This low AC voltage is converted to pulsating DC voltage using a bridge rectifier.
Since the secondary coil has a lesser number of turns, the voltage across the secondary is less than the voltage across the primary for a step-down transformer. A transformer is a device with two windings –primary and secondary, wherein the voltage applied across the primary winding, appears across the secondary winding by the virtue of inductive coupling. AC voltage from the supply at 230V is first stepped down to low voltage AC using a step-down transformer.So let us have a brief theoretical idea about how AC voltage is converted into regulated DC voltage. For this reason, the only way we have is to convert the AC voltage supply at our homes to the required DC voltage.Īll we need is to convert this AC voltage into DC voltage. We can use simple batteries to provide the voltage, but the major problem with batteries is their limited lifetime. Most of the circuits or electronic devices require a DC voltage for their operation. Solution: You all must be aware of the regulated DC power supply. Problem Statement: Design a regulated DC power supply of 5V which can be used to run a LED, using AC voltage as the input. Let us a basic example and the step by step rules in building the circuit. We need a few more components that help in the proper flow of charge and process the charge supplied by the source such that an appropriate amount of charge flows to the load.Ī basic Example – Regulated DC Power Supply to run an LED However, it is not possible to build a circuit just with a source and a load. This voltage may be a constant DC voltage or an AC voltage. Each load requires a certain current or voltage to start its operation. All these devices-a lamps, a motor, LED are what we call as loads. At times we may need to glow a lamp, run a motor, etc.
There can be many reasons why we need to build a circuit. Some require an external source of energy, some supply energy. Some may provide a hindrance to the flow of charge, some simple store, or dissipate the charge.
However this circuit consists of several components that affect the flow of charge in many ways. When this charge flows from the positive terminal, through the loop, and reaches the negative terminal, the circuit is said to be completed. For an electronic circuit, the matter carried is the charge by electronics and the source of these electrons is the positive terminal of the voltage source. A circuit is any loop through which matter is carried.
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