Until now, the choice of an absolute encoder meant an expensive, and larger sized product. It differs from the more common incremental rotary encoder which has only two or four values in a rotation and is designed to measure full rotations and direction. The library includes optional automatic saving of logical zero and multiturn offset to EEPROM so that the system will remember these settings after power down or reset. This is an alternative to using a potentiometer and analog pin, allowing full-turn and multi-turn operation, and is not impacted by temperature variations. The module communicates via the I2C bus with 16 addresses available. It is designed as a control panel knob and includes a nut and washer, but can be adopted for other uses. A digital control knob providing 128 unique results evenly spaced around a full circle.
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