Using Eloquent outside of Laravel 4 this extends gist https://gist.github.com/4107178

eloquent.php

<?php

require 'vendor/autoload.php';

$resolver = new Illuminate\Database\ConnectionResolver;
$resolver->setDefaultConnection('default');
$factory = new Illuminate\Database\Connectors\ConnectionFactory;
$connection = $factory->make(array(
	'host'     => 'localhost',
	'database' => 'database',
	'username' => 'root',
	'password' => 'password',
	'collation' => 'utf8_general_ci',
	'driver'   => 'mysql',
	'prefix'   => '',
));

$resolver->addConnection('default', $connection);

Illuminate\Database\Eloquent\Model::setConnectionResolver($resolver);


/** use Eloquent **/

use Illuminate\Database\Eloquent\Model as Model;

class Admin extends Model {
	/** This property is required at the momment **/
	/** I hope this to be fixed soon **/
	public $table = "admin"; 
	public $timestamps = false;
}

var_dump( Admin::all() );

As an alternative use https://packagist.org/packages/laravel/database which provides eloquent with migration and more to non laravel projects