Smartphones Become Tricorders

“Run tracking and calorie counting apps can certainly be regarded among the successes of the smartphone, but without dedicated sensor hardware, the philosophy of “there’s an app for that” only goes so far. A host of products now available for Android let users with a little bit of technical know-how create powerful devices previously found only in the domain of hospitals and law enforcement. One of the most successful expansion boards that allows Android devices to control external instruments and to orchestrate the collection of a variety of sensor data is the IOIO board. The system works well in wireless mode with most Bluetooth dongles, and its on-board FPGA gives 25 I/O channels, including plenty for analog input. It also handles analog output via pulse width modulation (PWM).” More at ExtremeTech