The difference between a drought and a famine is down to man. Texas is in the middle of its worst drought on record right now but cowboys arenât starving â because Texas, and the US, have government and economy enough to ensure they donât.
Incremental Encoders. An encoder is an electrical mechanical device that converts linear or rotary displacement into digital or pulse signals. The most popular type of encoder is the optical encoder, which consists of a rotating disk, a light source, and a photo detector (light sensor).The disk, which is mounted on the rotating shaft, has patterns of opaque and transparent sectors coded into the disk (see Figure 1).he most popular type of encoder is the optical encoder, which consists of a rotating disk, a light source, and a photo detector (light sensor). The disk, which is mounted on the rotating shaft, has patterns of opaque and transparent sectors coded into the disk (see Figure 1).
Encoder and decoder function. There are lots of encoders/decoders. A typical encoder takes a signal that is 1 out of N, encodes and it into a smaller number of lines. A corresponding decoder takes those encoded value, and restores the 1 of N value. For example, here is a 1 of 9 decoder, which encodes the input into a 4-bit BCD value.