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Electricity
Electricity

Instrumentation and Resistor Circuits Physics 517/617 Experiment 1
Instrumentation and Resistor Circuits Physics 517/617 Experiment 1

CIRCUIT FUNCTION AND BENEFITS CIRCUIT DESCRIPTION
CIRCUIT FUNCTION AND BENEFITS CIRCUIT DESCRIPTION

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Solution Derivations for Capa #7
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1N4148-1 - Microsemi
1N4148-1 - Microsemi

... Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and temperature. Average Rectified Forward Current: The output current averaged over a full cycle with a 50 Hz or 60 Hz sine-wave input and a 180 degree conduction angle. Reverse Recovery Time: The time in ...
Current, resistance and electromotive force
Current, resistance and electromotive force

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basic electricity: ohm`s law - Saint Leo University Faculty
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original article

... you should be able to deduce the salient points. Because the polarity of the flashgun is not known for certain, it is rectified by Q2. Q3 is an ultra-low current reference diode such as the MAX6009A or an ultra-low leakage zener diode such as the BZX399-C3V6. The value of R3 has to be chosen with ca ...
ElectronicsLab6.pdf
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Document
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TRIAC



TRIAC, from triode for alternating current, is a genericized tradename for an electronic component that can conduct current in either direction when it is triggered (turned on), and is formally called a bidirectional triode thyristor or bilateral triode thyristor.TRIACs are a subset of thyristors and are closely related to silicon controlled rectifiers (SCR). However, unlike SCRs, which are unidirectional devices (that is, they can conduct current only in one direction), TRIACs are bidirectional and so allow current in either direction. Another difference from SCRs is that TRIAC current can be enabled by either a positive or negative current applied to its gate electrode, whereas SCRs can be triggered only by positive current into the gate. To create a triggering current, a positive or negative voltage has to be applied to the gate with respect to the MT1 terminal (otherwise known as A1).Once triggered, the device continues to conduct until the current drops below a certain threshold called the holding current.The bidirectionality makes TRIACs very convenient switches for alternating-current (AC) circuits, also allowing them to control very large power flows with milliampere-scale gate currents. In addition, applying a trigger pulse at a controlled phase angle in an AC cycle allows control of the percentage of current that flows through the TRIAC to the load (phase control), which is commonly used, for example, in controlling the speed of low-power induction motors, in dimming lamps, and in controlling AC heating resistors.
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