Voting Machine





Name of Activity Voting Machine
Author Daniel Meer (Elissa Milto)
Keywords gear ratios, gears, simple machines, voting machine, slowly oscillate, button, motor, arm, meshing
Subject Simple Machines
Grade Level K, 1, 2, 3, 4, 5, 6
Time 1 Hour Total
Brief Description Using what you know about gear ratios, take the motor from the simple machine kit and
build a voting machine using at least 2 gears. The arm should slowly oscillate to choose
between the two presidential candidates (or chicken and egg- what came first?) when you
press the button on the motor. The arm can be either vertical or horizontal as well as the icon
that it will point to.
Lesson Objectives: - gears-controlled motor movement

-practical lego use

-critical thinking (building objectives)

Materials Needed: - Simple Machine Kit- paper and pen
Preparation and Set Up: Show that the arm should point to a logo or icon as in a gas gauge in your car points to empty or full. The arm should slowly oscillate between the two when the motor is activated in either direction.
Necessary Background Vocabulary:
Gear Ratio
Procedure make students draw out plan for voting machine with which gears the arm and motor will attach to. let them build it. test it.

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