Linear Power Supply 13.8V 20A
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A linear power supply has a transformer that steps down the line voltage to some voltage, a rectifier and a filter capacitor transform the low voltage AC into a moderately filtered DC that still is unregulated and has some ripple. Finally, a regulating circuit "burns off" the excess voltage, leaving only the exact amount desired at the output, typically 13.8V for communication equipment.One typical mistake made by many amateur designers is... [ more ]
