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Name

... 3. The current in the heating element of an electric iron is 5.0 A. If the iron dissipates 590 W of power, what is the voltage across it? Asnwer: V = P/I = 590 W/5A = 120 V ...
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Chapter 4

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... source FETs, generating the regulated negative rail required for FET gate biasing whilst operating from a single supply. This negative bias, at -3 volts, can also be used to supply other external circuits. ...
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... This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only. ...
Biofeedback Tension Monitor
Biofeedback Tension Monitor



... The Intensity Control Block gives voltage input to the PWM Controller Circuit. PWM controller circuit triggers the constant current boost IC (TPS926920) then it is given to the constant current IC via Mosfet Circuit. Mosfet is a voltage controlled device. Finally, the output of the constant current ...
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... The comb has more negative charge than positive charge. Negative charges move from the hair onto the comb. The hair has less negative charge than positive charge. This means the hair becomes positively charged overall. This means the comb becomes negatively charged. 2 Predict how two charged objects ...
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... where VTRIP is the tripping voltage of the current comparator. Therefore, the tripping current is directly related to RL. When using large gauge magnetic wire, RL is can be controlled within reason. The diameter of the wire has a 1% tolerance, resulting in only 2% tolerance in the resistance per uni ...
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... Typical value for 0 – 100 % load variation, at constant line input and temperature conditions. Typical value for input voltage variation within 360 – 440 VAC, at constant load and temperature conditions. Typical recovery time to within <  5 % band of set value for a load step 10 – 90 %, ohmic load, ...
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ACS754SCB-200 - Allegro Microsystems

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THAT Corporation Design Note 128

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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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