Elenco R/C Snap Rover&reg - Manual (Page 16)

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Project #11
OBJECTIVE: To build a circuit with sound and light.
Sound & Light
OBJECTIVE: To show how capacitors store electrical charge.
Electricity Bank Project #12
Build the circuit, place the base grid centered on the
Rover body, and connect the jumper wires as
shown. Turn on the switch (S1) and electricity flows
from the batteries through the circuit. The horn (W1)
converts electricity into sound and the LED•(D4)
converts electricity into light. The four 1K
Ω resistors
(R2) are connected in parallel, to act as a 250 Ω
resistance.
Build the circuit and connect the jumper wires,
leaving one end of the green jumper off as shown.
Touch the loose end of the green jumper to point A
on the 3-snap wire for a moment. The horn (W1)
makes noise while the 100
μF capacitors (C4N) fill
up with electricity.
Now move the green jumper from point A to point B
on the 2-snap wire. The LED•(D4) lights for a few
seconds using the electricity stored in the
capacitors. Move the green jumper back to A to refill
with electricity, and then to B several times.
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