There are multiple ways to control a Spindle from the breakout board.
Relay driver for on/off control via external relay - 5 and 12V relays are supported.
5V TTL/SSR output on/off control via an external relay board or solid state relay.
Spindle Enable for on/off control via an external spindle controller.
Spindle Speed control via an external spindle controller.
Spindle Speed control via 0-10V control interface.
The 0-10V output is adjustable to fine tune the spindle speed.
VFDs (Variable Frequency Drive) are supported .