The PiGlow is a small add on board for the Raspberry Pi that provides 18 individually controllable LEDs. You can use it for all sorts of things! And of course, it fits inside a Pibow!
There are tons of things you can do with it:
- Mood lighting / ambience
- Showing current system load
- Notify you of events like mentions in tweets or incoming e-mail
- Feedback the status of scripts/daemons running on your Pi
- Works great when VESA mounted to provide a cast against a wall
- ...and pretty much anything else you can think of!
PiGlow sample code and other instructions
If you just want some Python code to start tinkering with please check out the GitHub repository which also includes the full datasheet for the IC used on PiGlow.
Gordon Henderson has added a PiGlow driver for wiringPi which you can find here: http://wiringpi.com/dev-lib/piglow/
Simon Walters has added PiGlow support for Scratch which is here: http://cymplecy.wordpress.com/
Jason Barnett has put together a great Python class and a load of samples: https://github.com/Boeeerb/PiGlow
Ben Lebherz has forked Jasons project and tidied up the code a bit while adding gamma correction: https://github.com/benleb/PyGlow
Manuel Ernst has created a Node.js library: https://github.com/zaphod1984/node-piglow