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What does a dual voltage power supply do?

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It convert 220v or 115 to -12v and +12v by using many components and step down transformer.
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Dual power supply?

Dual power supply is used to describe a computer system with twopower supply units (PSU's). This is to provide extra power for thecomputer's internal components.

How does a 'DC dual power' supply work?

  Dual conversion uninterruptible power supplies operate by converting incoming utility AC power to DC and then convert the DC back to AC power connected to the load.

What voltages are supplies by the power supply on your system?

  The power supply in a PC is a complex device using switch mode circuitry and transformers to generate +and- 12v, for modems and communications ports. +and-5volts for the

What do you Mean dual tracking power supply?

It's a power supply with a positive and negative voltage, where one of the voltages tracks the other. For example: the negative voltage tracks the positive. If you regulate th