3. Step 1
Take the four lemons roll and
squeeze them on a bench top
to loosen the juices inside -
don't squeeze too hard. This
will cause the juices to
release from the pulp so you
can get a good "battery" for
your light bulb. Make sure
they get good and soft without
breaking the peals.
4. Step 2
Use a kitchen knife to cut
a penny-sized slit in all
four lemons. Insert a
penny halfway into each of
the four slits that you cut.
Push a zinc nail into each
of the lemons, opposite
the penny. Be sure you
don’t let the nail and
penny touch each other.
5. Step 3
The voltmeter will measure
the rate of electron flow. If
one connects the voltmeter
to the electrodes, a voltage
of 0.906 volts will be
detected. However, this is
not enough to light a bulb.
6. Step 3
The voltmeter will measure
the rate of electron flow. If
one connects the voltmeter
to the electrodes, a voltage
of 0.906 volts will be
detected. However, this is
not enough to light a bulb.
7. Step 4
Connect all four lemons
together with alligator
clips. Each set of
alligator clips should
connect a nail with a
penny.
8. Step 5
Attach the two loose
alligator clips to the
LED light. Finally! The
energy from the lemons
lights up the LED.