Tape the positive end of the piezo to
the negative pin on the LED.
Tape a small piece of hookup wire,
approximately 4″, to the negative end of the
Tape the positive side of the coincell to
the positive pin on the LED. Tape a slightly
larger piece of hookup wire, approximately
6″, to the negative side of the coincell.
Cut your index card to cover most of
the inside bottom of your basket, without
getting wedged in.
Cover one side of the card with copper
Cover the bottom of the basket with
copper tape, too.
Cut an LED-sized hole near the top of
Poke two wire-sized holes through
the backboard and into the left side and the
right side of the basket, near the bottom of
Push the LED through the hole that
you made at the top.
Tape the battery and piezo to the back
of the backboard
Push the two pieces of hookup wire
through the two wire-sized holes.
Using the copper tape, attach one
hookup wire to the copper side of the index
card and the other hookup wire to the
copper on the bottom of the basket
Tape the index card just above the
bottom of the basket on just one of its long
sides, inside of the basket. The hookup wire
will act as a spacer between the two plates
Drop something heavy, like a marble,
into the basket to hear the buzzer go off!
If your ball isn’t heavy enough to push the
copper pieces together, maybe 3 will do the
job. Then it’s a game like “Get 3 in to win!”
or however many marbles it takes to set off
the LED and buzzer.
Your safety is your own responsibility, including proper use of equipment and safety gear, and determining whether you have adequate skill and experience. Power tools, electricity, and other resources used for these projects are dangerous, unless used properly and with adequate precautions, including safety gear and adult supervision. Some illustrative photos do not depict safety precautions or equipment, in order to show the project steps more clearly. Use of the instructions and suggestions found in Maker Camp is at your own risk. Maker Media, Inc., disclaims all responsibility for any resulting damage, injury, or expense.