This example was tested on 28BYJ-48 stepper motor with ULN2003 driver. Specifications of the motor are as follows:

Operating Voltage: 5V DC (most common) or 12V DC.
Motor Type: 5-wire Unipolar (4-phase).
Gear Reduction Ratio: 1:64.
Step Angle: 5.625/64 (approx. 0.088deg per step)
Steps per revolution: 4090.90 approx.

Pinout and Wiring of ULN2003
Red: VCC (+5V)
Orange: Input 1 (IN1)
Yellow: Input 2 (IN2)
Pink: Input 3 (IN3)
Blue: Input 4 (IN4
