Opencircuit Rotary encoder module (KY-40)

A rotary encoder gives a number of pulses when the knob is turned. The rotary encoder on this module gives 20 pulses when the knob is turned 360 degrees, which means that a pulse is delivered every 18 degrees. The rotary encoder can also be 'pressed', for example to select a menu option. The module is supplied without connection ring and nut.