使用28BYJ-48步進馬達配合ULN2003驅動器同Arduino

// Original source is http://www.geeetech.com/wiki/index.php/Stepper_Motor_5V_4-Phase_5-Wire_%26_ULN2003_Driver_Board_for_Arduino
// Update by Ahmad Shamshiri for RoboJax.com
// Published on March 27, 2017 in Ajax, ON, Canada.
/*
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 *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been downloaded from RoboJax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */


int Pin1 = 10; 
int Pin2 = 11; 
int Pin3 = 12; 
int Pin4 = 13; 
int _step = 0; 
boolean dir = true;// false=clockwise, true=counter clockwise
int count=0;
void setup() 
{ 
 pinMode(Pin1, OUTPUT);  
 pinMode(Pin2, OUTPUT);  
 pinMode(Pin3, OUTPUT);  
 pinMode(Pin4, OUTPUT);  
} 
 void loop() 
{ 
 switch(_step){ 
   case 0: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, HIGH); 
   break;  
   case 1: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, HIGH); 
     digitalWrite(Pin4, HIGH); 
   break;  
   case 2: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, HIGH); 
     digitalWrite(Pin4, LOW); 
   break;  
   case 3: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, HIGH); 
     digitalWrite(Pin3, HIGH); 
     digitalWrite(Pin4, LOW); 
   break;  
   case 4: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, HIGH); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, LOW); 
   break;  
   case 5: 
     digitalWrite(Pin1, HIGH);  
     digitalWrite(Pin2, HIGH); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, LOW); 
   break;  
     case 6: 
     digitalWrite(Pin1, HIGH);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, LOW); 
   break;  
   case 7: 
     digitalWrite(Pin1, HIGH);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, HIGH); 
   break;  
   default: 
     digitalWrite(Pin1, LOW);  
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
     digitalWrite(Pin4, LOW); 
   break;  
 } 
 if(dir){ 
   _step++; 
 }else{ 
   _step--; 
 } 
 if(_step>7){ 
   _step=0; 
 } 
 if(_step<0){ 
   _step=7; 
 } 
 delay(1); 

}