by Think3dPrint3d, published
The PaneIolu2 is a new version of the original Panelolu that uses an I2C port expander.
More detail at http://blog.think3dprint3d.com/2013/02/panelolu2.html
available here http://www.think3dprint3d.com/Electronics/Panelolu2
The I2C port expander is used to drive the LCD screen and adds a piezo buzzer, and indication LEDs. This uses less pins making it compatible with the Mezli electronics and even leaves enough spare pins to drive a couple more outputs. Versions available for Printrboard, RAMPS, Melzi and Sanguinololu
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The case comes in two main parts - front and back. The SCAD file has a switch at the beginning to generate either the front or back, I have added the STLs as well
You will also need knob for the rotary encoder. I have modified MiseryBot's design: http://www.thingiverse.com/thing:17404 to be about 1/3 smaller, and cut it a lot thinner. The STL for this is uploaded and I will get the SCAD code up once its integrated into the rest of the Panelolu2 code.
The SCAD file also has the option to generate legs to use as a stand, as shown in the attached photo. I have uploaded the leg and front lug (2 required) for a 60 degree from horizontal option which I like Ã¢â¬â the SCAD code is easy to change to make legs to hold the screen at whatever angle you like (between about 20 and 80 degrees!)
In order to make the Panelolu2 "plug and play" with as many 3d printer control electronics as possible adapter boards are used (see the blog post for details). Currently there are boards for Sanguinololu and Melzi, I will be adding designs for RAMPS, Printrboard and others if there is interest. It is also possible to crimp standard connectors onto the ribbon cable which should allow compatibility with any electronics that have the required pins and memory. The eagle files for these boards are available on github: http://github.com/T3P3/Panelolu2