He LED table presented in this project is being powered by tweets in order to be much more exciting by making the light show, as shown in the image below. A previous project is used to build this Twitter-enabled device wherein on top of an IKEA coffee table is a 9×9 grid arrangement that uses 81 RGB LED modules on the next image.

By adding a Bluetooth Arduino Shield, the multi-colored LED display is extended by the Live Twitter table. The shield will connect to a nearby MacBok Pro through wireless. The tweets broadcast with the #led table hash tag controls the table and formatted with pixel coordinates for the LED matrix. The incoming Twitter posts is parsed by a Twitter interface code and is transmitted to the Arduino microcontroller through Bluetooth. The changing display on the LED table is set up by a continuous stream of Tweets, as seen in the image below.

The coffee table is made up of steel and glass where a wooden tray was planned to be placed under the table’s angle iron frame in order to provide LED spacing. Without modifying the actual table frame, the tray can be easily installed and removed using a neat trick. A symmetric arrangement can only be achieved using a 9×9 grid instead of 8×8 since it is possible at the center of the grid to put a pixel.

A long chain that zigzags across the table is used to wire the ShiftBrites. Since the full power of the array should not go through the cables and traces of the first ShiftBrites, power is wired into various points as shown in the image below. A simple wooden box with 7.5VDC 8A power supply is used to house the controller from the next image.

A ShiftBrite Shield is the first on the stack as it provides an easy way to wire up power and data to a ShiftBrite chain. A Prototype Bluetooth Shield is the second on the stack which provides a serial connection to a computer over Bluetooth and can be wired to any of the pins on the Arduino. Since the Bluetooth module runs on 3.3V, a couple of transistor-based level converters are available along with 3.3V regulator.

It is possible to have multiple wireless devices connected to one computer, scattered around an area, and monitoring different things since it uses Bluetooth. The remote device could also be capturing data because Bluetooth is a 2-way medium.