Arduino StoneSpray – 3D printing with Sand

StoneSpray: Arduino 3D printer with Sand Project

Awesome project, which uses sand and a liquid to create a robot capable of printing in 3D.

 The device uses an Arduino UNO, Processing application and a custom built jet spray system to deposit the mix of soil and binder, for constructing architectural shapes.

Link [Creative Applications]

Arduino stepper motor control tutorial

Simple tutorial of how to control a Stepper Motor with Arduino

In this project (BumbaBot), the author show how to  reuse a stepper motor from an old broken printer.

Only need a ULN2003 chip and a Arduino for controlling de stepper motor.

Link [Silveira Neto]

Arduino control over internet via Android

Control Anything With Your Android Phone and Arduino Via The Internet. No Ethernet Shield Required

This project shows how to control anything from internet, using an Android phone via an Arduino without an ethernet shield. The connection is made through a PC's USB port and the Arduino.

Link [Allaboutee]

Arduino leds control over serial

How to control leds with Arduino over a serial

A simple way to communicate with Arduino via serial without complicated programming and waste space.
Sending simple character commands over serial port , you can control a variety of elements with an Arduino. In this simple project, 10 leds are controlled by a simple program.

Link  [Bildr]