Elenco R/C Snap Rover&reg - Manual (Page 15)

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Project #9
OBJECTIVE: To show how capacitors slow things down.
Build the circuit, place the base grid on the
Rover body, and connect the jumper wires as
shown. Turn the swtch (S1) on and the LED is
on. Turn the switch off, and the LED•goes out
slowly. Electricity stored in the 100
μF capacitors
(C4N) keeps the LED•on after the batteries have
been disconnected.
If you remove one of the capacitors then the
LED will turn off faster, because you aren’t
storing as much electricity. If you remove both
capacitors, the LED will turn off immediately
when the switch is turned off.
Slow Turn-Off
Project #10
OBJECTIVE: To compare types of circuits.
Series Capacitors
This is the same circuit as project 9, but with the
capacitors connected differently. Build the circuit
and connect the jumper wires as shown. Turn
the switch on and off, and watch how quickly the
LED turns off.
The LED doesn’t stay on as long with this circuit
than it did in project 9, because two capacitors
connected in
series store less electricity than
just one. This may seem like a bad way to
connect capacitors, but it allows them to be
used with higher voltages.
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