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Operational amplifier 741 as Wein bridge Oscillator
Operational amplifier 741 as Wein bridge Oscillator

... Description :- Fig-1 or Fig-2 is the circuit of the Wien bridge oscillator ( as these two circuits are same). A resistor R4 is connected to the inverting terminal (2) of the operational amplifier from the ground. Similarly a parallel combination of a resistance R2 and a capacitor C2 is connected to ...
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Electrical ballast



An electrical ballast is a device intended to limit the amount of current in an electric circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.Ballasts vary in design complexity. They can be as simple as a series resistor or inductor, capacitors, or a combination thereof or as complex as electronic ballasts used with fluorescent lamps and high-intensity discharge lamps.
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