A regulated power supply converts unregulated AC (Alternating Current) to a constant DC (Direct Current). A regulated power supply is used to ensure that the output remains constant even if the input changes. We know that there are different types of electrical & electronic circuits that use a DC power supply. In, we cannot use the DC batteries due to expensive as well as require replacement when discharged. In this situation, we require a circuit that can change the AC supply to the DC supply.
Hardware Required
Circuit Diagram
Working Explanation
This circuit brings regulated 12 Volt DC from a bridge rectifier and an IC7812. As we can see in this A transformer alters the AC mains voltage toward a necessary value and the main function of this is to step up and step down the voltage. The output of the transformer is a pulsating sinusoidal AC voltage, which is converted to pulsating DC with the help of a rectifier. This output is given to a filter circuit that reduces the AC ripples, here we have used a 100uF capacitor as a simple filter to remove large ac ripples from rectified DC. And the capacitor 0.1uF capacitor removes small size ac ripples from the regulated DC output.
Applications
- Mobile phone chargers
- Regulated power supplies in different appliances
- Various oscillators & amplifiers
