A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction.

What is a Step Down Transformer?

A Step-down transformer decreases the voltage incoming to the site by increasing the electrical current.

Convert 220VAC to 12VDC Power Supply projects

12VDC Power Supply projects

This diagram shows how to convert 220VAC to 12VDC Power Supply. In this circuit diagram, we use a 17v step-down transformer, a bridge rectifier, a fuse, a 50v capacitor, a voltage regulator ( LM7812 ), a DC LED indicator light, and a 1k resistor. First, we connect the transformer to the bridge rectifier then from the bridge rectifier to connect the capacitor and voltage regulator, and then to LED and resistor. Now this circuit is ready for use. If you want to see the clear connection of this diagram please check our YouTube video.

Diagram of Convert 220VAC to 12VDC Power Supply:

Circuit Components

17v Transformer [See Buy Click Amazon]
Bridge Rectifier [See Buy Click Amazon]
1000uf,50V Capacitor [See Buy Click Amazon]
2A Fuse [See Buy Click Amazon]
LM7812 voltage regulator [See Buy Click Amazon]
1k ohm Resistor [See Buy Click Amazon]
3mm LED [See Buy Click Amazon]

Components used to convert AC to DC power supply:

2A Fuse

A thermal Fuse or Thermal Cutoff is a Safety Device That Open Circuits Against overheating. It Detects the Heat Caused by the Over-Current Due to Short Circuits or Component Breakdown. Thermal Fuses do not Reset Themselves when the Temperature drops as a circuit breaker would. A Thermal fuse must be replaced when it fails or is Triggered. Thermal fuses only react to excessive temperature, Unlike electrical fuses or circuit breakers, not excessive Current, unless the excessive current is sufficient to cause the Thermal fuse Itself to heat up to the Trigger Temperature.

17v Transformer

Using a transformer, electric energy can be moved from one AC circuit to another. A transformer uses the electromagnetic induction principle to either increase or decrease the AC voltage (step-up or step-down). To lower the power in the circuits of low-voltage devices like doorbells, transformers are frequently utilized.

Bridge Rectifier

Single-Phase Single In-Line Bridge Rectifiers.General purpose use in AC/DC bridge full wave rectification for switching power supply, home appliances, office equipment, and industrial automation applications.

1000uf,50V Capacitor

The capacitor is a Two-Terminal passive component having the Property of Capacitance. This Property Electrifies (charging with electricity) Capacitors with input Voltage. Capacitors Condense Electricity, Hence it is also known as a Condenser. It consists of two Electrical Conductors that are Separated by Distance. The Capacitor Stores Charge and can act like a Battery. It is necessary for filter Circuits to Minimize voltage spikes, and Smoothing changes in voltage.

LM7812 Voltage Regulator

A Voltage Regulator Allows the Alternator to Make Enough Power to Run the Devices on a Vehicle. However, it only Uses The Power Necessary for the Devices. When a Regulator Fails, The Limits On How Much Power An Alternator Can Produce Disappear. A heat Sink Should be Attached to a Voltage Regulator to dissipate Excess Power that may Enter into The Regulator. This prevents excess Voltage From Destroying and Overheating the Voltage Regulator Since the Heat Sink Dissipates the Excess Power as heat.

Resistor 1kohm

A Resistor is an electrical component that controls the flow of electricity in an electrical circuit. Or we can say in this way that the material or component That is used to block the flow of current in electronic equipment is called a Resistor. And, because of the characteristic of the resistor or conductor that Prevents the flow of current through the conductor, that characteristic or religion is called resistance, where resistance Means the ability to block. The main function of a resistor is to cause a voltage drop to impede the flow of current in the circuit. In this case, the question may arise as to which circuit or which Parts need to be protected from low voltage or current flow.

3mm LED

Light Emitting Diode (LED) Indicator lamps are a type of LED (Light Emitting Diode) lamp used to Display When a Change Occurs in an Electrical Circuit. When Something has Malfunctioned in an Electrical System, a red or Orange Light light-emitting diode Indicator Lamp may be used to alert a Worker. LED Indicator Lamps Usually consist of a single Bulb. Pilot lights and Light Emitting Diode indicator lights Indicate Lights for Machines or Instruments and they can also be built into Switches. They Provide Solutions for a Variety of Requirements and Are ideal for Highly Reliable Indications.