I wonder if some of you are working with hardware/circuitry via serial or parallel port in ruby, not with arduino or something similar, just sending receiving pulses thru the ports to a breadboard? or if someone knows a well documented library/gem or a good blog post on the subject.
So far I've found these the blog post about 'raw' port manipulation is very cool but short.
http://blog.stevenocchipinti.com/2011/10/ruby-parallel-port-leds.html
these libraries seem nice, but don't have very good docs:
http://rubygems.org/gems/serialport
https://github.com/hparra/ruby-serialport/