For colour hackers

[Christopher Browne]

The ColorHug is a small accessory that measures displayed colors very
accurately. It is held on your display and plugged into a spare USB
port on the computer for the duration of the calibration.
  http://www.hughski.com/

All the code, including firmware and schematics, is available as free software:
  https://gitorious.org/colorhug
-- 
When confronted by a difficult problem, solve it by reducing it to the
question, "How would the Lone Ranger handle this?"
--
The Toronto Linux Users Group.      Meetings: http://gtalug.org/
TLUG requests: Linux topics, No HTML, wrap text below 80 columns
How to UNSUBSCRIBE: http://gtalug.org/wiki/Mailing_lists