Teach-In 2019 Powering Electronics Part 2: Transformers and rectifiers

摘要

Your project is finished and ready to go, but the job isn't done until you've found an appropriate source of power. This could be as simple as choosing a suitably rated mains adapter or as complex as designing a switched-mode power supply with multiple outputs and battery backup. Our latest series - Teach-in 2019 - is here to help, and will provide you with insight into all aspects of powering your electronic projects and designs. In this second part we introduce conventional (linear) power supplies and the three building blocks that work together to produce a constant DC output when supplied from an AC mains source. Our Teach-In Practical Project takes the form of a raw DC supply capable of delivering 18V at 0.5A. This handy module has been designed for use in conjunction with several upcoming projects, including fixed and variable bench power supplies and a high-voltage supply based on switching technology.