Editing Rotary encoder

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In computer input terms, a '''rotary encoder''' is a device which measures the rotation of a roller or wheel so that the host device may relay this back to the computer.

The best-known implementation is that of a finely-spoked wheel flanked by a pair of LEDs and photo-diodes. Through this arrangement, the electronics detect the rotation of the wheel as the flanges alternatively cut the light beams. This is the standard implementation of the axis rollers in [[opto-mechanical sensor|opto-mechanical pointing devices]].

==Gallery==
<gallery widths=250 heights=187>
File:Logitech Y-RJ20 -- rotary encoder, side view.jpg   | Side view of volume control encoder
File:Opto-mechanical sensor.jpg                         | Opto-mechanical rotary encoder in a computer mouse
File:Key Tronic pro mouse -- rotary encoder, opened.jpg | Alps electromechanical [[rotary encoder]] in a [[Key Tronic Professional Series Mouse]]
</gallery>

[[Category:Keyboard terms]]
[[Category:Pointing device terms]]