The Grbler is a 3-axis CNC controller. It uses an ATmega328p, FT232RL for USB-to-serial, and 3
Pololu A9488 stepper driver boards. I designed it specifically for use with the
Grbl CNC firmware, and it matches the default Grbl configuration, including buttons for the feed hold, cycle start and abort controls added in Grbl 0.8. It is designed to be compatible with the Arduino Uno bootloader for easy prototyping with alternative firmware.
Grbler rev. 1: