Brainwave is a low cost controller for Reprap 3D printers derived from the well known Sanguinololu. The primary design goal was lower cost, achieved by providing only the minimum required components for a single extruder printer. It can be used to drive a cartesian or delta style printer.FeaturesHardware configurationSet micro-stepping selector jumpers (D1, D2) per channel. Short both for 32x microstepping. See table on back of board for other configurations. Default: single-step. Set stepper current reference voltages. I = V / 2.55. Default: 1V == 400mA.Software configurationOpen Arduino, find the Marlin directory and open Marlin.ino. Select 'Brainwave' from the Board menu. Find the Configuration.h file and change DEFAULT_AXIS_STEPS_PER_UNIT to suit your printer (remember, 32x microsteps!) Power on the Brainwave and connect the USB cable (note: the brainwave will not power up off USB, you need the 12V supply.) Hold down the PROGRAM button and press RESET, the STATUS led should pulse. Press the Upload button in Arduino. After a reset the brainwave will show up as a CDC ACM serial device (/dev/ttyACM[0..9] on Linux) and be ready to accept commands.Brandon Bowman wrote up an excellent guide for getting the board working under Windows and MacOS: http://fabbersuw.blogspot.com/2012/12/if-your-brainwaves-got-no-brains-or.htmlBrainwave wiring diagram provided by Brandon Bowman.Known issuesPrimary development of Brainwave will continue at http://github.com/unrepentantgeek/BrainwaveSpecial thanksJulie Atwood Matt Westervelt Frederik Hubinette Silas Snider Johann Rocholl JP Sugarbroad Austin Appleby Richard DeLeon Plamena Milusheva Mark Ganter Brandon Bowman