Snap Circuits 750-in-1 Manual

Project #652
OBJECTIVE: To add LED’s to a stepper motor circuit.
Stepper Motor with
Lamp & LED’s
The circuit works the same as project #631 except now the green LED
(D2) lights when the motor (M1) and bulb (L1) are off. Set the
adjustable resistor (RV) to the middle position. Turn the slide switch
(S1) on, the motor spins, the bulb lights, and then turn off as the green
LED lights. Even though the motor is connected to the LED, it will not
spin because the series resistor limits the current.
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Project #653
OBJECTIVE: To drive the motor and display with two IC
modules.
IC Start & Stop
Turn the slide switch (S1) on. As the output from the IC (U2) drives the
transistor (Q1), the motor (M1) spins and the display (D7) lights the
letter “S” and then turns off.
!
WARNING: Moving parts. Do not touch the fan or
motor during operation.