While there are a couple of open-source brushless drivers already available, [neuromancer2701] created his own brushless motor controller on an Arduino shield.

The build relies on an Arduino Uno as the brains. It’s equipped with an L293D motor driver shield to run two DC gear motors which drive the walking assemblies.

A 12-bit analogue DAC is also provided on the new board. To ensure backwards compatibility with existing code examples and tutorials, significant efforts are being made on the software side of the UNO ...

An Arduino-based cnc controller for separate stepper drivers? grbl is stepper motor controller firmware for three-axis cnc machines, intended to run on Arduinos with a motor driver add-on board.