Elenco Green Projects - Manual (Page 21)

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Project #14 Electric Circuit
Build the circuit shown and push
the press switch (S2) to turn on
red LED (D1).
Educational Corner:
Water Meter
Pump
Valve
Comparing Electric
Flow to Water Flow:
Electric Paths
Switch
LED
Batter
y
What is really happening here?
1.The battery (B4, containing a 3.6V rechargeable battery with protection
circuitry) converts chemical energy into electrical energy and “pushes” it
through the circuit, just like the electricity from your power company. A
battery pushes electricity through a circuit just like a pump pushes water
through a pipe.
2.The snap wires (the blue pieces) carry the electricity around the circuit,
just like wires carry electricity around your home. Wires carry electricity
just like pipes carry water.
3.The press switch (S2) controls the electricity by turning it on or off, just
like a light switch on the wall of your home. A switch controls electricity
like a faucet controls water.
4.The red LED (D1, a “light emitting diode”) converts electrical energy into
light; it is similar to lights in your home. An LED shows how much
electricity is flowing in a circuit like a water meter shows how fast water
flows in a pipe.
5.The base grid is a platform for mounting the circuit, just like how wires are
mounted in the walls of your home to control the lights.
See projects 1 & 3 if you need to
recharge the battery (B4).