интересует возможность управления 8-ми двигателями в одном напралении и с одной скоростью с помощью Motor shield L293D.код взят от сюда...http://playground.arduino.cc/Main/AdafruitMotorShield перепахан и все равно не работает.Пхните ногой куда копать з сдвиговіми регистрами пока играюсь.спасибо!!

#include <AFMotor.h>

// Arduino pins for the shift register
#define MOTORLATCH 12
#define MOTORCLK 4
#define MOTORENABLE 7
#define MOTORDATA 8

// 8-bit bus after the 74HC595 shift register 
// (not Arduino pins)
// These are used to set the direction of the bridge driver.
#define MOTOR1_A 2
#define MOTOR1_B 3
#define MOTOR2_A 1
#define MOTOR2_B 4
#define MOTOR3_A 5
#define MOTOR3_B 7
#define MOTOR4_A 0
#define MOTOR4_B 6

// Arduino pins for the PWM signals.
#define MOTOR1_PWM 11
#define MOTOR2_PWM 3
#define MOTOR3_PWM 6
#define MOTOR4_PWM 5


// Codes for the motor function.
#define FORWARD 1
#define RELEASE 2


void setup()
{
  Serial.begin(9600);
  Serial.println(" Motor Shield Go!!");
}

void motor(int nMotor, int command, int speed)
{
  int motorA, motorB;

  if (nMotor >= 1 && nMotor <= 4)
  {  
    switch (nMotor)
    {
    case 1:
      motorA   = MOTOR1_A;
      motorB   = MOTOR1_B;
      break;
    case 2:
      motorA   = MOTOR2_A;
      motorB   = MOTOR2_B;
      break;
    case 3:
      motorA   = MOTOR3_A;
      motorB   = MOTOR3_B;
      break;
    case 4:
      motorA   = MOTOR4_A;
      motorB   = MOTOR4_B;
      break;
    default:
      break;
    }

    switch (command)
    {
    case FORWARD:
      motor_output (motorA, HIGH, speed);
      motor_output (motorB, LOW, -1);     // -1: no PWM set
      break;
    case RELEASE:
      motor_output (motorA, LOW, 0);  // 0: output floating.
      motor_output (motorB, LOW, -1); // -1: no PWM set
      break;
    default:
      break;
    }
  }
}

void motor_output (int output, int high_low, int speed)
{
  int motorPWM;

  switch (output)
  {
  case MOTOR1_A:
  case MOTOR1_B:
    motorPWM = MOTOR1_PWM;
    break;
  case MOTOR2_A:
  case MOTOR2_B:
    motorPWM = MOTOR2_PWM;
    break;
  case MOTOR3_A:
  case MOTOR3_B:
    motorPWM = MOTOR3_PWM;
    break;
  case MOTOR4_A:
  case MOTOR4_B:
    motorPWM = MOTOR4_PWM;
    break;
  default:
    // Use speed as error flag, -3333 = invalid output.
    speed = -3333;
    break;
  }

  if (speed != -3333)
  {
    // Set the direction with the shift register 
    // on the MotorShield, even if the speed = -1.
    // In that case the direction will be set, but
    // not the PWM.
    shiftWrite(output, high_low);

    // set PWM only if it is valid
    if (speed >= 0 && speed <= 255)    
    {
      analogWrite(motorPWM, speed);
    }
  }
}


// ---------------------------------
// shiftWrite
//
// The parameters are just like digitalWrite().
//
// The output is the pin 0...7 (the pin behind 
// the shift register).
// The second parameter is HIGH or LOW.

void shiftWrite(int output, int high_low)
{
  static int latch_copy;
  static int shift_register_initialized = false;

  if (!shift_register_initialized)
  {
    // Set pins for shift register to output
    pinMode(MOTORLATCH, OUTPUT);
    pinMode(MOTORENABLE, OUTPUT);
    pinMode(MOTORDATA, OUTPUT);
    pinMode(MOTORCLK, OUTPUT);

    // Set pins for shift register to default value (low);
    digitalWrite(MOTORDATA, LOW);
    digitalWrite(MOTORLATCH, LOW);
    digitalWrite(MOTORCLK, LOW);
    // Enable the shift register, set Enable pin Low.
    digitalWrite(MOTORENABLE, LOW);

    // start with all outputs (of the shift register) low
    latch_copy = 0;

    shift_register_initialized = true;
  }

  // The defines HIGH and LOW are 1 and 0.
  // So this is valid.
  bitWrite(latch_copy, output, high_low);
 
  digitalWrite(MOTORLATCH, LOW);
  shiftOut(MOTORDATA, MOTORCLK, MSBFIRST, latch_copy);
  digitalWrite(MOTORLATCH, HIGH);
}
void loop(){





}