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The Transfrormer
The Transfrormer

... terminals of like polarity. Consider the two windings shown in Fig.3.7a. Terminals 1 and 3 are identical, because currents entering these terminals produce fluxes in the same direction in the core that forms the common magnetic path. For the same reason, terminals 2 and 4 are identical. If these two ...
Transfrormer_Handouts
Transfrormer_Handouts

... terminals of like polarity. Consider the two windings shown in Fig.3.7a. Terminals 1 and 3 are identical, because currents entering these terminals produce fluxes in the same direction in the core that forms the common magnetic path. For the same reason, terminals 2 and 4 are identical. If these two ...
Fiber Optic A/D Kit - Industrial Fiber Optics
Fiber Optic A/D Kit - Industrial Fiber Optics

... now enjoy the pristine clarity of high-definition TV and CD audio. Soon it will provide services that would have been impractical without it: secondary education classes in the comfort of your home, a paper-less, environmentally clean “newspaper”, even faster computer communications, and remote util ...
Transformer: Principles and Practices
Transformer: Principles and Practices

... There are many devices such as three-phase ac generator, transformer etc., which are usually used in a power station to generate and supply electrical power to a power system network. In the power station, the three-phase ac generator generates a three-phase alternating voltage in the range between ...
LAMPIRAN A FOTO WIRELESS SERVICE BELL
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... ent packages so as to pair with the 2 series of encoders. The decoders receive data that are transmitted by an encoder and interpret the first N bits of code period as addresses and the last 12-N bits as data, where N is the address code number. A signal on the DIN pin activates the oscillator which ...
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Capacitors in Series and Parallel
Capacitors in Series and Parallel

... • Identify series and parallel parts in the combination of connection of capacitors. • Calculate the eective capacitance in series and parallel given individual capacitances. Several capacitors may be connected together in a variety of applications. Multiple connections of capacitors act like a sin ...
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Power Electronics - Talking Electronics
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Capacitors in Series and Parallel
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... • Identify series and parallel parts in the combination of connection of capacitors. • Calculate the eective capacitance in series and parallel given individual capacitances. Several capacitors may be connected together in a variety of applications. Multiple connections of capacitors act like a sin ...
ZXLD1374
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Theoretical systems of triboelectric nanogenerators
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... the position of this dielectric surface, inducing electrons to transfer between the metal electrodes under short circuit conditions. This is the core working mechanism of triboelectric generators and different TENG fundamental modes can be classified based on the changing behavior of these two capaci ...
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... equipment provides industry with a valuable and versatile tool. ESAB cutting machines are designed to provide both operation safety and efficiency. However, as with any machine tool, sensible attention to operating procedures, precautions, and safe practices is necessary to achieve a full measure of ...
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AN437, RC snubber circuit design for TRIACs.pdf

... Fast voltage variations can create a gate current (IG), due to the junction capacitance between A2 and the gate, and could trigger the TRIAC. The maximum rate of rise of offstate voltage that a TRIAC is able to withstand without turning on is called the static dV/dt. A spurious triggering due to sta ...
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... capacitor, C, shunts residual radio frequencies to ground (earth) leaving only the audio frequency modulation. Capacitor, C, also exhibits a reservoir action enabling the audio frequency voltage to approach its peak value. The diode and, indeed, any other a.m. demodulator, is called a detector, a ha ...
Shielded Metal Arc Welding (SMAW) - Part A
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... direction during the next half cycle. The rate at which this alternating occurs is measured as cycles per second, with 60cycle AC being the most common in North America. ...
Section 3: Switching Regulators
Section 3: Switching Regulators

... The primary limitations of switching regulators as compared to linear regulators are their output noise, EMI/RFI emissions, and the proper selection of external support components. Although switching regulators do not necessarily require transformers, they do use inductors, and magnetic theory is no ...
LP5912 500-mA Low-Noise, Low-IQ LDO (Rev. D)
LP5912 500-mA Low-Noise, Low-IQ LDO (Rev. D)

... Short-circuit current (ISC) is equivalent to current limit. To minimize thermal effects during testing, ISC is measured with VOUT pulled to 100 mV below its nominal voltage. Reverse current (IRO) is measured at the IN pin. Quiescent current is defined here as the difference in current between the in ...
- Spiral - Imperial College London
- Spiral - Imperial College London

... allowable bounds) and the active power consumed by them modulated. The series combination of the ES and the noncritical load thus acts as a ‘Smart Load’ which ensures tightly regulated voltage across the critical load while allowing its own power consumption to vary and thereby, participate in deman ...
MAX220–MAX249 +5V-Powered, Multichannel RS
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Spark-gap transmitter



A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""
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