NXP Semiconductors N.V. (Eindhoven, Netherlands) announced a new Smartphone Quick-Jack Solution that is said to simplify connecting a variety of external devices to smartphones for self-powered data communications. Adapting the standard 3.5-mm audio jack found on smartphones, the Solution creates a universal interface for external sensors, switches, peripherals and other devices. Inspired by the University of Michigan’s Project HiJack, it gives mobile, consumer and industrial product designers simple, plug-and-go connectivity for adding features to a variety of applications, from wearable medical and fitness devices, gaming controllers, and toys, to diagnostics and maintenance tools. The Smartphone Quick-Jack Solution comprises a small board, a free example app for popular smartphone OSs, and design documentation. The board houses:
- The LPC812 microcontroller to handle decoding/encoding of the Manchester algorithm (enabling use of the left audio channel for data transport) and communication with external peripherals.
- Source code for the LPC812 is available free and is ready to use with NXP LPCXpresso tools.
- A standard extension header for easy connection of sensors, switches, HMI peripherals, or data- collection devices.
- An energy harvesting circuit that draws power from the smartphone over the right audio channel to power the board and attached components.
- An onboard miniature joystick to visualize data/signals and control the smartphone UI in the example application.
For more information, visit
