Linear power supply, physics, Basic Statistics

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Linear Power Supply
Uses a transformer to convert voltage from the mains (wall outlet) to a different voltage.
With a transformer present, almost any voltage can be obtained.
If a transformer isn’t present, the output voltage cannot exceed the input voltage.
Output voltage is regulated by dissipating excess power as heat in an efficiency of 30-40%
Risk of damaging equipment is very low unless a short occurs between the primary and secondary windings.

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