DO / HAPPEN & Essential

Essential components are wires and batteries - each circuit you build will need these components.

DO components are all of the switches, the potentiometer, and the photo cell.

HAPPEN components consist of the lightbulb, LEDs, motor, and buzzer.

We ask a simple question:

"What do you DO to make HAPPEN?"

For example, "I flip the switch to make the motor spin" or "I turn the potentiometer to adjust the brightness of the LED."

You can see how answering this question categorizes each component and its function into DO and HAPPEN. This will help you understand the cause and effect of how things work in a circuit system. This will also help you name and wonder about many more complicated relationships inside systems. Later in learning, DO will translate to the engineering concept of INPUT and HAPPEN will translate to the engineering concept of OUTPUT.


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