charging of a capacitor
81Resistor–transistor logic — (RTL) is a class of digital circuits built using resistors as the input network and bipolar junction transistors (BJTs) as switching devices. RTL is the earliest class of transistorized digital logic circuit used; other classes include… …
82Solar inverter — Internal view of a solar inverter. A solar inverter or PV inverter is a critical component in a Photovoltaic system. It performs the conversion of the variable DC output of the Photovoltaic (PV) modules into a utility frequency AC current that… …
83Pulse forming network — A Pulse Forming Network (PFN) accumulates electrical energy over a comparatively long time, then releases the stored energy in the form of a relatively square pulse of comparatively short duration for various pulsed power applications. In… …
84Capacitance multiplier — A capacitance multiplier is a transistor configured such that it acts to multiply the value of the capacitor connected to its base by an amount equal to the transistor s current gain (β). This circuit is usually found in DC power supplies where… …
85Fingerprint recognition — or fingerprint authentication refers to the automated method of verifying a match between two human fingerprints. Fingerprints are one of many forms of biometrics used to identify an individual and verify their identity. This article touches on… …
86Automatic watch — An automatic or self winding watch is a mechanical watch, whose mainspring is wound automatically by the natural motion of the wearer s arm, to make it unnecessary to manually wind the watch. Most mechanical watches sold today are self winding.… …
87Wii Remote — with original strap Manufacturer Nintendo Generation Seventh generation era Retail availability Nove …
88History of electromagnetism — The history of electromagnetism, that is the human understanding and recorded use of electromagnetic forces, dates back over two thousand years ago, see Timeline of electromagnetism. The ancients must have been acquainted with the effects of… …
89Honeywell v. Sperry Rand — Honeywell, Inc. v. Sperry Rand Corp., et al. 180 USPQ 673 (D. Minn. 1973) (Case 4 67 Civil 138, 180 USPO 670) was a landmark U.S. federal court case that in April 1973 invalidated the 1964 patent for the ENIAC, the world s first general purpose… …
90Electroluminescent wire — (often abbreviated to EL wire) is a thin copper wire coated in a phosphor which glows when an AC voltage is applied to it. It can be used to decorate vehicles or structures, much as rope light or Christmas lights are often used. Unlike these… …
