220v AC to 12v DC circuit without Transformer, Without transformer ac to dc converter.
( How to convert ac to dc without transformer ) 220v to 12v converter.
This is a transformerless power supply using a 1.4uf or 2.2uf X-rate Capacitor. plz, don't touch the circuit because 220V AC damages you.
Components used in this project:
1. 1.4uf/400V X- Rteted capacitor
2. Rectifier 5A or 10A
3. 4.7uf/100V Capacitor
4. 0.22 Ohm / 5W Resistor
5. 1M Resistor
6. 12V/2W Zener Diode x2
12V DC to 220V AC Converter [Tested Circuit]
Inverters are often needed at places where it is not possible to get AC supply from the Mains. An inverter circuit is used to convert the DC power to AC power. Inverters can be of two types True/pure sine wave inverters and quasi or modified inverters. These true/pure sine wave inverters are costly, while modified or quasi inverters are inexpensive.
These modified inverters produce a square wave and these are not used to power delicate electronic equipment. Here, a simple voltage driven inverter circuit using power transistors as switching devices is build, which converts 12V DC signal to single phase 220V AC.
Principle behind this circuit
The basic idea behind every inverter circuit is to produce oscillations using the given DC and apply these oscillations across the primary of the transformer by amplifying the current. This primary voltage is then stepped up to a higher voltage depending upon the number of turns in primary and secondary coils.
A 12V DC to 220V AC converter can also be designed using simple transistors. It can be used to power lamps up to 35W but can be made to drive more powerful loads by adding more MOSFETS.
The inverter implemented in this circuit is a square wave inverter and works with devices that do not require pure sine wave AC.
Working
The circuit can be divided into three parts: oscillator, amplifier and transformer. A 50Hz oscillator is required as the frequency of AC supply is 50Hz.
This can be achieved by constructing an astable multivibrator which produces a square wave at 50Hz. In the circuit, R1, R2, R3, R4, C1, C2, T2 and T3 form the oscillator.
Each transistor produces inverting square waves. The values of R1, R2 and C1 (R4, R3 and C2 are identical) will decide the frequency. The formula for the frequency of square wave generated by the astable multivibrator is
The inverting signals from the oscillator are amplified by the Power MOSFETS T1 and T4. These amplified signals are given to the step-up transformer with its center tap connected to 12V DC.
The turn ratio of the transformer must be 1:19 in order to convert 12V to 220V. The transformer combines both the inverting signals to generate a 220V alternating square wave output.
By using a 24V battery, loads up to 85W can be powered, but the design is inefficient. In order to increase the capacity of the inverter, the number of MOSFETS must be increased.
12v DC to 220v AC Converter Circuit Using Astable Multivibrator
Inverter circuits can either use thyristors as switching devices or transistors. Normally for low and medium power applications, power transistors are used. The reason for using power transistors is that they have very low output impedance, allowing maximum current to flow at the output.
One of the important applications of a transistor is switching. For this application, the transistor is biased in saturation and cut-off region.
When the transistor is biased in saturation region, both the collector emitter and collector base junctions are forward biased. Here the collector emitter voltage is minimum and collector current is maximum.
Another important aspect of this circuit is the oscillator. An important use of the 555 Timer IC is in its use as an astable multivibrator.
An astable multivibrator produces an output signal which switches between the two states and hence can be used as an oscillator. The frequency of oscillation is determined by the values of capacitors and resistors.
220v AC to 12v DC circuit without Transformer, Without transformer ac to dc converter.
( How to convert ac to dc without transformer ) 220v to 12v converter.
This is a transformerless power supply using a 1.4uf or 2.2uf X-rate Capacitor. plz, don't touch the circuit because 220V AC damages you.
Components used in this project:
1. 1.4uf/400V X- Rteted capacitor
2. Rectifier 5A or 10A
3. 4.7uf/100V Capacitor
4. 0.22 Ohm / 5W Resistor
5. 1M Resistor
6. 12V/2W Zener Diode x2
12V DC to 220V AC Converter [Tested Circuit]
Inverters are often needed at places where it is not possible to get AC supply from the Mains. An inverter circuit is used to convert the DC power to AC power. Inverters can be of two types True/pure sine wave inverters and quasi or modified inverters. These true/pure sine wave inverters are costly, while modified or quasi inverters are inexpensive.
These modified inverters produce a square wave and these are not used to power delicate electronic equipment. Here, a simple voltage driven inverter circuit using power transistors as switching devices is build, which converts 12V DC signal to single phase 220V AC.
Principle behind this circuit
The basic idea behind every inverter circuit is to produce oscillations using the given DC and apply these oscillations across the primary of the transformer by amplifying the current. This primary voltage is then stepped up to a higher voltage depending upon the number of turns in primary and secondary coils.
A 12V DC to 220V AC converter can also be designed using simple transistors. It can be used to power lamps up to 35W but can be made to drive more powerful loads by adding more MOSFETS.
The inverter implemented in this circuit is a square wave inverter and works with devices that do not require pure sine wave AC.
Working
The circuit can be divided into three parts: oscillator, amplifier and transformer. A 50Hz oscillator is required as the frequency of AC supply is 50Hz.
This can be achieved by constructing an astable multivibrator which produces a square wave at 50Hz. In the circuit, R1, R2, R3, R4, C1, C2, T2 and T3 form the oscillator.
Each transistor produces inverting square waves. The values of R1, R2 and C1 (R4, R3 and C2 are identical) will decide the frequency. The formula for the frequency of square wave generated by the astable multivibrator is
The inverting signals from the oscillator are amplified by the Power MOSFETS T1 and T4. These amplified signals are given to the step-up transformer with its center tap connected to 12V DC.
The turn ratio of the transformer must be 1:19 in order to convert 12V to 220V. The transformer combines both the inverting signals to generate a 220V alternating square wave output.
By using a 24V battery, loads up to 85W can be powered, but the design is inefficient. In order to increase the capacity of the inverter, the number of MOSFETS must be increased.
12v DC to 220v AC Converter Circuit Using Astable Multivibrator
Inverter circuits can either use thyristors as switching devices or transistors. Normally for low and medium power applications, power transistors are used. The reason for using power transistors is that they have very low output impedance, allowing maximum current to flow at the output.
One of the important applications of a transistor is switching. For this application, the transistor is biased in saturation and cut-off region.
When the transistor is biased in saturation region, both the collector emitter and collector base junctions are forward biased. Here the collector emitter voltage is minimum and collector current is maximum.
Another important aspect of this circuit is the oscillator. An important use of the 555 Timer IC is in its use as an astable multivibrator.
An astable multivibrator produces an output signal which switches between the two states and hence can be used as an oscillator. The frequency of oscillation is determined by the values of capacitors and resistors.
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