BDE-Electrical/Electronic

Several chip makers can now produce integrated circuits that operate directly from ac lines.

Step motors have several qualities that make them particularly suited for control systems.

Magnetic sensors detect moving ferrous metal.

Mechanical switches can be divided into two basic types.

Liquid-crystal displays are helping manufacturers meet consumer demand for smaller, more portable products.

Solid-state relays (SSRs) control load currents through solid-state switches such as triacs, SCRs, or power transistors.

A gate turn-off switch, also known as a gate-controlled switch (GCS) or gate turn-off thyristor (GTO), is similar to an SCR but can be turned off by a negative signal on the gate terminal.

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

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.