Using a voltage regulator (LM78XX come to mind), or through Pulse Width Modulation.
In the first case, the typical output power will be at 4W tops (LM78XX are typically rated at around 1A of current). In the second case it's up to the design of the PWM circuit, I guess.
A simple PWM circuit would include an oscillator (or a square signal generator, doesn't matter) driving a transistor in a predictable pattern (turning it on for 1/3rd of the time), the aforementioned transistor, and a capacitor to smooth the ripples out. If for 1 out of 3 seconds it's 12V, and for the remaining 2 seconds it's 0V, then (12+0+0)/3 = 4V. The current rating would depend on the load and the transistor's ability. For higher loads it may be advisable to drive a second-stage, high current transistor. Also, saturation concerns come to mind, but that's a different story.
There is a third option, but it's overkill in this situation -- using a transistor and a capacitor to form a resonant circuit driving a transformer. However, this type of design is typically found in applications where the voltage needs to be stepped up, not down (ie. LCD/keyboard backlights, cold-cathode lights and the like).
To convert watts to amps, you can use the formula: Amps = Watts / Volts. In this case, to convert 200 watts at 12 volts to amps, it would be: 200 watts / 12 volts = 16.67 amps. So, 200 watts at 12 volts is approximately 16.67 amps.
No, a 220 volts AC fan cannot run directly from a 12 volts battery. The fan requires a much higher voltage to operate efficiently. You would need a power inverter to convert the 12 volts from the battery to 220 volts AC to power the fan.
To convert 110 kVA at 440 volts to amperes, you can use the formula: Amperes = kVA / (Volts x 1.73) for three-phase systems. In this case, 110 kVA / (440 volts x 1.73) ≈ 143.37 amperes.
Modifying a 240 volt appliance to run on 12 volts is not recommended due to significant differences in voltage requirements and power consumption. The appliance would likely require a complete overhaul of its internal components, which can be complex and potentially unsafe. It is safer and more efficient to use a power inverter to convert 12 volts to 240 volts for the appliance.
To convert amps to watts in a 12-volt application, you can use the formula: Watts = Volts x Amps. Therefore, in a 12-volt circuit, if you have 1 amp of current, the power consumption would be 12 watts (12V x 1A).
To convert watts to amps, you can use the formula: Amps = Watts / Volts. In this case, to convert 200 watts at 12 volts to amps, it would be: 200 watts / 12 volts = 16.67 amps. So, 200 watts at 12 volts is approximately 16.67 amps.
Volts cannot be converted to amps. If you mean convert 220v to 12 volts output, then you need a 220v to 12 v step down transformer with the VA or watt rating you require.
If it is AC voltages you need to convert, you need to find a transformer to do this job. Without knowing the application it is hard to guess what you are trying to do.
No, a 220 volts AC fan cannot run directly from a 12 volts battery. The fan requires a much higher voltage to operate efficiently. You would need a power inverter to convert the 12 volts from the battery to 220 volts AC to power the fan.
5000 volts
To what?
12 volts
If it is AC then you don't need a formula, you just need a transformer.
To convert 110 kVA at 440 volts to amperes, you can use the formula: Amperes = kVA / (Volts x 1.73) for three-phase systems. In this case, 110 kVA / (440 volts x 1.73) ≈ 143.37 amperes.
12 Volts.
12 va These are two different entities. Its like asking how much water will flow with pressure. With the following formula W = Amps x Volts you can see the relationship they have with each other, the end product resulting in Watts.
Yep. It is called an inverter to convert 12 volts to 110 volts AC. Get one that will supply the amp needed for the microwave.