Absolute encoders contain multiple detectors and up to 20 tracks of segment patterns. For each encoder position, there is a different binary output -- shaft position is absolutely determined.

Commercial shaft encoders use magnets and Hall-effect sensors, or optical sensors and encoder discs. But these can be quite expensive, so [Hello1024] hacked together an alternative in an afternoon.

By simply rotating the encoder on the locked motor shaft you can fine tune the commutation alignment with the easy-to-read digital indicator.

Computer Conversions' Shaft-Tracker resolver-based encoder provides both incremental and true absolute position outputs with a resolution of 4096 counts/turn.

Quadrature-output incremental optical shaft encoders are popular in high-performance, bidirectional rotation-sensing applications. Available with resolution options extending beyond 2000 ...

CUI Inc announces the release of the MES3 series, the latest in their line of high performance micro optical encoders. Claimed to be the world’s smallest shaft-type optical encoder, the MES3 has a 5 ...