Datasheet

This hardware/software platform, designed for use with iPhone

and Android

smartphones, is the simplest way to design compact sensor peripherals that use the

phone’s audio jack for data and power.

NXP Smartphone

Quick-Jack solution

Turn the audio jack into a multi-purpose,

self-powered data port

KEY FEATURES

` Complete hardware and software design, ready to customize

- 32-bit NXP LPC812 microcontroller

- Battery-free operation

- Expansion connector for attaching external sensor, switch,

or input device

- Male/audio jack

- Temperature sensor

- LEDs

- Joystick

` Free, downloadable iPhone and Android apps,

with source code

APPLICATIONS

` Cloud-based tracking of sensor data

` External input devices to smartphone

` Wearable health monitors

` Personal exercise trackers

` Handheld weather stations

` Handheld inventory monitors

` Handheld/portable POS devices

` Universal remote controls

The NXP Smartphone Quick-Jack solution enables a new

generation of peripherals that support data collection and

control. Compatible with iPhone and Android platforms, the

Quick-Jack solution uses the smartphone’s audio jack as the

data channel and to provide power to the board. It supports

simple, plug-and-play operation, yields a small design, and

requires no licensing for development.

Peripherals based on the Quick-Jack solution make it possible

for the phone to read sensor data which can then be stored,

displayed, and quickly transmitted to the cloud. In a wearable

health monitor, for example, the Quick-Jack solution can be

used to track a patient’s heart rate, blood pressure, and body

temperature. Sensor data can be displayed on the phone, for

use by the patient, and can also be transmitted to the cloud for

use by caregivers.

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NXP Smartphone Quick-Jack solution Turn the audio jack into a multi-purpose, self-powered data port This hardware/software platform, designed for use with iPhone® and Android® smartphones, is the simplest way to design compact sensor peripherals that use the phone’s audio jack for data and power.
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HOW IT WORKS A power-efficient LPC812 microcontroller is programmed to transmit and receive data to/from the phone using the audio jack. Transmission uses the familiar Manchester Coding format to ensure convenient, reliable operation. The microcontroller automatically identifies microphone (MIC) and ground (GND), for quick and easy operation. The energy-harvesting block uses the right channel of the audio jack to output a 21.3 kHz sine waveform. The block rectifies the signal and generates a DC output.