The Uncia's electronics are (like the rest of the machine) and clone of Sedgewick's electronics. They comprise of a Teensy 2.0 and a single Pololu A4988 stepper driver. Also included is the smallest, most adorable 12V 1A power supply.
The two boards are mounted on a very simple circuit board.
Yes, that's all there is to it. Click the images to see a close up
|This is a simple version -- It just shows what Teensy pins go where. Note that the LED shown is the signal LED that is on the Teensy itself.|
Now for the real deal:
|This is (I believe, unless I screwed up) the full breadboard for the Uncia.|
Anyways, it's clear that the Teensy isn't being used to its full potential. This is actually pretty nice, as it allows for upgrades to the printer without having to swap the electronics!
With these upgrades in mind, I scribbled out the layout of the breakout pads that litter the board.
|The layout of the three pads that line the board.|
When programming new firmware in the Arduino IDE for Teensy (Teensyduino), just keep the following image in mind:
|The numbers closer to the board are the pins called by Arduino code.|
All of this information will be used in the improvement of the Uncia firmware (Or should I say the Sedgewick firmware...). Check it out!