EDN

Simple circuit design tutorial for PoE applications

As the number of Power Over Ethernet (PoE) powered device (PD) applications grows, market pressures are driving designers to lower the cost and complexity of the DC-DC converters that power them, ...
Taste The Code on MSN

12V battery backup circuit tutorial how to build and protect your devices

In this video I’m showing how I’ve built a very simple battery backup circuit for my home alarm system. The circuit charges a ...
Hackaday

FreeCAD Is Simple, According To This Tutorial

Remember learning to tie your shoes or ride a bike? Like many things, that’s easy once you know how to do it, but seems impossible before you learn. [NovaSpirit] asserts that Freecad is simple, and ...
Circuit Digest

Build a Simple Optocoupler Tester Circuit for Fault Detection

Testing for failure with a multimeter is only partially effective, whereas a dedicated optocoupler testing circuit provides ...
EDN

A simple circuit with an optocoupler creates a “tube” sound

This simple scheme is based on the circuit shown below (Figure 1) in my recent article [1]. Figure 1 Using common transistor optocoupler to achieve a tube-like sound. It is known that the main feature ...