ARM-based electronics for the RepRap
This is a set of RepRap electronics build around the LPCXpresso development board. Many parts of the design were borrowed from the excellent Gen7 electronics by Traumflaug.
Like Gen7, the design is meant to be fairly easy to manufacture on a RepRap. The author will be using a UV laser mounted on the RepRap to expose photoresist for etching.
While the design is mostly through-hole, there are a few large (1206) surface mount components. Not to worry, however, in the opinion of the author, 1206 parts are even easier to solder than axial through-hole parts.
A hopefully up-to-date rendition of the board and its schematics can be found in the export branch.
- Four Pololu stepper motor drivers
- Four PWM outputs (for, e.g., heaters)
- Three endstops (5V)
- Four ADC inputs (for, e.g., temperature sensors)
- A few unused pins are brought out to an expansion header
While there may be other options I am unaware of, the author suggests the Smoothie firmware, by Arthur Wolf.