GRBL or LinuxCNC Components - smartroad/GRBL-LinuxCNC-Controller GitHub Wiki

Depending on which mode you want to use the board in, you can omit certain components.

GRBL Arduino Shield

Omit:

R8-10 - Pullup resistors

X1 - 25 D Socket

IC1 - 5V Regulator

C4 - Regulator output smoothing capacitor

##LinuxCNC Parallel Interface Omit:

S1 - Reset Switch

SV9-12 - Arduino Header Pins