Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
The best hack I saw in OSCON yesterday was in Jonathan Oxer’s Hardware / Software Hacking: Joining the Real and the Virtual.
Jonathan brought a table lamp in a whole box of breadboards and other electronic components from Australia. He connected the table lamp to a remote appliance control. Then he opened the remote control and connected a relay across one fof the buttons. The relay hooked up to an Arduino also connected to his laptop.
He then wrote a small program to run on the Arduino. By sending a single command through the USB port, the Arduino flipped the relay and turned off the light.