Moving Voltage

Project Number: 36

Description: Build the circuit shown and set the meter (M6) to the 5V setting. Place the wind fan on the motor (M4). Set the slide switch (S5) to position B. The red LED (D1) lights, the fan spins, and the meter shows the voltage across the motor. You may need to give the fan a push to get it started. The voltage produced by the battery is spilt between the motor and the LED. Push the press switch (S2). The LED turns off, the motor speeds up, and the meter shows a higher voltage across the motor. With the press switch on, the full voltage from the battery is available in the motor because the LED is bypassed.

Snappy: Switches are used to move voltage around a circuit.