First you need a step down transformer. A step down transformer has less turns of copper in secondary then in primary. You can calculate with this formula
# of primary turns/Voltage of Primary= # of secondary turns/Voltage of secondary
When you know 3 factors, you can easily find out the forth one by easy mathematical calculation
From a step down transformer the 12 V AC output, needs to be converted into 12 V DC by a simple reverse bias or diode
A diode does a HALF-WAY RECTIFICATION
which means it allows one way of current, cut downs the reverse that is AC Current in which change of polarity takes place
or
a diode rectifies AC to DC or unidirectional current
There are a variety of ways to do it but it is vital to note that a transformerless power supply is not isolated from the mains supply. Anything that is attached to it will also not be isolated from the mains supply.
The simplest method is to use a half wave rectifier followed by a resistive network to drop the voltage to a suitable level. This is a solution where minimal current is required as the power dissipated by the resistor network will be about 20 times the power used by the low voltage load. Efficiency with this method will be around 5%.
More complex solutions use switching circuits such as buck converters. These can be much more efficient (95% in some cases) and are able to provide good voltage stability.
It is vital that any design that connects directly to any mains supply is supplied by a qualified and experienced designer and is used only for applications where users will not be exposed to any part of the circuit. Getting it wrong can have fatal consequences.
You will need to use a step down transformer with a full wave rectifier. The rectifier is a series of diodes installed in such a manner so that when alternating current is introduced through it's pathway it becomes a direct current one direction. The diodes are basically check valves that allow flow in one direction, which prevents the return cycle pathway of the alternating electrons to return. Therefore it has only one direction in which to achieve it's ultimate goal, to reach ground. The item that has developed most recently in this field is the VFD's or variable frequency drive. Coming in multitude of configurations from phase conversion to motor drives and can be purchased through most home improvement stores. Smaller versions should be available through most electronic suppliers {Zack-its, Radio Shack, etc..} but are limited in size.
You need a power inverter or a mechanical motor-generator.
Use Inverter Use Inverter
Input: 110-240V AC, Output: 12V DC, 3.7A
No, you cannot use a 50 amp automotive relay with a 12V DC coil to control 12V AC 500 watt halogen lighting. Automotive relays are designed to work with DC power, not AC power. Additionally, the amp rating of the relay refers to its capacity for DC load, not AC load. You should use a relay specifically designed for AC applications with the appropriate voltage and current ratings.
Yes, fluorescent lamps may be powered by DC but they need a DC lamp controller instead of an AC ballast and starter. The DC lamp controller is more complex. I have a 12V lantern with fluorescent lamp tubes.
It is certainly unsafe.
No, 3200 ma = 3.2 amps
DC 12V power supply can convert 110/220V AC power source to 12V DC.
NAVEED45
If you want to convert 24v AC into 12v Ac, it's simple. Just get a transformer to convert 24 volts into 12 volts. This is called a stepdown transformer. If you want to convert 24v DC into 12v DC, it's more complicated. First you have to change the 24v DC into 24v AC by a switching converter that changes DC into AC. Then you would use a stepdown transformer as in the former example. Once the 24v AC is converted to 12v AC, then you use a rectifier bridge to change the 12v AC into 12v DC.
AC or DC? AC - use a transformer, DC - forget it - not simple or cheap.
AC or DC? AC - use a transformer, DC - forget it - not simple or cheap.
ful circut diagram ac to dc adapter 12v dc
The purpose of rectifiers is to change AC to DC.
If it is AC, a transformer. If it is DC, a motor generator.
yes you can, but the cost is double the convertion of voltage 110 to 220 volts. all what you need is to convert to dc then from dc back again to ac with any rate you like
depends on your load...
You can make this conversion if a full wave bridge rectifier is used. Make sure that the diodes are rated for the voltage that is being used.
You would need a 12VDC to 120VAC power supply.