Two in Series

Project Number: 51

Description: Set the switch (S5) to position B, the red LED (D1) lights and the horn (W1) sounds. Current flows from the battery through the LED and the horn back to the battery through the switch. The closed switch completes the circuit. In electronics this is called a closed circuit. When the switch is set to "C", the current can no longer flow back to the battery, so the LED goes out and the horn stops making noise. In electronics this is called an open circuit.

Snappy: [Not Talking]