Elenco Deluxe Snap Rover&reg - Manual (Page 32)

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Project #41 Two Tone Flash
Project #40
OBJECTIVE: To learn about electric current.
Current Diverter
Build the circuit and connect the jumper wires as
shown. Turn on the remote control unit and extend
the antenna. Turn on the right slide switch (S1) and
hold down the right button on the remote control
unit; you hear a tone (it may be prceded by a
recording).
Turn on the left slide switch to change the tone and
light the white LED (D4). If you replace the 1K
Ω
resistor (R2) with any of the other resistors then the
tone will be a little different.
If you connect the white, yellow, green, and purple
jumper wires between the deluxe receiver (RX2)
and the Rover rear then you can use the remote
control levers to drive Rover around.
OBJECTIVE: To change sound using remote control.
Build the circuit and connect
the jumper wires as shown.
Turn on the remote control
unit and extend the antenna.
Turn on the slide switch (S1)
to hear a tone. Press the right
button on the remote control
unit to change the tone and
light the white LED (D4).
If you connect the white,
yellow, green, and purple
jumper wires between the
deluxe receiver (RX2) and the
Rover rear then you can use
the remote control levers to
drive Rover around.
+
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R
O
VER REAR
R
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VER REAR
Turning on the left switch
changes the sound
because a resistor inside
RX2 limits the current.
The current paths
through U9 and D4 both
lead into RX2, so turning
on the D4 path reduces
the current in the U9
sound-making path.