Most of us learned to design circuits with schematics. But if you get to a certain level of complexity, schematics are a pain ...

Why a precision preamplifier is critical to low-side current-sensing performance.

A standard electret microphone can detect sub-audio "sounds" when some simple equalization circuitry is added.

Using a sense resistor is only the first step in the current-sensing decision. The other part is topology: whether to use ...