I have a couple of Chinese programmable lab power supplies. Both switch mode power supply (SMPS) systems are rated for 110V-220V AC input. But the UNI-T UTP1306 power supply has an input voltage ...

This circuit, designed on request, has proven to be useful to indicate when the voltage in a power supply line is changing from 120V to 240Vac. It can be used in different circumstances and circuits, ...

When you're travelling internationally, you just need a normal travel adapter, right? Well, in most cases, yes. If you just want to charge a low-powered device such as phone, camera, tablet or laptop ...