Actually there is no need to explain more about stepper motors than that video does:
Currently I am using this python code to get the motors running:
#!/usr/bin/env python # import required libs import time import RPi.GPIO as GPIO GPIO.cleanup() #cleaning up in case GPIOS have been preactivated # Use BCM GPIO references # instead of physical pin numbers GPIO.setmode(GPIO.BCM) # be sure you are setting pins accordingly # GPIO10,GPIO9,GPIO11,GPI25 StepPins = [10,9,11,25] # Set all pins as output for pin in StepPins: GPIO.setup(pin,GPIO.OUT) GPIO.output(pin, False) #wait some time to start time.sleep(0.5) # Define some settings StepCounter = 0 WaitTime = 0.0015 # Define simple sequence StepCount1 = 4 Seq1 =  Seq1 = range(0, StepCount1) Seq1 = [1,0,0,0] Seq1 = [0,1,0,0] Seq1 = [0,0,1,0] Seq1 = [0,0,0,1] # Define advanced sequence # as shown in manufacturers datasheet StepCount2 = 8 Seq2 =  Seq2 = range(0, StepCount2) Seq2 = [1,0,0,0] Seq2 = [1,1,0,0] Seq2 = [0,1,0,0] Seq2 = [0,1,1,0] Seq2 = [0,0,1,0] Seq2 = [0,0,1,1] Seq2 = [0,0,0,1] Seq2 = [1,0,0,1] #Full torque StepCount3 = 4 Seq3 =  Seq3 = [3,2,1,0] Seq3 = [0,0,1,1] Seq3 = [1,0,0,1] Seq3 = [1,1,0,0] Seq3 = [0,1,1,0] # set Seq = Seq2 StepCount = StepCount2 # Start main loop try: while 1==1: for pin in range(0, 4): xpin = StepPins[pin] if Seq[StepCounter][pin]!=0: #print " Step %i Enable %i" %(StepCounter,xpin) GPIO.output(xpin, True) else: GPIO.output(xpin, False) StepCounter += 1 # If we reach the end of the sequence # start again if (StepCounter==StepCount): StepCounter = 0 if (StepCounter<0): StepCounter = StepCount # Wait before moving on time.sleep(WaitTime) except: GPIO.cleanup(); finally: #cleaning up and setting pins to low again (motors can get hot if you wont) GPIO.cleanup(); for pin in StepPins: GPIO.setup(pin,GPIO.OUT) GPIO.output(pin, False)
it is based on code by matt.hawkins but with some improvements I did.
Please be sure you set your GPIOs accordingly to your [amazon &title=Raspberry Pi&text=Raspberry Pi] Revision. So mine was REV 2.0.
Run the code with
sudo python nameOfTheFile.py
and hit [Ctrl]+[C] to stop it. All pins will be set to low afterwards.
In case you want control two motors of this type see another post I made here.
For a different version see: