When you think of a scope probe, you usually think of what is basically a wire with a spring hook and an attenuator. Those are passive probes. [Kerry Wong] shows off a pre-release active probe ...

Using electrochemical impedance spectroscopy (EIS) techniques to help obtain battery working conditions like SOH and SOC.

The first sign is silence. The fridge quits its tiny opera. The Wi-Fi blinks a farewell. Somewhere, a neighbor yells, “Is it just me?” Nope. The lights are out, but this is not the apocalypse; it’s ...

Measuring tiny differences in high-voltage circuits usually requires specialized differential test probes, which are often expensive. Fortunately, it’s possible to build your own high-voltage probe ...