How to Design a Power Supply Circuit for Electronic Devices
Learn how to design a +12V regulated DC power supply circuit with LM7812, including components.
How to Design a Power Supply Circuit for Electronic Devices
A power supply circuit is crucial for converting AC mains power to a stable DC voltage suitable for powering electronic devices. A well-designed power supply ensures the delivery of consistent and clean voltage, protecting the device and ensuring its proper operation. In this article, we will explore the design of a +12V regulated DC power supply circuit capable of delivering up to 1 Amp of current. The circuit is based on the popular LM7812 voltage regulator, which is part of the LM78XX series of positive voltage regulators. The LM7812 provides a fixed +12V DC output with built-in short-circuit protection and thermal overload protection, making it ideal for various applications.
Circuit Components and Description The following components are essential for constructing this power supply circuit: Transformer (TX) : Steps down 230V AC mains to 12V AC at 1A. Bridge Rectifier : Converts AC to DC using four diodes (1N4007). Filter Capacitor : A 1000µF, 25V capacitor to smooth the rectified D…
About the author
Prasun Barua is a graduate engineer in Electrical and Electronic Engineering with a passion for simplifying complex technical concepts for learners and professionals alike. He has authored numerous highly regarded books covering a wide range of elec…
