The circuit in Figure 1 can help if you must transfer dc power and audio over a pair of copper wires. One application for such a circuit is a low-cost door-opening system with speech input. The ...

[Part 1 looks at advantages and disadvantages of different power supply technologies as well as the design considerations involved in choosing and evaluating a mains transformer. Part 2 considers the ...

To minimize an amplifier’s interference with another, separate power cables should run to amplifier (as in the upper schematic in the image below) That is because servoamps draw appreciable ...

Power supply design is a broad field, requiring entirely different tools and techniques depending on what you’re working with. Creating a low-cost and compact mobile phone charger is a ...