27964 Parallax Inc, 27964 Datasheet - Page 2

• Manufacturer Part Number: 27964
• Description: UNIPOLAR STEPPER MOTOR 12VDC
• Manufacturer: Parallax Inc

Specifications of 27964

• Accessory Type: Unipolar Stepper Motor
• For Use With/related Products: BASIC Stamp®
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: M425P-5

Stepper Basics
Control of a stepper motor comes from applying a specific step sequence; rotational speed is controlled
by the timing of the applied steps.
The simplified diagrams below illustrate the effect of phase
sequencing on rotational motion.
Full Step, Low Torque
Full Step, High Torque (standard application)
Half Step (best precision):
Circuit Connections
Use the circuit below to connect a 4-phase unipolar stepper motor to a BASIC Stamp or Javelin Stamp.
The ULN2803 may also be used and has enough driver circuits to control two stepper motors (be sure to
verify motor current requirement versus ULN2x03 sink capability for multiple outputs).
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© Parallax, Inc. • Unipolar Stepper Motor (#27964) • 02/2006