Octopus Analog Rotation Brick is arduino compatible and can be rotated up to 300-degree. It is based on the potentiometer. With the Arduino IO expansion board, in combination, it can be very easy to achieve position-dependent interaction with the rotating effect or produce MIDI instrument.
News: All of Octopus bricks has supported Scratch programming. ElecFreaks builded EFBlock support drag and drop programming . Guide please check here