Sleep Apnea is a problem for many people. and the ability to track one's movements while sleeping can provide data which is an interesting window in to the larger problem. Although it won't detect actual apnea events, the following project by backyard inventor Eddy provides a neat method of tracking movements.
Based around an accelerometer module, the device can take movement data when detected and store it in the Arduino's internal EEPROM. This can later be interrogated and analysed. It provides the framework for a more complex monitoring device, for example you could add a real-time clock IC and an SD card to make data retrieval simpler.
For more information, example code and progress reports check out Eddy's interesting website. And for more, we're on facebook, twitter and Google+, so follow us for news and product updates as well. If you're looking for an easy to use acceleromter, check out our AM3X accelerometer module:
This tiny 3-axis accelerometer module can operate in either +/-1.5 g or +/-6 g ranges, giving your project the ability to tell which way is up. Ideal for robotics projects, tilt sensors, vehicle data loggers, and whatever else you can dream up. Plus it's compatible with 3.3V and 5V boards. For more information and to order, click here.