Add Digital inputs and outputs, Analog inputs, PWM outputs, multiple SPI, I2C and 1-Wire master buses to your computer.
http://www.flyfish-tech.com/FF32/index.php#Overview

Flyfish FF32 Gets GUI
http://hackaday.com/2015/07/20/flyfish-ff32-gets-gui/

[CWroos] has written an impressive GUI for the Flyfish FF32. The Flyfish is a port expander of sorts, allowing the user access to a large array of I/O , analog inputs, SPI, I2C and a few other connectivity options over a USB connection. There is no driver as it uses a native HID driver in the operating system of the device it’s attached to. It’s not just tethered to a PC either. It works with Raspberry Pi, Beaglebone and several other SBCs.

[CWroos]’s GUI makes it easier than ever to interact with the FF32. It has a script editor allowing you to run and edit scripts on the fly

This short document illustrates how to connect a passive infrared sensor (PIR sensor) to phatIO.

The PIR device has 3 pins: 5V, GND, and OUT. When connected to phatIO’s 5V and GND pins the OUT pin will be at 0V until movement is detected, it then goes to 3V – this is high enough to be read as a digital 1 by phatIO when connected to one of its IO pins. The PIR modules ‘time’ and ‘sensitivity’ trimpots can be used to alter how long the PIR OUT pin stays high and how soon it will detect movement respectively. I found the default values to be fine.

Turn off Computers Screen Saver

The phatIO config below (copy to run.lio on your phatIO device) will send a shift key to the computer when it detects movement after 60 seconds of no movement.

This is useful used in conjunction with a screen saver to turn off your monitor after a few minutes of inactivity (when you walk away from the computer) but keep it on whist moving around your desk or walk back into range.

Other Ideas
Using techniques from Keyboard Hacks to launch applications on the host computer it would be possible to make the host computer capture an image with a webcam when it detects movement (see CommandCam and imagesnap).

AT90USB82/162 from Atmel as it is quite cheap but also because there are a few libraries available for it: Lufa and the teensy examples

First, Dropbox Integration was succesfully tested on Windows 8 – it should work with all versions of Windows from Vista onwards. This means that a phatIO directory can be exported to dropbox and the files edited remotely – even shared with other users. This is a very cheap way of remoting IO – you can send something to a display or turn a device on, from across the world, by simply plugging in a phatIO and installing Dropbox.

Windows C# code that retrieves the value of the phatIO pin files, bypassing the Windows/Filesystem Cache

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