Dual rails refer to the +12V
rail(s). Essentially, having a
dual(or quad)
rail design splits the total +12V amperage capability among four circuits. This can allow for safer operation because you're not forcing loads of
power through a single
rail.
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Dual Power Supply Characteristics
While it does provide two separate voltages, one positive and one negative, the power supply itself is still a singular source. The difference here, for example, is you have access to both +12 volts and -12 volts simultaneously from a singular source.Apr 24, 2020
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For a quick and simple dual power supply, use two resistors in series connected in parallel with two capacitors. Connect the two ends to the battery or power source and BAM! You have a dual power supply.
