12V Stepper Motor + ULN2003 Drive Module Board - (AD45042)

Description:

This is a stepper motor, good for small projects and experimenting with stepper motors. This unipolar motor has an integrated mounting plate with two mounting holes. It has 32 steps (11.25 degrees) per revolution, and inside there's a 1/16 reduction gear set. (It's actually 1/16.032, but for most purposes, 1/16 is a good enough approximation). What this means is that there are actually 32 * 16.032 steps per revolution = 513 steps. The shaft is flattened, so it's easy to hold with a setscrew. A perfect first stepper motor and works well with the Motor Shield for Arduino.

The gearing has some side effects that are important to note. First, you can turn the stepper by hand but not as smoothly as an un-geared stepper. It also means you should not use interleaving or micro-stepping to control or it will take forever to turn. Instead, use single or double stepping. The torque is pretty high, but it's slower than un-geared stepper motors; we topped out at about 50 RPM by overdriving it a bit with 9VDC. At 5V try to keep it below 25 RPM.

Note: This kit includes a ULN2003 stepper motor driver board, it has a ULN2003 DARLINGTON array to control 4-phase - 5-wire stepper motors (5v-12v). It is easy to use with Arduino or another development platform for the stepper motor.