That’s the idea behind this Arduino-based measuring jig for fabricating parts for a CNC build. When it comes to building on the cheap, nobody holds a candle to [HomoFaciens].

Relative rotary encoder The relative rotary encoder, also known as incremental encoder, is an applied optical encoding methodology. Generally, the rotary encoder utilizes a patterned spinning disc ...

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

The encoder delivers data for display or data that may serve as feedback in a motor-control system. Such information is supplied to a host microcontroller for processing according to the application.

By Glen Young, Actel September 11, 2007 -- pldesignline.com Precisely tracking speed, acceleration, and position of a motor's rotor is an essential requirement for many motor control applications ...