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 ...

The circuit is designed to create a high end preamplifier that would produce a better result of stable and quality audio line. Preamplifier (preamp) – a device normally used together with the sound ...

Ready to solder? This audio series delivers easy-to-build DIY circuits, beginner-friendly components, just enough electronics theory, and more.

[Kevin Darrah] wanted to make a simple 3.3V regulator without using an integrated circuit. He wound up using two common NPN transistors and 4 1K resistors. The circuit isn’t going to beat out a cheap ...

Electronic systems often require multiple voltages to power the various internal circuits. Non-isolated regulators are a common and easy way to convert one voltage to another. Regulators typically ...

DC/DC point-of-load switch mode regulator Circuit with spread spectrum frequency modulation can be designed for low EMI, write Alan Chern, Doug La Porte and Afshin Odabaee Switch mode DC/DC regulators ...

DC power supplies for portable devices are expected to be extremely efficient for the reason of energy consumption, longer run time from the battery pack and greener environments. Using ...