100+ Power supply circuit diagram with PCB - ElecCircuit Many ideas of 12V and 5V Dual Power Supply Circuit Diagram at 3A max; Low volts. 1 /3V Adapter (USB to 1 or 3V converter circuit) Small uninterruptible UPS; A lot of 6V supply diagrams; Simple DC Regulators 12V,15V,30V; 5V power supplies Digital power supplies. Digital DC Regulator If you are looking for 5V DC power supply for the digital High Current 12V-13 at 30A,25A,20A,15A Power Supply Here is a high current 13 power supply circuit. What for? Those who want to use a car radio transmitter in the house. You should use a 12V/13 Ham Radio power supply. It is a better way if be a High power out of 5A to 30A according to the size of the transmitter. And I highly recommend this high-current power supply circuit.