Here are 4 simple 12V power supply circuits with output voltages around 12V. First power supply circuit is built with BD139, one zener diode and a few passive components. Each of the schematic is very ...

The PC power supply has been a standard of the junk box for the last couple of decades, and will probably continue to be for the foreseeable future. A product that is often built to a very high ...

This engineering report describes a constant voltage (CV) output 35 W isolated flyback power supply with a single-stage power factor correction circuit for LED lighting application. The power supply ...

This article explores key mixed-signal applications, highlighting the difference between signal-path faults and rail-driven ...

While troubleshooting the power supply of a 1970s Centurion system, [Usagi Electrics] came across a fascinating feature of these units: the ferroresonant, or constant voltage transformer (CVT). The ...

If the power source is a listed Class 2 transformer or listed Class 2 power supply — or it’s in listed equipment marked to identify the Class 2 power source — you’ve got a Class 2 circuit between the ...

SAN JOSE, Calif. & SAN FRANCISCO--(BUSINESS WIRE)--Power Integrations (NASDAQ: POWI), the leader in high-voltage integrated circuits (IC)s for energy-efficient power conversion, and SnapMagic, a ...

Noise is a constant problem in power-supply design. While there are FCC limits on the electromagnetic interference (EMI) radiating out into the air as well as the conducted noise that your design ...

The distinction between a branch circuit and a feeder can be a source of confusion for many Code users. The first step in eliminating this confusion is to understand that the NEC defines a branch ...