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Tag Archives: Android

Portable Bluetooth-enabled scrolling LED matrix display- Part 2

Posted on October 29, 2014 by R-B 31 comments

In Part 1 of this project, we described the construction of Easy Matrix, which is a cascadable 8×8 LED matrix display with MAX7219 chip on board. We developed an Arduino sketch for scrolling text display, whereby the Arduino receives text messages from its serial port and displays the message on a 8×40 LED matrix constructed by daisy-chaining five Easy Matrix modules. The Arduino firmware is also capable of receiving user commands for controlling the scrolling speed and brightness level of the display. In this part, we will discuss about extending the project to cascade 8 Easy Matrix modules and control the display over a Bluetooth connection.

My 3 year old son uses this often to learn alphabets and numbers

My 3 year old son loves to watch scrolling alphabets and numbers on the display

RetroWatch: A DIY Smartwatch using Arduino

Posted on February 16, 2014 by R-B Leave a comment

RetroWatch is an open source project to let you make a smart watch using the Arduino platform. This instructable describes the details of this project in step by step. The hadware design is based on the Arduino Pro mini and the HC-06 Bluetooth module.

RetroWatch: An Arduino smartwatch

Watch the RetroWatch in action in this video.

Two way Bluetooth between Arduino and Android

Posted on July 7, 2013 by R-B Leave a comment

This instructable describes an Android application named Andruino that can be used to control an Arduino board from an Android phone. It’s both an Android app and an Arduino program, and provides a simple user interface to control Arduino’s digital and PWM, send text commands to Arduino, and receive data from Arduino over Bluetooth serial using the popular and inexpensive HC-05 Bluetooth serial module.

Two way communication between Android and Arduino