For example, you can insert a resistor, a capacitor, an inductor, a diode, or a transistor and get a readout of which pin is which. It seems like magic, but [Andreas Spiess] did the research on ...

While not the first, the FNIRSI LCR-ST1 are affordable, and [TheHWcave] puts them to the test in the video below. The tweezers come with two different pointy ends. It is more or less one of those ...