Whether you’d like to do some real-time logging of data, or just want to control a project with your Android phone, [Thomas]’s Arduino-Android Bluetooth connection instructable is sure … ...

To control the Arduino he’s using ArduDroid with a Bluetooth module. The app lets you trigger the various digital and analog outputs, and send and receive data.

The hack allows for a one-direction, low-bandwidth connection between an Arduino board and Android phone (you’ll need one that has an electronic compass). Using a one-meter-by-one-centimeter copper ...

Well tech tinkerer Joe Desbonnet has whipped up what he dubs "poor man's NFC" using an Arduino, some magnet wire, and any compass-equipped Android smartphone (which is almost all of them).

Hippo-ADK connects with your Android devices in real time through USB and Bluetooth.This allows you instant access to sensors,switches, accelerometers, gyroscopes, magnetometers, communication ...