Here is a simple 12V power supply circuit is easily constructed without the circuit board at all. Simply, by connecting the inter-connection as schematically attached using cables or wires are properly shielded hardware. A beginner can assemble a 12V power supply schematic is well in half an hour.
12V power supply circuit uses a transformer as a 0-15V 3A AC input. Unregulated DC power supply voltage through a component built diode bridge and capacitor electrolyte. To obtain a regulated DC voltage required a 12V zener diode and a 2N3055 transistor with the maximum load current capability 3A. Thus, the power supply circuit providing fixed output voltage 12V.
12V Power Supply Circuit
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