Notice there is only one path: the perimeter of the box. At the bottom of the box, erase a small portion and drop a symbol in there for the power supply. Now you need to draw in at least one load so ...

When it comes to electrical circuits, there’s a lot to remember and understand. We've got you covered with this Intro to Circuits BBC Bitesize guide.

Editor's Note: Here's another take on the transformerless AC line power supply, which finds use in some well-insulated, low-power devices. Our technical reviewer pointed out that C ac should be an ...

2. The half-wave circuit delivers lower current to the input of the wide VIN buck topology than the full-wave circuit can supply. The biggest advantage of these circuits is their size.