC-3DMEG_Manual.qxp_SC-3Di_Manual_060816 6/19/17 7:33 PM Page 69