Proximity Switch

A practical guide to state-of-the-art power supply design Nowhere else can you find, in one book, all the information you need to design a switching power supply. And no other book on the subject is as practical, yet mathematically sufficient, without being unnecessarily academic. Using a tutorial, how-to-do-it approach, Pressman first explains basic principles and why thigs are done as they are. With a knowledge of basic principles, the engineer can easily cope with new design requirements and evaluate alternative design decisions. The topics covered represent all those areas where a design decision has to be made in commencing a new design. These include: Topology Descriptions -- A quantitative description of the roughly 15 commonly used topologies. Maximum current and voltage stress on power transistors for specified input voltage-output powers are described. The discussion permits selection of an optimum topology for the specified input-output voltages, output powers, and the selection of the power transistors; High-Frequency Magnetics Fundamentals--Ferrite core hysteresis, coil skin effect, and proximity effect losses; Transformer Design--Derivation of equation for transformer core selection for available output power as a function of frequency, flux density, iron and bobbin area, and topology; novel charts derived from the equations, permitting core selection at a glance; core, coil, total transformer loss, and temperature rise calculations; transformer design examples in major topologies; DC Current Biased Inductor Design -- Design of inductors carrying DC bias currents using ferrite, MPP, Koolmu, and powered iron cores; Magnetic Amplifier, Snubber Designs, and ResonantConverters; Feedbak Look Stabilization; Critical Polaroid Waveforms in Major Topologies.

Reed switch - A reed switch is an electric switch that consists of a pair of ferrous metal contacts in a hermetically sealed glass envelope. A magnetic field from a permanent magnet or an electromagnet in close proximity to the switch will cause the contacts to pull together, thus completing an electrical circuit.

HSDL-9100-021 proximity sensor - The HSDL-9100-021 proximity sensor allows phones to automatically switch to speakerphone mode and is made by Agilent Technologies, Inc..

Big Red Switch - Big Red Switch (BRS) is a hacker term for the shutdown button or power switch on a computer, especially the red "Emergency Pull" switch on IBM mainframe operator consoles. (The term has also sometimes been used for the power switch on IBM PCs: "This !

Panel switch - The Panel telephone switch was an early type of automatic telephone exchange, first put into service in the 1920s. While the Strowger (step-by-step) switch moves synchronously with the dial pulses that come from the telephone dial, the Panel switch allows one digit of dial-ahead.

proximityswitch

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