Lamp & Fan in Parallel

Project Number: 6

Parts Needed For Circuit: B1, 4, L1, M1, Fan Blade, 3, S1, 2, 2, 2, 2, 2

OBJECTIVE: To show how an indicator light can be connected without affecting the current in the motor.

Description: Build the circuit shown on the left. When you close the slide switch (S1), both the fan and the lamp (L1) should turn on. The fan will take a while to spin due to inertia. In this connection, the lamp does not change the current to the motor (M1). The motor should start a little faster than in Project #5. Remove the fan and notice how the lamp does not change in brightness as the motor picks up speed. It has its own path to the battery (B1).