GRBL is CNC Motion Control firmware that runs on the popular Arduino Uno board.

Connecting up wires can be a little fiddly when trying to connect up Stepper motors, limit switches etc.
So we decided to design a Breakout Board for it and make it available as a DIY solder up kit.

We have brought out the all the pins through buffer chips which are open collector outputs and also we have added a optocoupler IC for each limit switch. This allows higher voltage inductive sensors to be used, as well as micro switches.

Full information can be found on our website.

http://www.ukcnc.net/index.php/products/motion-controllers/

Here is a video showing the GRBL Breakout Board connecting to existing CNC Machine Controller.