The Raspberry Pi is a wonderful little computer, but one thing it isn't very good at is controlling DC Servo Motors - these motors need very specific and repetitive timing pulses to set the position. Instead of asking the Pi Linux kernel to send these signals, pop on this handy HAT! It adds the capability to control 16 Servos with perfect timing. It can also do PWM up to 1.6 KHz with 12 bit precision, all completely free-running.
The cute PiTFT got even more adorable with this little primary display for Raspberry Pi in HAT form! It features a 2.2" display with 320x240 16-bit color pixels. The HAT uses the high speed SPI interface on the Pi and can use the mini display as a console, X window port, displaying images or video etc. Best of all it plugs right in on top of your Model A+ or B+ and fits into our case quite nicely.
You can install open source OctoPrint software on your desktop or laptop computer as a general purpose tool to manage and print to a broad selection of 3D printers. The real strength of the OctoPrint project comes into play when you explore embedded solutions on affordable SBCs such as Raspberry Pi and BeagleBone Black computers for wireless printing, custom gcode or shell driven event hooks, automatic timelapse production and uploading and more. Here are some resources to help you setup your OctoPrint software for use with the desktop 3D printers currently offered at Adafruit.