Build Your 0-15V 1A Power Supply Circuit Today

Description

This power supply circuit is remarkably straightforward to construct, utilizing readily available components and offering a cost-effective solution. It generates a stable and precisely controlled direct current output spanning from 0V to +15V, capable of delivering a maximum current of 1A. Regulation is achieved through the variable resistor R2. The core of the circuit employs a 2N3055 power transistor, Q1, which is essential for its functionality. Due to continuous operation at high currents, this transistor is mounted on a heatsink to dissipate heat effectively. A standard transformer, T1, is used as the power source, delivering 220V AC at 18V AC with a rating of 1.5A. The circuit incorporates a zener diode, D1, rated for 18V and 1.5W, providing overvoltage protection.

Circuit diagram

Parts list

More about components

The 1N4007 diodes, GR1, are silicon signal diodes commonly used for rectification and reverse polarity protection. These diodes allow current to flow in only one direction, safeguarding the circuit from damage due to reverse voltage conditions. They are typically used for converting AC to DC voltage.