In most of the situation the 7812 regulator IC can not produce more power output current. To rectify this problem you can use this 12v 3a power supply circuit.
Introduction
The following instructions will show you how to build a 12 Volt 3 Ampere DC Supply. Before that, I would like to outline what a power supply of a device is.
The electricity-giving to the device is called the power supply that plugs into electrical appliances.
It serves to change the voltage and current from a single source to such an amount which is appropriate for a device.. These devices are furthermore commonly called the electric power converters.
Power supplies are critically important for many electric devices. Electronic power supply circuits can be divided into smaller parts.
in which each one of them has its importance in ensuring that the power supply will function as it should. All facets of a power supply must be operational when it is being used, otherwise, it may face glitches.
12V 3A Power Supply Circuit Diagram
Components Required
To build the 12 Volt 3 Ampere Power Supply, you’ll need the following components:
- Step Down Transformer – 1
- NPN Power Transistor (2N3055) – 1
- Diode (1N4007) – 4
- Zener Diode (12V) – 1
- Resistor (680 ohms) – 2
- Capacitor (5000μF, 0.01μF) – 1, 1
Make sure you have these components ready before starting the circuit.
2N3055 Transistor pinout
| Also Check: Other Power Supply Circuits
