What Is a Circuit?Using BatteriesBuilding a Lamp CircuitProject 1: A Simple Lamp CircuitWorking with SwitchesBuilding a Switched Lamp CircuitProject 2: A Lamp Controlled by a SwitchUnderstand Series and Parallel CircuitsBuilding a Series Lamp CircuitProject 3: A Series Lamp CircuitBuilding a Parallel Lamp CircuitProject 4: A Parallel Lamp CircuitUsing Switches in Series and ParallelBuilding a Series Switch CircuitProject 5: A Series Switch CircuitBuilding a Parallel Switch CircuitProject 6: A Parallel Switch CircuitSwitching between Two LampsProject 7: Controlling Two Lamps with One SwitchBuilding a Three-Way Lamp SwitchProject 8: A Three-Way Light SwitchReversing PolarityProject 9: A Polarity-Reversing Circuit