All rotary encoders consist of a light source, light detector, code wheel, and signal processor. There are two basic encoder styles: absolute and incremental.

The video is a primer on encoder design, walking you through the basics of sensing rotation with phototransistors, and how a pair of detectors is needed to determine the direction of rotation.

(See Figure 1.) Figure 1 Encoder Basics The old analog modulator takes in one source, typically baseband audio and video, and creates an analog carrier for those signals to ride on. Composite Video, ...

In linear encoders for NC applications, external electronics interpolate sinusoidal signals from the encoder head. The effect is to subdivide the basic line spacing on the scale to gauge smaller ...

Do your users like to tinker with scripts? Keep yours out of harm's way by using Microsoft's Script Encoder. Greg Shultz shows you how to use the Encoder for basic script protection.