Elenco R/C Snap Rover® - Manual (Page 18)

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Project #15
OBJECTIVE: To compare types of circuits.
When More Are Less
Project #16
OBJECTIVE: To compare types of circuits.
When More Are More
Build the circuit and connect the jumper wires
as shown. The LED•(D4) will be on but the
resistor is limiting the electricity through it.
Turn on the switch (S1) to place three other
resistors in
parallel with the first one. This
increases the flow of electricity to the LED, and
makes it brighter. Placing other resistors in
parallel reduces the total resistance (to 250
Ω
here), so more are less.
Build the circuit and connect the jumper wires as
shown. The LED•(D4) will be on but the four
resistors are limiting the electricity through it.
Turn on the switch (S1) to bypass three resistors
that are in
series with the first one. This
increases the flow of electricity to the LED, and
makes it brighter. Placing other resistors in
series increases the total resistance, so more
are more.
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