A quick calculation: To estimate a battery’s internal resistance, you can use a simple voltage-drop method when the open-circuit voltage, loaded voltage, and current draw are known. For example, if a ...

USB-C cables get no respect. Most people shop for the lowest-priced cable and call it a day under the assumption that they are all the same. They’re not though, and here’s how I weed out the good ...

As part of a power electronics design project involving a 3.6-V dc-dc converter, it became necessary to test and accurately characterize the planar transformer shown in Fig. 1. Transformer operating ...