This the schematic diagram of 12V 20A dc power supply. Output voltage is finely adjustable potentiometer from 12V to 15V. The rectifier is suitable for feeding all 12V devices, or devices that are typically connected to a 12V battery, or the vehicle 12V power supply system. This voltage is typically 13.8 V. For this reason, the rectifier is set to this tension, OK is any voltage from 12V to 14V. In this case, the voltage is set somewhere around 13.6 V. This voltage is provided for use in addition to the voltage regulator 78S12. Instead of the potentiometer 100R 56R resistor is inserted.
