BDE-Electrical/Electronic

Encoder tracking is a technique that monitors a reference motor with an encoder and controls a secondary motor.

Many displays are difficult to read when viewed in sunlight.

This chapter covers representative general-purpose relays used in the control circuits of most industrial, commercial, and consumer products.

Light sensors often use an infrared LED as a light source.

Full-voltage, single-speed motor starters: Single-speed squirrel-cage motors have starters that fall into two categories: full-voltage or across-the-line starters; and reduced-voltage starters.

Electronic equipment requiring dc power must adjust the ac input to a usable level with transformers or switching transistors and use a rectifier stage to convert the ac to dc.

Despite their superior qualities, brushless motors still run second to brush types in motion-control applications.

Most printed-board connectors are either a one-piece receptacle or a two-piece plug and jack.

Dc motors are energized or started by manually operated switches or magnetically operated contactors.

Many types of transducers are beneficiaries of IC technology.

Motors should have protection for themselves, the branch circuit, and the feeder line.

Rotary and linear optical encoders are common in position and motion sensing.

Planning for packaging and interconnections in the early phases of a design project eliminates the chances of poor design degrading long-term reliability.

Asperities: Mass-produced switch contacts have an rms roughness ranging from 0.

Power operational amplifiers (POPs) are becoming increasingly common in control circuitry.