5. Resistors in series

  1. You’re going to build a circuit with components and resistors in series. You will see that adding resistors in series restricts airflow to these components.
  2. Build the breadboard setup.
  3. Turn on the pump and observe the flag with 1 and with 2 resistors (0.5mm) in series. Notice how the flag flaps less powerfully when you add more resistors.
  1. Now replace the flag with a diode. When the diode lets air through, it whistles.
  2. Notice how to sound of the diode becomes less powerful when you add resistors in series. The pitch (how high the tone is) also drops.