Topic: Panelolu 1 Upgrade Possibility for i2c
I just built a i2c panel for my CNC converted to a 3d Printer. It could also provide an upgrade path for owners of the Panelolu so that you can finally run a fan via gcode and use the panel. It works off the Adafruit i2c backpack which plugs right into the Panelolu LCD. The mod will require a new connector for the sanguinololu so you can get at the newly freed pins. Also requires a few mods to the Think3dPrint3d firmware for Marlin. The Adafruit i2c uses the MCP23008 chip and T3P3 uses the MCP23017 so they have buzzers and lights where my mod does not.
If you are interested in my mod, check it out at http://hobbies.boguerat.com/?page_id=33.
If you'd like me to post a Panelolu specific conversion with the Adafruit i2c, just let me know. I'd have to create a new case specific to that design.