Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

All voltage sources cannot able to give fixed output due to fluctuations in the circuit. For getting constant and steady output, the voltage regulators are implemented. The integrated circuits which are used for the regulation of voltage are termed as voltage regulator ICs. Here, we can discuss the IC 7805.The voltage regulator IC 7805 is actually a member of the 78xx series of voltage regulator ICs. It is a fixed linear voltage regulator. The xx present in 78xx represents the value of the fixed

What is a Voltage Follower?A voltage follower (also known as a buffer amplifier, unity-gain amplifier, or isolation amplifier) is an op-amp circuit whose output voltage is equal to the input voltage (it “follows” the input voltage). Hence a voltage follower op-amp does not amplify the input signal and has a voltage gain of 1.The voltage follower provides no attenuation or amplification—only buffering.A voltage follower circuit has a very high input impedance. This characteristic makes it a popul

What is a Voltage Source?A voltage source is defined as a device that delivers electric power to a connected circuit. In simpler terms, it’s like a push force that keeps the electrons moving continuously through the wire it’s connected to. Think of it as a pump in a water system, only this pump is for electrons in a wire. This voltage source is commonly used in many electrical devices and systems.A voltage source usually comes as a two-terminal device, meaning it has two points for connection –

What is Voltage RegulationA voltage regulator is an electronic or electrical device that can sustain the voltage of power supply within suitable limits. The electrical equipment connected to the voltage source should bear the value of the voltage. The source voltage should be in a certain range which is acceptable for the connected pieces of equipment. This purpose is fulfilled by implementing a voltage regulator.A voltage regulator – as the same suggests – regulates the voltage, regardless of t

It is in actuality a modified capacitor filter circuit (rectifier circuit) which makes a DC output voltage that is two or more than two times the AC peak input. In this section, we can look into full-wave voltage doubler, half-wave voltage doubler, voltage tripler and finally quadrupler.Half Wave Voltage DoublerThe input wave form, circuit diagram and output waveform is shown in figure 1. Here, all through the positive half cycle, the forward biased D1 diode conducts and diode D2 will be in off

What is a Regulated Power Supply?A regulated power supply converts unregulated AC (Alternating Current) to a constant DC (Direct Current). A regulated power supply is used to ensure that the output remains constant even if the input changes.A regulated DC power supply is also known as a linear power supply, it is an embedded circuit and consists of various blocks.The regulated power supply will accept an AC input and give a constant DC output. The figure below shows the block diagram of a typica

What is DC Current?DC stands for Direct Current, although it is often called “DC Current”. DC current is defined as a unidirectional flow of electric charge. In DC current, the electrons move from an area of negative charge to an area of positive charge without changing direction. This is unlike alternating current (AC) circuits, where current can flow in both directions.DC current can flow through conducting material like wire and also flow through the semiconductors.The battery is a good examp

What is Open Circuit Voltage?When an open circuit condition is created in any device or circuit, the difference of electric potential between the two terminals is known as the open-circuit voltage. In network analysis, the open-circuit voltage is also known as the Thevenin Voltage. The open-circuit voltage is often shortened to OCV or VOC in mathematical equations.In open-circuit conditions, the external load is disconnected from the source. An electric current will not flow through the circuit.

A non-destructive test technique that may be used on conductive materials is eddy current testing. Adjacent to the test surface is a test coil that is powered by alternating current.Eddy currents are created in the test piece as a result of the alternating magnetic field which is produced. The test coil changes in a quantifiable way as a result of variances in eddy current flow. These modifications can be observed on a screen & analysed to find flaws.By keeping track of variations in impedan

What is DC Voltage?DC voltage stands for “Direct Current Voltage”. While this sounds confusing, the term “DC” has become used more broadly to refer to a system that has constant polarity. Hence DC voltage is a voltage that produces or would produce a DC current. Conversely, an AC voltage is a voltage that produces or would produce AC current.DC in this context refers more broadly to quantities that don’t regularly change polarity or that have zero (or effectively zero) frequency. AC refers to qu