App note: NXP Smartphone Quick-Jack Solution

An interesting app note (PDF) from NXP where you can interface your mobile phone with a microcontroller via the audio 3.5mm jack. Inspired by the University of Michigan’s Project HiJack, the NXP Smartphone Quick-Jack Solution repurposes the standard 3.5mm stereo audio jack found on most smartphones into a self-powered data channel that makes communication with […]