How many times have you poked around a circuit with a digital multimeter (DMM), read an AC voltage value, then gone on your merry way? Ever wonder if your meter is giving you peak value, average value ...

On infrequent occasions, I am asked to design a circuit to measure the RMS value of a current or voltage for some kind of power measurement. Since the work I do is hardly unique, I thought some of you ...

Test meters used to just provide the basics: voltage, current, and resistance. Thanks to solid-state circuitry, though, today's instruments are packed with several features the typical electrician may ...