Crank Motor

Project Number: 26

Description: Build the circuit shown. Set the meter (M6) to the 50mA setting. Push the press switch (S2) and watch the current on the meter when the hand crank (HC) spins. Compare the current with it to the current when using the motor (M4) and other parts.

Snappy: The hand crank is a motor with a gearbox attached. The gearbox spins the crank handle slower but with more force than when the motor shaft is spinning. The slow-spinning crank may look boring compared to the fast wind fan on the M4 motor, but using a gearbox allows a low-power motor to move heavier objects than they normally could.