Category: AC Voltage Stabilizer

Auto Cut Circuit for Over and Under Voltage

Engineeering Projects
auto cut circuit for over/under voltage

The project “Auto Cut Circuit for Over and Under Voltage” is designed to protect electrical and electronic devices from over and under voltage which ensures a long lifespan of this device. An “Auto Cut Circuit for Over and Under Voltage” has been presented here serving multiple purposes for security; under-voltage protection, over-voltage protection, auto reset, auto cut off, and regulation. Circuit Description of Auto Cut Circuit for Over and Under Voltage The circuit diagram of “Auto Cut Circuit for Over and Under Voltage” is shown in figure 1. The entire…

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Auto Cut for Manual Stabilisers using 741 IC

Engineeering Projects
auto cut system for manual stabiiser

Many circuits have been published about the auto-cut arrangement in manual stabilisers. These circuits generally use transistors with zener diodes as the only sensing device. However, these circuits have two main drawbacks. Spurious triggering of the transistor Fluctuation in zener diode Circuit Description of Auto cut for manual Stabilisers The circuit of auto cut for manual stabilisers described here overcomes spurious triggering of transistor and fluctuation in zener diode drawbacks. It uses the most versatile op-amp IC741 a schmitt trigger. The reference voltage is given by a combination of 4.6V,…

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AC Voltage Stabilizer Circuit using 556 IC

Engineeering Projects
AC voltage stabilizer circuit

AC Voltage Stabilizer Circuit using 556 IC Various types of AC voltage stabilizer circuits had already been posted on bestengineeringprojects.com like Versatile Auto Cut-off Unit Automatic Voltage Stabilizer Circuit Overvoltage Protection Circuit The circuit posted here is a cheap, versatile, and high-performance AC voltage stabilizer using dual timer IC 556 IC. The circuit makes use of most of the features of dual timer IC 556, namely, the four voltage level comparators, two high current sourcing/sinking outputs, two discharge transistors, and the ability to provide hysteresis with the help of its…

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Automatic Voltage Stabilizer Circuit

Engineeering Projects
circuit diagram of automatic voltage stabilser

The project posted here is called an automatic voltage stabilizer circuit which solves almost all problems faced in the normally available stabilizer efficiently. With the help of the automatic voltage stabilizer circuit, we can keep the constant voltage at 230V when the voltage goes low as 170V and high as 250V automatically. The working strategy of the Automatic Voltage Stabilizer Circuit The working strategy of the circuit is very simple, this circuit energized one relay at a time from 170V AC upwards, and all relays and energized when 230V AC…

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Overvoltage Protection Circuit

Engineeering Projects
circuit diagram of over-voltage protection circuit

Multiple appliances have been born to ease human efforts. And in the same run, numerous protective circuits are designed to ensure a long lifespan of those devices. We have seen those circuits claiming to protect appliances like refrigerators and air-conditioners from voltage fluctuations and brown-outs. An overvoltage protection circuit has been presented here serving multi-purpose security; under-voltage protection, switch-on delay, and regulation. Description of Overvoltage Protection Circuit Do not get worried with the overvoltage protection circuit diagram, though it looks complex, the circuit comprises building blocks we have been familiar…

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Versatile Auto Cut -Off Unit

Engineeering Projects
auto cut off circuit

A versatile auto cut-off facility is necessary for all the mains operated equipment and voltage stabilizers (automatic as well as manual) to switch them off when the voltage shoots above or falls below a certain safe level. The cut-off facility available in most commercial stabilizers is so abrupt that they switch off the moment the voltage goes beyond a predetermined window (normally, 180V to 250V) and switch on immediately after the voltage fall within the calibrated range. Introduction to Versatile Auto Cut-Off Unit Power interruptions are quite frequent at times…

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