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A LM317 commonly requires a heat sink to prevent the operating temperature from rising too high. For large voltage differences, the power lost as heat can ultimately be greater than that provided to the circuit. This is the tradeoff for using linear regulators, which are a simple way to provide a stable voltage with few additional components.
The Railroad Car Builder's Dictionary. Dover Publications. White, John H. (1978). The American Railroad Passenger Car. Baltimore, MD: Johns Hopkins University Press. ISBN 0801819652. OCLC 2798188. White, John H. Jr. (1993). The American Railroad Freight Car: From the Wood-Car Era to the Coming of Steel. Baltimore: Johns Hopkins University Press.
LM317: Adjustable 1.5 A positive voltage regulator (1.25 V-37 V) [62] LM120 LM320 Fixed 1.5 A negative voltage regulator (-5 V, -12 V, -15 V) [63] LM123 LM323 Fixed 3 A, 5-volt positive voltage regulator [64] LM325 Yes Dual ±15-volt voltage regulator [65] LM330 5-volt positive voltage regulator, 0.6 V input-output difference [66] LM333 Yes
Direct comparison between normal buffer (right) and high-performance buffer (left) for freight wagons. Standardised buffers are used by European railway companies: Freight wagon: Buffer with 75 mm stroke UIC 526-2 VE 1981-01. However, these buffers are no longer in use. Freight wagon: Buffer with 105 mm stroke UIC 526-1 VE 1998-07; Freight ...
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The AAR/APTA TypeE, TypeF, and TypeH couplers are all compatible Janney couplers, but used for different rail cars (general freight, tank cars, rotary hoppers, passenger, etc.). The knuckle coupler or Janney coupler was invented by Eli H. Janney , who received a patent in 1873 ( U.S. patent 138,405 ). [ 20 ]
Typical instrumentation amplifier schematic. An instrumentation amplifier (sometimes shorthanded as in-amp or InAmp) is a type of differential amplifier that has been outfitted with input buffer amplifiers, which eliminate the need for input impedance matching and thus make the amplifier particularly suitable for use in measurement and test equipment.