5 Amp Power Supply Circuit: 12v

Best for: Efficiency, low heat, compact size.

A 2.2k ohm resistor across the main capacitor will safely discharge the stored energy when the unit is turned off. Summary Table Value/Rating Transformer 15V-18V AC, 6A+ Bridge Rectifier Main Filter Cap 15,000µF, 35V Pass Transistor TIP2955 (PNP) 12v 5 amp power supply circuit

Here’s a useful description, typically based on the LM338 (or similar) linear regulator or a switching (SMPS) design. I’ll give you both approaches. Best for: Efficiency, low heat, compact size