Control de motores con el módulo L9110s dual y Arduino

Controlador de motores DC y stepper motors.
HG7881

Conexiones con arduino:
L9110s               arduino
  B-IA     ----------    D5
  B-IB      ----------   D6
  VCC     ----------   +5v
  GND    ----------    gnd
  A-IA    ----------    D3
  A-IB    ----------    D4

  MOTOR A  === Motor A

  MOTOR B  === Motor B

Code arduino:
//----------------------------------------------------------------------
const int AIA = 3;
const int AIB = 4;
const int BIA = 5;
const int BIB = 6;
byte speed = 255;

void setup() {
   pinMode(AIA, OUTPUT);
   pinMode(AIB, OUTPUT);
   pinMode(BIA, OUTPUT);
   pinMode(BIB, OUTPUT);
 }

void loop() {
  forward();
  delay(2000);
  backward();
  delay(2000);
}

void backward() {
  analogWrite(AIA, 0);
  analogWrite(AIB, speed);
  analogWrite(BIA, 0);
  analogWrite(BIB, speed);
}

void forward() {
  analogWrite(AIA, speed);
  analogWrite(AIB, 0);
  analogWrite(BIA, speed);
  analogWrite(BIB, 0);
}

//----------------------------------------------------------------------


Ref.:
http://me.web2.ncut.edu.tw/ezfiles/39/1039/img/617/L9110_2_CHANNEL_MOTOR_DRIVER.pdf
http://www.dx.com/es/p/hg7881-two-channel-motor-driver-board-blue-green-black-2-5-12v-2157

Giroscopio/acelerómetro MPU-6050 GY-521 con Arduino

Conexiones GY-521 - Arduino

GY-521               arduino
VCC  ----------    +5V
GND  ----------    gnd
SCL   ----------    A5
SDA  ----------    A4


Código arduino:

//-------------------------------------------------------------------------------
#include
#include
#include

MPU6050 mpu;

int16_t ax, ay, az;
int16_t gx, gy, gz;

int valY;
int valX;

void setup()
{
  Wire.begin();
  Serial.begin(9600);
  Serial.println("Initialize MPU");
  mpu.initialize();
  Serial.println(mpu.testConnection() ? "Connected" : "Connection failed");
}

void loop()
{
  mpu.getMotion6(&ax, &ay, &az, &gx, &gy, &gz);
  valY = map(ax, -17000, 17000, 0, 179); //funciona bien asi cambiando x/y
  valX = map(ay, -17000, 17000, 0, 179);

  Serial.print("X:");
  Serial.print(valX);
  Serial.print("  Y:");
  Serial.println(valY);

  delay(10);
}
//-----------------------------------------------------------------------------------

Ref.: 
http://www.dx.com/es/p/gy-521-mpu6050-3-axis-acceleration-gyroscope-6dof-module-blue-154602