Public Class Form1
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load




        With SerialPort1
            .PortName = "COM3"
            .BaudRate = 9600
            .DataBits = 8
            .Parity = IO.Ports.Parity.None
            .StopBits = IO.Ports.StopBits.One
            .Handshake = IO.Ports.Handshake.None

        End With

        Try
            SerialPort1.Open()
        Catch ex As Exception
            MessageBox.Show(ex.ToString)


        End Try

    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        SerialPort1.Write("1")

    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        SerialPort1.Write("0")
    End Sub

    Private Sub TrackBar1_Scroll(sender As Object, e As EventArgs) Handles TrackBar1.Scroll
        Label2.Text = TrackBar1.Value
        Dim xxx As Integer


        xxx = TrackBar1.Value
        SerialPort1.Write(xxx)    'Estas xxx van de 1 a 255 y las tiene que leer arduino



   

    End Sub
End Class

int LedPin = 3;
int xxx;

void setup() {

 pinMode(7,OUTPUT);
 pinMode(3,OUTPUT);
 Serial.begin(9600);

}

void loop() {

  if (Serial.available()){

    int led =(int)Serial.read() -48;
   

       analogWrite(LedPin,xxx); / Aca tendria que recibir los valores de 1 a 255 y mover o prender de apoco un led... 
    
    
    switch (led){
     case 1:
     digitalWrite(7,HIGH);  
   
      break;
      case 0:
      digitalWrite(7,LOW);
      break;
     // case 2:
      //digitalWrite(6,OUTPUT);
     // break; 
    }



}

}

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	<nav id="navigation">
		<ul>
			<li><a href="index.php">Inicio</a></li>
			<li><a href="#">Services</a></li>
			<li><a href="#">Portfolio</a></li>
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			<li><a href="index.php?page=1B">Iniciar sesion</a></li>
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<?php
if (empty($_GET)) { 

include_once('../index/galeria.php');


//	header("Location:../index.php?page=1&dsdsd=3000");
}else{

switch($_GET['page']){

case "1A":
include_once('../we_reg_usuario/form_inicio_usuario.php');
break;


case "1B":

echo "<div class='formusuario'>";

include_once('../regusuraios/formusuarioA.php');

echo "</div>";
break;


case "1C":
echo "<div class='contacto'>";
include_once("../contacto/formContacto.php");
echo "</div>";
break;
}
}